528-50-7Relevant articles and documents
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Deferrari,Cadenas
, p. 1070 (1963)
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Ru/P-containing porous biochar-efficiently catalyzed cascade conversion of cellulose to sorbitol in water under medium-pressure H2 atmosphere
Chen, Shuainan,Fu, Zaihui,Jiang, Dabo,Liu, Yachun,Mao, Feng,Wan, Feifei,Xiong, Manman,Yang, Long,Zhang, Chao,Zhang, Qiao
, p. 1026 - 1035 (2020/09/22)
This paper discloses a simple and productive strategy for the preparation of biochar-based bifunctional catalysts. In this strategy, very cheap bamboo powder is thermally carbonized to yield P-containing porous biochars (PBCs) by the activation of concentrated phosphoric acid (H3PO4), and the latter can be transformed into the target catalysts via loading Ru nanometer particles (NPs) on them (marked as Ru/PBCs). A series of characterizations and measurements support that PBCs have stable and rich micro-meso pores and small strong acidic protons (0.100.28 mmol￠g11) attributable to the grafted and/or skeleton phosphorus groups, as well as a strong affinity to β-1,4-glycosidic bonds, thus exhibiting a good acid catalytic activity for the hydrolysis of cellulose to glucose. More importantly, they are excellent acidic supports for the loading of Ru NPs owing to high BET surface area, which can give the loaded Ru NPs uniform and narrow distribution (16 nm). The resulting bifunctional Ru/PBCs catalysts possess excellent hydrolytic hydrogenating activity for the one-pot cascade conversion of cellulose and the optimized conditions can achieve ca. 89% hexitol yield with 98% sorbitol selectivity under relatively mild conditions. This work provides a good example for the preparation of biomass-derived bifunctional catalysts and their applications in biorefinery.
A solvent-free, one-step synthesis of sulfonic acid group-functionalized mesoporous organosilica with ultra-high acid concentrations and excellent catalytic activities
Wu, Qin,Liu, Fujian,Yi, Xianfeng,Zou, Yongcun,Jiang, Lilong
, p. 1020 - 1030 (2018/03/13)
We demonstrate herein a novel solvent-free technique for the synthesis of sulfonic acid group-functionalized mesoporous organosilica, which was achieved from the self-assembly of a block copolymer template using mercaptopropyltrimethoxysilane (MPTS) and tetramethoxysilane (TMOS) under melting conditions without using additional solvents and subsequent condensation at high temperature (up to 140 °C). The resultant samples were designated as SMS-xs, where x stands for molar ratio of MPTS/(MPTS + TMOS). SMS-xs have relatively large BET surface areas, highly cross-linked frameworks, and abundant and uniform mesopores with wormhole-like characteristics. Interestingly, MPTS could be used as the solo precursor to prepare mesoporous organosilica (SMS-1.0), which had controllable acidity and an ultra-high concentration of sulfur (5.51 mmol g-1, the highest acid density to date), which was even higher than those of commercial Amberlyst 15 (4.7 mmol g-1), HS-JLU-20-0.8 (4.61 mmol g-1) and sulfonated carbon (CH0.30O0.33S0.16, 4.90 mmol g-1). These structural characteristics give SMS-xs excellent activities and good reusability in biomass conversions and fine chemicals synthesis, which are much better than various solid acids, such as Amberlyst 15, H-form USY zeolite, and sulfonic acid group-functionalized ordered mesoporous silica.
Hydrolysis of cellulose to glucose over carbon catalysts sulfonated via a plasma process in dilute acids
Li, Oi Lun,Ikura, Ryuhei,Ishizaki, Takahiro
, p. 4774 - 4777 (2017/10/23)
Herein, we reported a novel plasma-sulfonation process for carbon materials in dilute sulfuric acid within a few tens of minutes. The total acidic and -SO3H densities of the sulfonated carbon were 4.4 mmol g-1 and 2.2 mmol g-1, respectively. The glucose selectivity during cellulose hydrolysis using a sulfonated carbon catalyst was 83.9% and retained 98% of its performance after recycling.
