1560-89-0Relevant academic research and scientific papers
Effect of precursor acidity on zeolite supported Pd catalyst properties and hydrodeoxygenation activity for the production of biofuel
Ayodele,Farouk, Hamisu U.,Mohammed, Jibril,Uemura, Yoshimitsu,Daud
, p. 179 - 186 (2015)
In this study, two different zeolite (ZLT) supported palladium catalysts (Pd/Zs) of varying acidity were synthesized, characterized and tested for biofuel production. The first Pd/Z was synthesized via the incorporation of palladium oxalate complex (PdOxC
Role of support in deoxygenation and isomerization of methyl stearate over nickel-molybdenum catalysts
Qian, Eika W.,Chen, Ning,Gong, Shaofeng
, p. 76 - 85 (2014)
Microporous SAPO-11 and highly ordered mesoporous AlSBA-15 with different aluminum contents (with Si/Al ratio of 5 and 10) were synthesized. Thus prepared samples were characterized by BET, pyridine-FTIR and NH3-TPD to investigate their structural and acidic properties. The samples were then transformed into bifunctional catalysts by loading with molybdenum and nickel. Their activities were tested in the hydroconversion of methyl stearate using a fixed bed flow reactor system. The sulfided NiMo catalysts exhibited high conversion and deoxygenation activities. High isomerization activities observed for both NiMo/SAPO-11 and NiMo/AlSBA-15 catalysts, similar to the isomerization of light naphtha, was attributed to the acidity of supports. However, the acidity of supports was not the only factor influencing the isomerization of long chain molecules. AlSBA-15 had a large specific surface area that contained more acidic sites inside of its channels, promoting the formation of cracking products; SAPO-11 had a suitable pore size and contained fewer acidic sites inside the pore channels, promoting the formation of mono-branched isomers while suppressing cracking reactions.
Construction of bifunctional co/h-zsm-5 catalysts for the hydrodeoxygenation of stearic acid to diesel-range alkanes
Wu, Guangjun,Zhang, Nan,Dai, Weili,Guan, Naijia,Li, Landong
, p. , 2179 (2018/10/20)
Bifunctional Co/H-ZSM-5 zeolites were prepared by a surface organometallic chemistry grafting route, namely, by the stoichiometric reaction between cobaltocene and the Br?nsted acid sites in zeolites. The catalyst was applied to a model reaction of the catalytic hydrodeoxygenation of stearic acid (SA). The cobalt species existed in the form of isolated Co2 + ions at the exchange positions after grafting, transformed to CoO species on the surface of the zeolite, stabilized inside the zeolite channels upon calcination in air, and finally reduced by hydrogen to homogeneous clusters of metallic cobalt species approximately 1.5 nm in size. During this process, the Br?nsted acid sites of the H-ZSM-5 zeolites were preserved with a slight-ly reduced acid strength. The as-prepared bifunctional catalyst exhibited an approximately 16 times higher activity for the hydrodeoxygenation of SA (2.11 gSA gcat1 h1) than the reference catalyst (0.13 gSA gcat1 h1) prepared by solid-state ion exchange and a high C18 /C17 ratio of approximately 24. The remarkable hydrodeoxygenation performance of the bifunctional Co/H-ZSM-5 was owed to the effective synergy between the uniformed metallic cobalt clusters and the Br?nsted acid sites in H-ZSM-5. The simplified reaction network and kinetics of the SA hydrodeoxygenation catalyzed by the as-prepared bifunctional Co/H-ZSM-5 zeolites were also investigated.
CATALYTIC PROCESS FOR CONVERTING RENEWABLE RESOURCES INTO PARAFFINS FOR USE AS DIESEL BLENDING STOCKS
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Page/Page column 7, (2009/01/24)
A process for converting renewable resources such as vegetable oil and animal fat into paraffins in a single step which comprises contacting a feed which is a renewable resources with hydrogen and a catalyst which comprises molybdenum, a non-precious metal and an oxide to produce a hydrocarbon product having a ratio of even-numbered hydrocarbons to odd-numbered hydrocarbons of at least 2:1.
Process for hydrogenation of carboxylic acids and derivatives to hydrocarbons
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Page/Page column 7-8, (2008/06/13)
A process for hydrogenating a carboxylic acid and/or derivative thereof having a carboxylate group represented by the general formula R1COO-, which process comprises feeding hydrogen and the carboxylic acid and/or derivative thereof to a reactor and maintaining conditions within the reactor such that hydrogen reacts with the carboxylic acid and/or derivative thereof to produce a product stream comprising carbon dioxide, carbon monoxide, methane and hydrocarbons represented by general formulae R1H and R1CH3, characterised in that the molar ratio of R1H : R1CH3 is above a pre-determined value and/or the mole ratio of the sum of carbon dioxide, carbon monoxide and methane to carboxylate groups is above a pre-determined value.
Ultrasound mediated synthesis of a few naturally occurring compounds
Singh,Kaur,Nayyar,Bhandari,Kad
, p. 386 - 390 (2007/10/03)
Synthesis of 2-methylheptadecane 1, 14-methylpentadecan-3-one 2, 6-oxo-1-nonanol 3, 5-(Z)-undecenoic acid 4 and 2-tridecanone 5 have been accomplished utilizing zinc-copper couple catalyzed conjugate addition of α,β-unsaturated carbonyl compounds under aqueous sonochemical conditions as the key step.
Synthesis of 14-methylpentadecan-3-one and 2-methylheptadecane
Kad, G. L.,Gupta, Sangita
, p. 581 - 583 (2007/10/02)
Li2CuCl4 catalysed coupling of 1-tetrahydropyranyloxy-8-octanylmagnesium bromide (III) with isobutyl bromide yields IV which on depyranylation with PPTS/MeOH followed by treatment with PBr3 affords the key intermediate 1-bromo-10-methylundecane (VI).Regioselective alkylation of α-lithio-2-butanone N,N-dimethylhydrazone with VI in THF at -78 deg C followed by oxidative hydrolysis with aq.NaIO4 at pH 7 results in the formation of 14-methylpentadecan-3-one (I).Coupling of VI with hexylmagnesium bromide using Li2CuCl4 as catalyst furnishes the target compound (II).
