- Inhibition of the hydrogenation of tetralin by nitrogen and sulfur compounds over Ir/SBA-16
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In this work we study the catalytic properties of 5 wt.% Ir-containing SBA-16 catalysts (with and without aluminum as heteroatom), in the hydrogenation of tetralin to decalin, in the presence of 100 ppm of N as quinoline, indole and carbazole, and 100 ppm of S as dibenzothiophene and 4,6-dimethyl- dibenzothiophene at 250 °C and 15 atm of pressure of hydrogen, using a Parr reactor. Ir/SBA-16 and Ir/Al-SBA-16 were prepared by wetness impregnation using Iridium Acetylacetonate as source of Ir. The Ir/SBA-16 catalyst synthesized by us had high activity measured in tetralin hydrogenation at mild conditions. The experimental data was quantitatively represented by a modified Langmuir-Hinshelwood type rate equation, using the apparent adsorption constants calculated from the inhibition results for the individual compounds. The catalyst showed a good resistance to sulfur and nitrogen compounds. The inhibiting effect increased in the order: DBT quinoline 4,6-dimethyl-DBT indole carbazole. The inhibiting effect of the nitrogen/sulfur compounds was strong, but the activity was still higher than with commercial NiMo/alumina catalyst. We present in this contribution a successfully developed, high loaded and well dispersed Ir/SBA-16 catalysts, that have been shown to maintain a useful catalytic activity, even in the presence of relatively high amounts of sulfur compounds (up to 100 ppm, sulfur basis). Consequently, economically successful processes have evolved, based on this class of catalysts.
- Bottazzi, Gerardo Simón Balangero,Martínez, María Laura,Costa, Marcos Bruno Gómez,Anunziata, Oscar Alfredo,Beltramone, Andrea Raquel
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- Fabricating nickel phyllosilicate-like nanosheets to prepare a defect-rich catalyst for the one-pot conversion of lignin into hydrocarbons under mild conditions
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The one-pot conversion of lignin biomass into high-grade hydrocarbon biofuels via catalytic hydrodeoxygenation (HDO) holds significant promise for renewable energy. A great challenge for this route involves developing efficient non-noble metal catalysts to obtain a high yield of hydrocarbons under relatively mild conditions. Herein, a high-performance catalyst has been prepared via the in situ reduction of Ni phyllosilicate-like nanosheets (Ni-PS) synthesized by a reduction-oxidation strategy at room temperature. The Ni-PS precursors are partly converted into Ni0 nanoparticles by in situ reduction and the rest remain as supports. The Si-containing supports are found to have strong interactions with the nickel species, hindering the aggregation of Ni0 particles and minimizing the Ni0 particle size. The catalyst contains abundant surface defects, weak Lewis acid sites and highly dispersed Ni0 particles. The catalyst exhibits excellent catalytic activity towards the depolymerization and HDO of the lignin model compound, 2-phenylethyl phenyl ether (PPE), and the enzymatic hydrolysis of lignin under mild conditions, with 98.3% cycloalkane yield for the HDO of PPE under 3 MPa H2 pressure at 160 °C and 40.4% hydrocarbon yield for that of lignin under 3 MPa H2 pressure at 240 °C, and its catalytic activity can compete with reported noble metal catalysts.
- Cao, Meifang,Chen, Bo,He, Chengzhi,Ouyang, Xinping,Qian, Yong,Qiu, Xueqing
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supporting information
p. 846 - 857
(2022/02/09)
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- Aromatic compound hydrogenation and hydrodeoxygenation method and application thereof
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The invention belongs to the technical field of medicines, and discloses an aromatic compound hydrogenation and hydrodeoxygenation method under mild conditions and application of the method in hydrogenation and hydrodeoxygenation reactions of the aromatic compounds and related mixtures. Specifically, the method comprises the following steps: contacting the aromatic compound or a mixture containing the aromatic compound with a catalyst and hydrogen with proper pressure in a solvent under a proper temperature condition, and reacting the hydrogen, the solvent and the aromatic compound under the action of the catalyst to obtain a corresponding hydrogenation product or/and a hydrodeoxygenation product without an oxygen-containing substituent group. The invention also discloses specific implementation conditions of the method and an aromatic compound structure type applicable to the method. The hydrogenation and hydrodeoxygenation reaction method used in the invention has the advantages of mild reaction conditions, high hydrodeoxygenation efficiency, wide substrate applicability, convenient post-treatment, and good laboratory and industrial application prospects.
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Paragraph 0094-0095; 0106-0113
(2021/05/29)
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- Palladium Nanoparticles in Hypercrosslinked Polystyrene: Synthesis and Application in the Hydrogenation of Arenes
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Abstract: A novel method for incorporation of palladium nanoparticles into a poroushypercrosslinked polystyrene matrix has been developed. The composite obtainedby reduction of [Pd(π-allyl)Cl]2 with hydrogen insupercritical CO2 shows high catalytic activity in thehydrogenation of benzene and can be used twelve (12) times in a row without anydecrease in conversion rate. The catalyst is also suitable for quantitativehydrogenation of toluene, tetralin and phenol. The obtained catalytic system iscompared with the palladium composite synthesized by a conventional method basedon hypercrosslinked polystyrene.
- Lyubimov,Zvinchuk,Korlyukov,Davankov,Parenago
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- Supported noble metal catalyst with a core-shell structure for enhancing hydrogenation performance
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Supported noble metal nanoparticles are a kind of high efficiency of catalysts in aromatics hydrogenation, and the properties and structures of supports are of great importance to improve hydrogenation behaviors. In this work, an efficient Pd/S-1@ZSM-5 core-shell catalyst with an enhanced naphthalene hydrogenation ability was prepared by building acidic nano-ZSM-5 shells surrounding silicalite-1 supported Pd NPs. The acidic nano-ZSM-5 shell can strengthen the spillover hydrogenation due to the increase of the strong acid sites around Pd NPs, and the strong acid sites around metal NPs can be regulated by controlling the coverage of nano-ZSM-5 shell. Additionally, the formed mesoporous structure of nano-ZSM-5 shell is beneficial for the diffusion of bulky reactants. These are the two important factors for enhancing hydrogenation ability of Pd/S-1@ZSM-5 catalyst. Furthermore, Pd/S-1@ZSM-5 catalyst also shows good sulfur-tolerance in the presence of thionaphthene. This work presents an elegant example for enhancing hydrogenation abilities of noble metal catalysts by constructing a core-shell structure.
- Lu, Ningyue,Zhao, Jiaxin,Dong, Qi,Zhao, Yanpeng,Fan, Binbin
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- A new precursor for synthesis of nickel-tungsten sulfide aromatic hydrogenation catalyst
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The unsupported NiWS-catalyst was obtained from the precursor [Ph3S]2Ni(WS4)2 in a hydrocarbon medium (in situ) for hydrogenation bicyclic aromatic compounds. The precursor [Ph3S]2Ni(WS4)2 and the catalyst prepared on its basis were studied by the X-ray diffraction and X-ray absorption methods, XPS and TEM. It was found that the new catalyst formed in situ contains tungsten sulfide and nickel sulfide nanophases. Tungsten sulfide, which has a layered structure, partially forms an insertion compound with nickel that enters between the WS2 layers and bonds covalently to sulfur. The proposed catalyst has proved to be active in the hydrodearomatization processes of model aromatic compounds (naphthalene, methylnaphthalenes) and exhibited the maximum selectivity with the formation of decalins compared to other earlier studied catalysts formed from other precursors in the reaction medium.
- Serdyukov,Kniazeva,Sizova,Zubavichus,Dorovatovskii,Maximov
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- Chemoselective and Tandem Reduction of Arenes Using a Metal–Organic Framework-Supported Single-Site Cobalt Catalyst
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The development of heterogeneous, chemoselective, and tandem catalytic systems using abundant metals is vital for the sustainable synthesis of fine and commodity chemicals. We report a robust and recyclable single-site cobalt-hydride catalyst based on a porous aluminum metal–organic framework (DUT-5 MOF) for chemoselective hydrogenation of arenes. The DUT-5 node-supported cobalt(II) hydride (DUT-5-CoH) is a versatile solid catalyst for chemoselective hydrogenation of a range of nonpolar and polar arenes, including heteroarenes such as pyridines, quinolines, isoquinolines, indoles, and furans to afford cycloalkanes and saturated heterocycles in excellent yields. DUT-5-CoH exhibited excellent functional group tolerance and could be reusable at least five times without decreased activity. The same MOF-Co catalyst was also efficient for tandem hydrogenation–hydrodeoxygenation of aryl carbonyl compounds, including biomass-derived platform molecules such as furfural and hydroxymethylfurfural to cycloalkanes. In the case of hydrogenation of cumene, our spectroscopic, kinetic, and density functional theory (DFT) studies suggest the insertion of a trisubstituted alkene intermediate into the Co–H bond occurring in the turnover limiting step. Our work highlights the potential of MOF-supported single-site base–metal catalysts for sustainable and environment-friendly industrial production of chemicals and biofuels.
- Akhtar, Naved,Begum, Wahida,Chauhan, Manav,Manna, Kuntal,Newar, Rajashree,Rawat, Manhar Singh
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supporting information
(2022/01/19)
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- Ultrasmall Particle Sizes of Walnut-Like Mesoporous Silica Nanospheres with Unique Large Pores and Tunable Acidity for Hydrogenating Reaction
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The large particle sizes, inert frameworks, and small pore sizes of mesoporous silica nanoparticles greatly restrict their application in the acidic catalysis. The research reports a simple and versatile approach to synthesize walnut-like mesoporous silica nanospheres (WMSNs) with large tunable pores and small particle sizes by assembling with Beta seeds. The as-synthesized Beta-WMSNs composite materials possess ultrasmall particulate sizes (70 nm), large radial mesopores (≈30 nm), and excellent acidities (221.6 mmol g?1). Ni2P active phase is supported on the surface of Beta-WMSNs composite materials, and it is found that the obtained composite spherical materials can reduce the Ni2P particle sizes from 8.4 to 4.8 nm with the increasing amount of Beta seeds, which can provide high accessibilities of reactants to the active sites. Furthermore, the unique large pores and ultrasmall particle sizes of Beta-WMSNs samples facilitate the reduction of the diffusion resistance of reactants due to the short transporting length, thus the corresponding Ni2P/Beta-WMSNs composite catalysts show the excellent hydrogenating activity compared to the pure Ni2P/WMSNs catalyst.
- Duan, Aijun,Hu, Di,Li, Huiping,Liu, Cong,Mei, Jinlin,Meng, Qian,Shi, Yu,Wang, Gang,Xiao, Chengkun
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- Fused-ring alkane fuel and photocatalytic preparation process thereof
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A process for preparing a fused-ring alkane fuel, wherein the fused-ring alkane fuel has the following structure: wherein n is 1 or 2; R1, R2, R3, R4 and R5 are H or —CH3 or —CH2CH3; the fused-ring alkane fuel has a density of greater than 0.870 g/cm3, a freezing point of not higher than ?50° C., and a net mass heat value of not less than 42.0 MJ/kg; the process for preparing a fused-ring alkane fuel, wherein the process includes steps of: (1) in a presence of ultraviolet light and a photocatalyst, a Diels-Alder cycloaddition reaction between a substituted or unsubstituted cyclic enone and a substituted or unsubstituted furan molecule occurs to produce a fuel precursor molecule: (2) the fuel precursor molecule obtained in the step (1) is subjected to hydrodeoxygenation to produce the fused-ring alkane fuel.
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Page/Page column 0027; 0028
(2020/07/05)
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- Short time synthesis of titania modified-CMK-3 carbon mesostructure as support for Ir-catalyst applied in catalytic hydrotreating
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Ti-CMK-3 carbon mesoporous was prepared using a novel synthesis method. This new method avoids the hard template synthesis used commonly. The method developed here, allows to reduce time, energy consumptionand cost. Structural and textural characterization of the titanium modified-mesoporous carbonwas performed by N2 adsorption, XRD, UV–vis-DRS, Raman spectroscopy and TEM. The characterization results indicated that the textural and structural properties of the material synthesized by the short time method are comparable with the properties of the material prepared by the hard template method. Ti modified-mesoporous carbon was used as support of the iridium nanoparticles, in order to prepare a catalyst to be tested in model hydrotreating reactions. The catalyst obtained by wet impregnation with iridium acetylacetonate were characterized by ICP-AES, H2 chemisorption, TEM, XPS and FTIR of adsorbed pyridine. The high Ir dispersion and small particle size, along with the moderate Lewis acidity generated by the presence of titanium in the support, were responsible for the good performance and stability of the catalyst in the hydrogenation of tetralin in presence of nitrogen compounds. Main advantage of the present study is the reduction of time and cost in the synthesis of the new material and the applicability for HDT reactions.
- Beltramone, Andrea R.,Juárez, Juliana M.,Ledesma, Brenda C.
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p. 210 - 216
(2018/04/17)
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- Preparation of highly active unsupported Ni–Si–Mo catalyst for the deep hydrogenation of aromatics
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A mesoporous nickel-silicon-molybdenum composite oxide with the phase of ammonium nickel (or silicon) molybdate was synthesized by chemical precipitation and unsupported nickel-silicon-molybdenum sulfide catalysts with various Ni/Si ratios were obtained by sulfidation of the oxide precursors. The oxide precursors and unsupported sulfide catalysts were characterized by XRD, N2 adsorption-desorption, SEM, TPR, and HRTEM. The unsupported nickel-silicon-molybdenum sulfide catalysts were tested in the hydrogenation of naphthalene. It was found that the introduction of Si could increase the specific surface area and improve the pore structure of precursors, and reduce the reduction temperature of Mo species. The results of naphthalene hydrogenation showed that the introduction of Si could significantly improve the hydrogenation activity of the catalysts, especially the Ni9.5Si0.5Mo10 catalyst exhibited the highest aromatic hydrogenation activity at low temperature. Interestingly, it is found that the tetralin selectivity is 100% in the low temperature range (220–260 °C) over Si10Mo10 catalyst, which might be attractive in the production of tetralin and other industrial application.
- Dong, Chengwu,Li, Fan,Liu, Chenguang,Liu, Dong,Wu, Tongtong,Yin, Changlong
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- One-pot dual catalysis for the hydrogenation of heteroarenes and arenes
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A simple dinuclear monohydrido bridged ruthenium complex [{(η6-p-cymene)RuCl}2(μ-H-μ-Cl)] acts as an efficient and selective catalyst for the hydrogenation of various heteroarenes and arenes. The nature of the catalytically active species was investigated using a combination of techniques including in situ reaction monitoring, kinetic studies, quantitative poisoning experiments and electron microscopy, evidencing a dual reactivity. The results suggest that the hydrogenation of heteroarenes proceeds via molecular catalysis. In particular, monitoring the reaction progress by NMR spectroscopy indicates that [{(η6-p-cymene)RuCl}2(μ-H-μ-Cl)] is transformed into monomeric ruthenium intermediates, which upon subsequent activation of dihydrogen and hydride transfer accomplish the hydrogenation of heteroarenes under homogeneous conditions. In contrast, carbocyclic aryl motifs are hydrogenated via a heterogeneous pathway, by in situ generated ruthenium nanoparticles. Remarkably, these hydrogenation reactions can be performed using molecular hydrogen under solvent-free conditions or with 1,4-dioxane, and thus give access to a broad range of saturated heterocycles and carbocycles while generating no waste.
- Chatterjee, Basujit,Kalsi, Deepti,Kaithal, Akash,Bordet, Alexis,Leitner, Walter,Gunanathan, Chidambaram
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p. 5163 - 5170
(2020/09/07)
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- Nickel–Tungsten and Nickel–Molybdenum Sulfide Diesel Hydrocarbon Hydrogenation Catalysts Synthesized in Pores of Aromatic Polymer Materials
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Abstract: Porous aromatic polymer materials based on tetraphenylmethane molecules linked by methylene groups have been synthesized. By impregnating these materials with nickel–tungsten and nickel–molybdenum thiosalts, catalysts for the hydrogenation of bicyclic aromatic hydrocarbons of the diesel fraction have been prepared. Nanoparticles of the active sulfide phase are formed in support pores during the reaction; it is assumed that after the formation of the nanoparticles, the support material will undergo partial degradation to rearrange the mesoporous structure into a macroporous structure providing the best diffusion of substrates to the surface of the sulfide nanoparticles. The synthesized catalysts have been tested in the hydrogenation of naphthalene and naphthalene derivatives at a hydrogen pressure of 5 MPa and a temperature of 380°C.
- Batryshin,Makeeva,Kulikov,Kardasheva, Yu. S.,Maksimov,Karakhanov
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p. 575 - 580
(2019/06/24)
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- Magnetically separable mesoporous silica-supported palladium nanoparticle-catalyzed selective hydrogenation of naphthalene to tetralin
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A novel magnetically separable mesoporous silica-supported palladium catalyst was designed and prepared for the selective hydrogenation of naphthalene to tetralin, which is an important transformation from a practical viewpoint. In the catalyst, Pd nano grains were dispersed uniformly and protected within the mesoporous silica shells being coated on the Fe3O4 core, so that the durability of the catalyst could be significantly improved.
- Yang, Yonghui,Xu, Bolian,He, Jie,Shi, Jianjun,Yu, Lei,Fan, Yining
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- Synthesis and Reactivity of [PCCP]-Coordinated Group 5 Alkyl and Alkylidene Complexes Featuring a Metallacyclopropene Backbone
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The R2P-functionalized tolanes 1a (R = Ph) and 1b (R = iPr) were employed for the synthesis of [PCCP]-coordinated group 5 complexes. In the case of vanadium, the d1-configured dialkyl species [PCCP]V(CH2SiMe3)2 (3a and 3b) were prepared and found to be resistant toward oxidation, i.e., the corresponding alkylidene complexes were not observed upon treatment with various oxidants. For niobium and tantalum, however, the high-valent d0-configured alkyl-alkylidene complexes [PCCP]M(=CHSiMe3)(CH2SiMe3) (M = Nb: 6b, M = Ta: 7b) were obtained for the iPr2P-substituted ligand. Both these alkylidenes, i.e., 6b and 7b, were employed for ring-opening metathesis polymerizations (ROMP) of strained olefins. Although the ??2-alkyne motifs in 6b and 7b are best described as metallacyclopropenes, the unsaturated ligand backbone was neither degraded nor copolymerized over the course of these polymerizations. Upon hydrogenolysis of 7b, however, the metallacyclopropene backbone was partially hydrogenated, and the dinuclear (μ-H)3-bridged tantalum(V) complex 8 featuring a metallacyclopropane substructure was formed. An intermediate in this reaction was shown to catalytically hydrogenate one or both arenes in naphthalene, while the isolated dimeric species 8 was found to be inactive under identical reaction conditions.
- Federmann, Patrick,Richter, Tim,Wadepohl, Hubert,Ballmann, Joachim
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p. 4307 - 4318
(2019/11/03)
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- Ruthenium nanoparticles ligated by cholesterol-derived NHCs and their application in the hydrogenation of arenes
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Herein we present ruthenium nanoparticles (Ru-NPs) stabilized with two rigid NHC ligands derived from cholesterol. The obtained nanoparticles were fully characterized and applied in the hydrogenation of various aromatic compounds under mild conditions. Interestingly, the more bulky ligand gives a slightly lower ligand coverage and a faster catalyst.
- Rakers, Lena,Martínez-Prieto, Luis M.,López-Vinasco, Angela M.,Philippot, Karine,Van Leeuwen, Piet W. N. M.,Chaudret, Bruno,Glorius, Frank
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p. 7070 - 7073
(2018/07/05)
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- Hydrogenation of naphthalene and anthracene on Pt/C catalysts
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Hydrogenation of naphthalene and anthracene deposited on Sibunit and active carbon was studied. The reactions were carried out at a temperature of 280 °C and a pressure of 90 atm. The directions for the complete hydrogenation of the investigated substrates were studied. Correlations between the structures of naphthalene and anthracene and their activity in hydrogen absorption are presented. The hydrogenation rates decrease as the substrate is saturated with hydrogen.
- Kalenchuk,Koklin,Bogdan,Kustov
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p. 1406 - 1411
(2018/10/31)
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- Titanium(III)-Oxo Clusters in a Metal-Organic Framework Support Single-Site Co(II)-Hydride Catalysts for Arene Hydrogenation
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Titania (TiO2) is widely used in the chemical industry as an efficacious catalyst support, benefiting from its unique strong metal-support interaction. Many proposals have been made to rationalize this effect at the macroscopic level, yet the underlying molecular mechanism is not understood due to the presence of multiple catalytic species on the TiO2 surface. This challenge can be addressed with metal-organic frameworks (MOFs) featuring well-defined metal oxo/hydroxo clusters for supporting single-site catalysts. Herein we report that the Ti8(μ2-O)8(μ2-OH)4 node of the Ti-BDC MOF (MIL-125) provides a single-site model of the classical TiO2 support to enable CoII-hydride-catalyzed arene hydrogenation. The catalytic activity of the supported CoII-hydride is strongly dependent on the reduction of the Ti-oxo cluster, definitively proving the pivotal role of TiIII in the performance of the supported catalyst. This work thus provides a molecularly precise model of Ti-oxo clusters for understating the strong metal-support interaction of TiO2-supported heterogeneous catalysts.
- Ji, Pengfei,Song, Yang,Drake, Tasha,Veroneau, Samuel S.,Lin, Zekai,Pan, Xiandao,Lin, Wenbin
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p. 433 - 440
(2018/01/17)
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- Selective hydrogenation of 1-naphthol on USY-supported NiB nanocatalyst
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Selective hydrogenation of 1-naphthol to 5,6,7,8-tetrahydro-1-naphthol was investigated over several Ni- and Pd-based supported catalysts such as supported Ni/γ-Al2O3, Pd/C, and NiB/ultrastable Y zeolite (USY). It was found that USY-
- Wang, Bo,Liu, Hui
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p. 3197 - 3204
(2017/04/21)
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- Ruthenium-nickel-nickel hydroxide nanoparticles for room temperature catalytic hydrogenation
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Improving the utilization of metals in heterogeneous catalysts with excellent catalytic performance, high selectivity and good stability represents a major challenge. Herein a new strategy is disclosed by enabling a nanoscale synergy between a transition metal and a noble metal. A novel Ru/Ni/Ni(OH)2/C catalyst, which is a hybrid of Ru nanoclusters anchored on Ni/Ni(OH)2 nanoparticles (NPs), was designed, prepared and characterized. The Ru/Ni/Ni(OH)2/C catalyst exhibited a remarkable catalytic activity for naphthalene hydrogenation in comparison with existing Ru/C, Ni/Ni(OH)2/C and Ru-Ni alloy/C catalysts. This is mainly attributed to the interfacial Ru, Ni and Ni(OH)2 sites of Ru/Ni/Ni(OH)2/C, where hydrogen is adsorbed and activated on Ru while Ni transfers the activated hydrogen species (as a "bridge") to the activated naphthalene on Ni(OH)2 sites, producing decalin through a highly effective pathway.
- Zhu, Lihua,Shan, Shiyao,Petkov, Valeri,Hu, Weiwei,Kroner, Anna,Zheng, Jinbao,Yu, Changlin,Zhang, Nuowei,Li, Yunhua,Luque, Rafael,Zhong, Chuan-Jian,Ye, Hengqiang,Yang, Zhiqing,Chen, Bing H.
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p. 7869 - 7875
(2017/07/13)
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- Nickel–molybdenum sulfide catalysts supported on an ordered mesoporous polymer for hydrogenating–hydrocracking of model biaromatic petroleum compounds
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Nickel–molybdenum sulfide catalysts have been synthesized in situ in a hydrocarbon medium by the decomposition of the [(n-Bu)4N]2Ni(MoS4)2 precursor complex supported on an ordered mesoporous phenol–formaldehyde polymer in the presence of a sulfiding agent (dimethyl disulfide). The catalytic properties of the samples have been studied in a batch reactor at 380°C and a hydrogen pressure of 5.0 MPa using the example of naphthalene, 1-methylnaphthalene, and 2-methylnaphthalene. The tests have shown that the conversion of biaromatic substrates is close to quantitative and the use of dimethyl disulfide as a sulfiding agent leads to an increase in the amount of complete hydrogenation products, as evidenced by the high content of the active phase in this case.
- Karakhanov,Boronoev,Ignat’eva,Kardasheva, Yu. S.,Filippova, T. Yu.,Maksimov
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p. 673 - 677
(2017/07/26)
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- Hydrodearomatization catalysts based on molybdenum hexacarbonyl Mo(CO)6 supported on mesoporous aromatic frameworks
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A method for synthesizing fine hydrodearomatization catalysts based on the immobilization of molybdenum carbonyl into the pores of mesoporous aromatic frameworks is proposed. It is shown that the amount of the deposited metal and the average size of the resulting particles depend on the support and the deposition method characteristics. The catalytic activity of the synthesized materials in the hydrogenation of bicyclic hydrocarbons at a hydrogen pressure of 5.0 MPa in a temperature range of 330–500°C is studied using the example of naphthalene, methylnaphthalenes, and biphenyl as model substrates.
- Maksimov,Karakhanov,Kulikov,Terenina
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p. 589 - 594
(2017/07/22)
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- Catalytic activity of in situ synthesized MoWNi sulfides in hydrogenation of aromatic hydrocarbons
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MoWNi–sulfide catalysts were obtained in situ by thermal decomposition of metal–polymer precursors based on the copolymers of polymaleic anhydride in a hydrocarbon raw material. The activity of the synthesized catalysts in hydrogenation of bicyclic aromatic hydrocarbons was studied, and the composition and structure of active phase nanoparticles were determined.
- Topolyuk, Yu. A.,Maksimov,Kolyagin, Yu. G.
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p. 205 - 212
(2017/02/26)
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- Platinum and palladium nanoparticles in modified mesoporous phenol - Formaldehyde polymers as hydrogenation catalysts
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Mesoporous polymeric supports modified with sulfo groups and PPI dendrimers have been prepared. Catalysts containing palladium and platinum nanoparticles have been synthesized on their basis. The resulting catalysts have been studied by transmission electron microscopy and X-ray photoelectron spectroscopy. It has been shown that the metal deposition procedure has an effect on the morphology of the resulting catalyst. Catalytic activity has been studied using the example of the hydrogenation of phenylacetylene and naphthalene at temperatures of 80 and 400°C, and pressures of 1.0 and 5.0 MPa, respectively.
- Boronoev,Subbotina,Kurmaeva,Kardasheva, Yu. S.,Maksimov,Karakhanov
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p. 109 - 120
(2016/04/20)
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- Low temperature catalytic hydrogenation naphthalene to decalin over highly-loaded NiMo, NiW and NiMoW catalysts
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Hydrogenation of naphthalene to decalin at low temperatures (140–240 °C) was studied over highly-loaded sulfided NiMo, NiW, and NiMoW catalysts with a supported NiMo/γ-Al2O3 catalyst as comparison. The NiMo, NiW, and NiMoW catalyst precursors were synthesized by hydrothermal reactions, and the corresponding highly-loaded catalysts were made by mixing the precursors with an alumina gel. The catalyst precursors, oxide and sulfided highly-loaded catalysts were characterized by XRD, N2 adsorption-desorption, SEM, and TPR techniques. A highly crystalline phase of ammonium nickel molybdate was detected on the NiMo precursor, and the NiW precursor exhibited sharp XRD peaks attributed to a phase of hydrated tungsten oxide. Typical Ni3S2 and MoS2/WS2 nanoparticles were observed over the sulfided highly-loaded catalysts, and a main reduction peak was detected due to nickel sulfide as revealed by TPR. Catalytic results showed that more than 99.0% of naphthalene was hydrogenated over the sulfided highly-loaded catalysts at 200 °C or higher temperatures, with a very high selectivity to decalin (more than 99.9%) during the same temperature regions over the NiMo and NiMoW catalysts. As a comparison, the reference NiMo/γ-Al2O3 catalyst showed a moderate hydrogenation activity with a naphthalene conversion of 49.6% and a decalin selectivity of 40.1% at 300 °C. The ratios of trans- to cis-decalin on the highly-loaded catalysts and on the NiMo/γ-Al2O3 catalysts varied.
- Liu, Huan,Liu, Chenguang,Yin, Changlong,Liu, Bin,Li, Xuehui,Li, Yanpeng,Chai, Yongming,Liu, Yunqi
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- Selective hydroconversion of naphthalenes into light alkyl-aromatic hydrocarbons
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2-Ring aromatics such as naphthalene and alkyl-naphthalenes constitute a high fraction in the diesel boiling point range by-products from oil refining and petrochemical plants. A two-step catalytic process, consisting of a selective hydrogenation of naphthalenes to tetralins and a subsequent hydrocracking of tetralins into light alkyl-aromatic hydrocarbons rich in BTX (benzene, toluene, xylenes), was postulated and studied in a fixed bed down-flow reactor under a moderate pressure of 3-4 MPa. For the selective hydrogenation of naphthalenes to tetralins, it was found that the catalytic performances of Mo2C-supported catalysts were superior in terms of tetralins yield as well as selectivity to the conventional metal-supported catalysts such as Pt, Co, Ni and NiW supported catalysts. The hydrocracking of tetralin was demonstrated to produce light alkyl-aromatic hydrocarbons rich in BTX over a monofunctional H-Beta and a bifunctional Ni/H-Beta catalyst. For the high per pass yield of BTX in the hydrocracking of tetralin in which chemical equilibrium limits its conversion and product selectivity, the bifunctional Ni/H-Beta catalyst was found to be highly promising compared with the monofunctional H-Beta catalyst. The bifunctional Ni/H-Beta showed the BTX selectivity in liquid product and the total BTX yield as high as 69.5% and 40.7 wt%, respectively, at the tetralin conversion of 99.5% at 450 °C under 4 MPa. The catalytic behavior of Ni/H-Beta suggests that BTX yield can be much improved by properly controlling the hydrogenation power of metallic sites (i.e., suppressing the hydrogenation activity), the acidity of H-Beta and their balance on the bifunctional hydrocracking catalysts.
- Choi, Yeseul,Lee, Jihye,Shin, Jaeuk,Lee, Seulah,Kim, Donguk,Lee, Jung Kyoo
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p. 140 - 150
(2015/05/05)
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- The hydrogenation of aromatic-naphthalene with Ni2P/CNTs
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Ni2P/CNTs was synthesized using an impregnation method. XPS revealed that CNTs could affect the electronic properties of bulk Ni2P. The catalyst shows superior activity for HYD of naphthalene with a conversion of 99%, and demonstrates superior tolerance towards potential catalyst poisons, which is higher than Ni/CNTs with a conversion of 89%.
- Ruan, Minzhi,Guan, Jun,He, Demin,Meng, Tao,Zhang, Qiumin
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p. 57700 - 57703
(2015/07/20)
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- Selective hydroconversion of naphthalenes into light alkyl-aromatic hydrocarbons
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2-Ring aromatics such as naphthalene and alkyl-naphthalenes constitute a high fraction in the diesel boiling point range by-products from oil refining and petrochemical plants. A two-step catalytic process, consisting of a selective hydrogenation of naphthalenes to tetralins and a subsequent hydrocracking of tetralins into light alkyl-aromatic hydrocarbons rich in BTX (benzene, toluene, xylenes), was postulated and studied in a fixed bed down-flow reactor under a moderate pressure of 3-4 MPa. For the selective hydrogenation of naphthalenes to tetralins, it was found that the catalytic performances of Mo2C-supported catalysts were superior in terms of tetralins yield as well as selectivity to the conventional metal-supported catalysts such as Pt, Co, Ni and NiW supported catalysts. The hydrocracking of tetralin was demonstrated to produce light alkyl-aromatic hydrocarbons rich in BTX over a monofunctional H-Beta and a bifunctional Ni/H-Beta catalyst. For the high per pass yield of BTX in the hydrocracking of tetralin in which chemical equilibrium limits its conversion and product selectivity, the bifunctional Ni/H-Beta catalyst was found to be highly promising compared with the monofunctional H-Beta catalyst. The bifunctional Ni/H-Beta showed the BTX selectivity in liquid product and the total BTX yield as high as 69.5% and 40.7 wt%, respectively, at the tetralin conversion of 99.5% at 450°C under 4 MPa. The catalytic behavior of Ni/H-Beta suggests that BTX yield can be much improved by properly controlling the hydrogenation power of metallic sites (i.e., suppressing the hydrogenation activity), the acidity of H-Beta and their balance on the bifunctional hydrocracking catalysts.
- Choi, Yeseul,Lee, Jihye,Shin, Jaeuk,Lee, Seulah,Kim, Donguk,Lee, Jung Kyoo
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p. 140 - 150
(2015/05/05)
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- From lignocellulosic biomass to renewable cycloalkanes for jet fuels
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A novel pathway was investigated to produce jet fuel range cycloalkanes from intact biomass. The consecutive processes for converting lignocellulosic biomass into jet fuel range cycloalkanes principally involved the use of the well-promoted ZSM-5 in the process of catalytic microwave-induced pyrolysis and RANEY nickel catalysts in the hydrogen saving process. Up to 24.68% carbon yield of the desired C8-C16 aromatics was achieved by catalytic microwave pyrolysis at 500 °C. We observed that solvents could assist in the hydrogenation reaction of naphthalene; and the optimum result for maximizing the carbon selectivity (99.9%) of decalin was obtained from the reaction conducted in the n-heptane medium. The recovery of organics could reach ～94 wt% after the extraction process. These aromatics in the n-heptane medium were eventually hydrogenated into jet fuel range cycloalkanes. Various factors were analyzed to determine the optimal result under mild conditions. An increased catalyst loading, reaction temperature, and prolonged time could enhance the hydrogenation reactions to improve the selectivity of jet fuel range cycloalkanes. Three types of hydrogenation catalysts (NP Ni, RANEY Ni 4200, home-made RANEY Ni) were chosen to evaluate the catalytic performance. The results indicated that the home-made RANEY nickel is the optimal catalyst to obtain the highest selectivity (84.59%) towards jet fuel range cycloalkanes. These cycloalkanes obtained can be directly used as additives to synthesize the desired jet fuels by blending with other hydrocarbons. Hence integration of catalytic processes and conversion of lignocellulosic biomass paved a new avenue for the development of green bio-jet fuels over inexpensive catalysts under mild conditions.
- Zhang, Xuesong,Lei, Hanwu,Zhu, Lei,Wu, Joan,Chen, Shulin
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p. 4736 - 4747
(2015/10/12)
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- Ruthenium nanoparticles supported on magnesium oxide: A versatile and recyclable dual-site catalyst for hydrogenation of mono- and poly-cyclic arenes, N-heteroaromatics, and S-heteroaromatics
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The development of catalysts capable of promoting hydrogenation of aromatics while being resistant to poisoning by nitrogen- and sulfur-containing species is of much interest in connection with hydrotreating of fossil fuels. We report a catalyst composed of ruthenium nanoparticles supported on magnesia, designed to promote heterolytic hydrogen splitting and surface ionic hydrogenation pathways. The catalyst, prepared through a one-pot procedure, promotes the hydrogenation of mono- and poly-cyclic arenes, as well as N- and S-heteroaromatics representative of fossil fuels components. Of particular significance are the superior activity and wider substrate scope of the catalyst, in relation to other known supported noble metals, and the excellent recyclability and long catalyst lifetime. Based on our experimental data, a dual-site catalyst structure and an associated dual-pathway mechanism are proposed, which may have interesting implications for the development of new poison-tolerant noble metal catalytic systems.
- Fang, Minfeng,Sanchez-Delgado, Roberto A.
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p. 357 - 368
(2014/02/14)
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- Novel Ni2P/zeolite catalysts for naphthalene hydrocracking to BTX
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Ni2P catalysts supported on ZSM-5, Beta, and USY zeolites were prepared by temperature-programmed reduction (TPR), applied for the hydrocracking of naphthalene, and characterized by BET, CO uptake, NH 3-TPD, TEM, X-ray diffraction (XRD), and extended X-ray absorption fine structure (EXAFS). The catalytic activity was tested at 673 K and 3.0 MPa in a three-phase fixed bed reactor for hydrocracking of naphthalene. The Ni 2P/Beta exhibited best activity with a naphthalene conversion of 99%, and a BTX yield of 94.4%. Well-dispersed Ni2P particles combined with moderate acidity and porosity of zeolite Beta contributed to the enhanced hydrocracking activity of naphthalene into BTX.
- Kim, Yong-Su,Yun, Gwang-Nam,Lee, Yong-Kul
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p. 133 - 138
(2014/01/06)
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- Catalytic hydrogenation of aromatic rings catalyzed by Pd/NiO
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A simple and efficient heterogeneous palladium catalyst was prepared for aromatic ring hydrogenation. The catalyst was prepared by a reduction-deposition method and exhibited high activity and selectivity for the hydrogenation of a variety of substituted aromatic compounds to the corresponding cyclohexane and cyclohexanol derivatives with up to 99% yields. The catalyst was characterized by BET, TEM, XRD, XPS and ICP. Meanwhile the reusability of the catalyst was investigated, and it can be reused for several runs without significant deactivation.
- Wang, Yanan,Cui, Xinjiang,Deng, Youquan,Shi, Feng
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p. 2729 - 2732
(2014/01/06)
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- An efficient cleavage of the aryl ether C-O bond in supercritical carbon dioxide-water
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A simple and highly efficient Rh/C catalyzed route for the cleavage of the C-O bond of aromatic ether at 80 °C in the presence of 0.5 MPa of H 2 in the scCO2-water medium is reported; CO2 pressure and water play a key role under the tested conditions.
- Chatterjee, Maya,Ishizaka, Takayuki,Suzuki, Akira,Kawanami, Hajime
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supporting information
p. 4567 - 4569
(2013/06/04)
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- Quenched skeletal Ni as the effective catalyst for selective partial hydrogenation of polycyclic aromatic hydrocarbons
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Quenched skeletal Ni is an active and selective catalyst for selective partial hydrogenation of polycyclic aromatic hydrocarbons (PAHs). The molecular structure of PAHs significantly dominate the hydrogenation process and furthermore, the distribution of hydrogenated products.
- Liu, Chengyun,Rong, Zeming,Sun, Zhuohua,Wang, Yong,Du, Wenqiang,Wang, Yue,Lu, Lianhai
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p. 23984 - 23988
(2013/11/19)
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- Hydrogenolysis-hydrogenation of aryl ethers: Selectivity pattern
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The selectivity pattern of nickel-catalyzed hydrogenolysis-hydrogenation of aryl ethers has been studied in the micellar media. The micellar conditions selectively formed arenes and alcohols with enhanced yields.
- Samant, Bhupesh S.,Kabalka, George W.
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supporting information; experimental part
p. 8658 - 8660
(2012/10/08)
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- Activated carbon supported molybdenum carbides as cheap and highly efficient catalyst in the selective hydrogenation of naphthalene to tetralin
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The selective hydrogenation of naphthalene to tetralin has been conducted on Mo2C/AC prepared by microwave irradiation, and achieved a lasting high conversion with 100% selectivity up to 60 hours. The choice of activated carbon as a support is critical in gaining an ideal balance between high activity and good stability of the catalyst.
- Pang, Min,Liu, Chunyan,Xia, Wei,Muhler, Martin,Liang, Changhai
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supporting information; experimental part
p. 1272 - 1276
(2012/06/15)
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- Water as an additive to enhance the ring opening of naphthalene
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Use of water as a reaction medium or additive to enhance reaction efficiency is an important topic in green chemistry, and ring opening and contraction reactions of aromatics are crucial for upgrading diesels. In this work, we investigated the effect of water on the yields of ring opening and contraction reactions of naphthalene. A series of catalysts, such as Rh 2O3/HY zeolite, Mo-Ni oxide and their physical mixtures, were used as the catalysts. The influences of the amount of water, hydrogen pressure, reaction temperature and reaction time on the yields of the ring opening and contraction products (ROCP) were studied. It was found that Rh 2O3/HY and Mo-Ni oxide showed an excellent synergistic effect for catalyzing the reaction, and water could be used as a green and efficient additive for enhancing the yield of the ROCP. At the optimized conditions, the yield of the ROCP could be as high as 63.3%. The mechanism for the effect of water on the reactions was discussed on the basis of control experiments.
- Wang, Qian,Fan, Honglei,Wu, Suxiang,Zhang, Zhaofu,Zhang, Peng,Han, Buxing
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scheme or table
p. 1152 - 1158
(2012/06/18)
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- A comparative study of ring opening of naphthalene, tetralin and decalin over Mo2C/HY and Pd/HY catalysts
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The conversion of naphthalene, tetralin or decalin to ring-opened products over Mo2C/HY, Mg- or K-Mo2C/HY, and a commercial Pd/HY catalyst, is reported. Conversion of all reactants at 300 °C and 3 MPa was higher over the Pd/HY catalyst than the Mo2C/HY catalysts. Tetralin was the least reactive among the three model compounds over both Pd/HY and Mo2C/HY. With decalin as reactant, higher selectivity to C 10 products was obtained over the Mo2C/HY catalysts compared to the Pd/HY. The addition of K or Mg to Mo2C/HY improved the Mo2C dispersion while K also moderated the catalyst Bronsted acidity. The conversion of all three reactants was reduced by the addition of Mg or K to the Mo2C/HY, as was the carbon deposition. For all the studied catalysts, carbon deposition was lowest after reaction with decalin compared to naphthalene or tetralin. These results suggest that the deposited carbon has as its precursor, species that are derived from naphthalene or tetralin, rather than decalin, and the coke species are generated through bimolecular reactions on acid sites. Consequently, the catalysts with higher hydrogenation activity (Pd/HY and 1% K-7% Mo2C/HY) had lower deactivation rates.
- Ardakani, Shahrzad Jooya,Smith, Kevin J.
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scheme or table
p. 36 - 47
(2012/01/05)
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- Hydrogenation of arenes and N-heteroaromatic compounds over ruthenium nanoparticles on poly(4-vinylpyridine): A versatile catalyst operating by a substrate-dependent dual site mechanism
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A nanostructured catalyst composed of Ru nanoparticles immobilized on poly(4-vinylpyridine) (PVPy) has been synthesized by NaBH4 reduction of RuCl3·3H2O in the presence of the polymer in methanol at room temperature. TEM measurements show well-dispersed Ru nanoparticles with an average diameter of 3.1 nm. Both powder XRD patterns and XPS data indicate that the Ru particles are predominantly in the zerovalent state. The new catalyst is efficient for the hydrogenation of a wide variety of aromatic hydrocarbons and N-heteroaromatic compounds representative of components of petroleum-derived fuels. The experimental data indicate the existence of two distinct active sites in the nanostructure that lead to two parallel hydrogenation pathways, one for simple aromatics involving conventional homolytic hydrogen splitting on Ru and a second one for N-heteroaromatics taking place via a novel heterolytic hydrogen activation on the catalyst surface, assisted by the basic pyridine groups of the support.
- Fang, Minfeng,MacHalaba, Nataliya,Sanchez-Delgado, Roberto A.
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experimental part
p. 10621 - 10632
(2011/11/29)
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- The effect of Mg and K addition to a Mo2C/HY catalyst for the hydrogenation and ring opening of naphthalene
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The effect of Mg (0.5-2 wt.%) or K (1 wt.%) added to a 20 wt.% Mo 2C/HY catalyst for the hydrogenation and ring opening of naphthalene, is reported. Mg addition increased Mo2C dispersion without affecting catalyst acidity, whereas K increased Mo2C dispersion but decreased acidity by 30%. Both Mg-Mo2C/HY and K-Mo2C/HY increased naphthalene and coke-precursor hydrogenation whereas ring-opening selectivity was reduced compared to the Mo2C/HY. Metal dispersion and catalyst acidity are key parameters that determine bifunctional catalyst performance. Although Mg and K addition improved Mo2C dispersion they did not provide the optimum acidity needed for increased ring-opening selectivity.
- Liu, Xuebin,Ardakani, Shahrzad Jooya,Smith, Kevin J.
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scheme or table
p. 454 - 458
(2011/12/16)
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- Promotion of Ni/SBA-15 catalyst for hydrogenation of naphthalene by pretreatment with ammonia/water vapour
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The activities of nickel supported on SBA-15 catalysts, which were prepared by pretreatment with ammonia/water vapour, were investigated by hydrogenation of naphthalene. Comparing with the un-pretreated catalysts, the pretreated catalysts exhibited significant activity, and naphthalene conversion was improved approximately 100% over the un-pretreated catalysts. The formation of NH4NO3 during pretreatment, which helped to reduce NO 2/O2 generation thus enhancing the dispersion of NiO, was considered to be the main reason for the increased Ni0 dispersion and the enhanced activity of the catalyst pretreated with ammonia/water vapour.
- Ren, Shibiao,Zhang, Ping,Shui, Hengfu,Lei, Zhiping,Wang, Zhicai,Kang, Shigang
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experimental part
p. 132 - 136
(2010/12/25)
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- Ammonia-free Birch reductions with sodium stabilized in silica gel, Na-SG(I)
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Ammonia-free Birch reduction conditions were developed based upon sodium stabilized in silica gel for a variety of substrates. In general, the yields were similar to those reported for lump sodium in liquid ammonia.
- Costanzo, Michael J.,Patel, Mitul N.,Petersen, Kathryn A.,Vogt, Paul F.
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supporting information; experimental part
p. 5463 - 5466
(2010/01/11)
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- METHOD FOR PREPARING HIGH ENERGY FUELS
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A method for preparing the low carbon number petrochemical products along with the high energy fuels from pyrolysis gasoline is provided. In this method, the pyrolysis gasoline is used as feedstock, and the reactive non-aromatic, unsaturated moieties, and the sulfur impurity contained in the pyrolysis gasoline are removed. Then the stabilized feedstock is used to produce C5 olefins, C6-C9 aromatic hydrocarbons as petrochemical products, and C10+ hydrocarbons as precursors of high energy fuels. Upon acid catalytic isomerization, or upon crystallization followed by acid catalytic isomerization, the C10+ hydrocarbons as precursors of high energy fuels are converted to exo-isomers as high energy fuels.
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Page/Page column 8
(2008/12/04)
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- Hydrogenation of arenes by dual activation: Reduction of substrates ranging from benzene to C60 fullerene under ambient conditions
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(Chemical Equation Presented) Tackling aromaticity: The title reaction was accomplished by simultaneous activation of molecular hydrogen and the aromatic substrate by Pd/C and a Lewis acidic ionic liquid, respectively. Even benzene and C60 fullerene were hydrogenated under ambient conditions (1 bar of H2 at room temperature). An ionic hydrogenation mechanism (see scheme) is supported by characterization of a stabilized arenium intermediate.
- Deshmukh, Ravindra R.,Lee, Ji Woong,Shin, Ueon Sang,Lee, Jin Yong,Song, Choong Eui
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supporting information; body text
p. 8615 - 8617
(2009/05/15)
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- Rhodium and iridium nanoparticles entrapped in aluminum oxyhydroxide nanofibers: Catalysts for hydrogenations of arenes and ketones at room temperature with hydrogen balloon
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The recyclable metal nanoparticle catalysts, rhodium in aluminum oxyhydroxide [Rh/ AlO(OH)] and iridium in aluminum oxyhydroxide [Ir/A1O(OH)], were simply prepared from readily available reagents. The catalysts showed high activities in the hydrogenation of various arenes and ketones under mild conditions. Selective hydrogenation was possible for bicyclic and tricyclic arenes in high yields. The catalysts were active at room temperature even with a hydrogen balloon. Also, the catalysts showed high turnover frequency (TOF) values under solventless conditions at 75 °C under 4 atm hydrogen pressure: ca. 1700h 1 in the hydrogenation of benzene. Furthermore, Rh/A1O(OH) can be reused forat least 10 times without activity loss. The catalysts were characterized by the transmission electron microscopy (TEM), powder X-ray diffraction (XRD), inductively coupled plasma (ICP), energy dispersive X-ray analysis (EDX), X-ray photoelectron spectroscopy (XPS), nitrogen adsorption and hydrogen chemisorption experiments. The sizes of rhodium and iridium particles were estimated to be 3-4 nm and 2-3 nm, respectively. Aluminum oxyhydroxide nanofibers of these catalysts have surface areas of 500-600 m2 g -1.
- Park, In Soo,Kwon, Min Serk,Kang, Kyung Yeon,Lee, Jae Sung,Park, Jaiwook
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p. 2039 - 2047
(2008/09/17)
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- ORGANIC HYDRIDE SYNTHESIZING APPARATUS, ORGANIC HYDRIDE SYNTHESIZING SYSTEM AND HYDROGEN PRODUCTION APPARATUS
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It is intended to realize storage and transportation of large amounts of energy and to carry out storage or supply of energy in conformity with fluctuation of natural energy. There is provided an organic hydride synthesizing apparatus capable of hydrogenation reaction between an unsaturated hydrocarbon and hydrogen in the presence of a catalyst to thereby accomplish synthesis of an organic hydride, which organic hydride synthesizing apparatus comprises a catalyst, heating means (3a) for heating the catalyst, hydrogen supply rate detection means (25) for detecting the rate of hydrogen supply to the interior of the apparatus, and control means (31),(32),(33) for in accordance with the supply rate, controlling the rate of unsaturated hydrocarbon fed, the rate of product recycled and the temperature of the catalyst.
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Page/Page column 6-7; 1/4-2/4
(2008/06/13)
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- Reduction of naphthalene concentration in aromatic fluids
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A process for reducing naphthalene concentration in a naphthalene containing aromatic fluid, the process comprises hydrogenating at least a portion of the naphthalene in the presence of a Group VIII metal catalyst at a temperature from 50° C. to 110° C. to form tetrahydronaphthalene.
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Page/Page column 3-4
(2008/06/13)
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- Partial ring hydrogenation of naphthols over supported metal catalysts in supercritical carbon dioxide solvent
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Selective ring hydrogenation of naphthols to tetrahydronaphthols and tetralones proceeded at 323 K over a charcoal supported rhodium catalyst in supercritical carbon dioxide. Copyright
- Mine, Eiichi,Haryu, Eiji,Arai, Kunio,Sato, Takafumi,Sato, Osamu,Sasaki, Akiyoshi,Rode, Chandrashekhar V.,Shirai, Masayuki
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p. 782 - 783
(2007/10/03)
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- Enhanced selectivity to decalin in naphthalene hydrogenation under supercritical carbon dioxide
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A charcoal-supported rhodium catalyst was highly active and selective to decalin for the hydrogenation of naphthalene at very low temperature (333 K) under supercritical carbon dioxide. Copyright
- Hiyoshi, Norihito,Miura, Ritsuko,Rode, Chandrashekhar V.,Sato, Osamu,Shirai, Masayuki
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p. 424 - 425
(2007/10/03)
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