Journal ArticleDOI
Reaction pathways for the deoxygenation of vegetable oils and related model compounds.
Robert W. Gosselink,Stefan A. W. Hollak,Shu-Wei Chang,Jacco van Haveren,Krijn P. de Jong,Johannes H. Bitter,Daan S. van Es +6 more
TLDR
It is shown that the type of catalyst has a significant effect on the deoxygenation pathway, that is, group 10 metal catalysts are active in decarbonylation/decarboxylation whereas metal sulfide catalyststs are more selective to hydrode oxygengenation.Abstract:
Vegetable oil-based feeds are regarded as an alternative source for the production of fuels and chemicals. Paraffins and olefins can be produced from these feeds through catalytic deoxygenation. The fundamentals of this process are mostly studied by using model compounds such as fatty acids, fatty acid esters, and specific triglycerides because of their structural similarity to vegetable oils. In this Review we discuss the impact of feedstock, reaction conditions, and nature of the catalyst on the reaction pathways of the deoxygenation of vegetable oils and its derivatives. As such, we conclude on the suitability of model compounds for this reaction. It is shown that the type of catalyst has a significant effect on the deoxygenation pathway, that is, group 10 metal catalysts are active in decarbonylation/decarboxylation whereas metal sulfide catalysts are more selective to hydrodeoxygenation. Deoxygenation studies performed under H2 showed similar pathways for fatty acids, fatty acid esters, triglycerides, and vegetable oils, as mostly deoxygenation occurs indirectly via the formation of fatty acids. Deoxygenation in the absence of H2 results in significant differences in reaction pathways and selectivities depending on the feedstock. Additionally, using unsaturated feedstocks under inert gas results in a high selectivity to undesired reactions such as cracking and the formation of heavies. Therefore, addition of H2 is proposed to be essential for the catalytic deoxygenation of vegetable oil feeds.read more
Citations
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Journal ArticleDOI
Selective Transformations of Triglycerides into Fatty Amines, Amides, and Nitriles by using Heterogeneous Catalysis
Md. A. R. Jamil,S. M. A. Hakim Siddiki,Abeda Sultana Touchy,Md. Nurnobi Rashed,Sharmin Sultana Poly,Yuan Jing,Kah Wei Ting,Takashi Toyao,Takashi Toyao,Zen Maeno,Ken-ichi Shimizu,Ken-ichi Shimizu +11 more
TL;DR: Three heterogeneous catalytic methods are reported for the selective one-pot transformation of triglycerides into value-added chemicals, widely applicable to the transformation of various triglycerides (C4 -C18 skeletons) into the corresponding amines, amides, and nitriles.
Journal ArticleDOI
Catalytic methods for the manufacturing of high-production volume chemicals from vegetable oils and fats (review)
TL;DR: The current status of catalytic chemistry and technology for the manufacturing of high production volume chemicals, such as biofuel, higher olefins, and higher fatty alcohols, from the renewable feedstocks-inedible oils and fats is discussed in this article.
Journal ArticleDOI
Valorization of Biomass‐derived Small Oxygenates: Kinetics, Mechanisms and Site Requirements of H2‐involved Hydrogenation and Deoxygenation Pathways over Heterogeneous Catalysts
TL;DR: In this article, the current understanding of heterogeneous HDO catalysis of representative small oxygenates that are present in the bio-crude obtained from thermochemical conversions of biomass raw materials, as the efficient valorization of these presently underutilized carbon sources would significantly improve carbon recovery and the overall process techno-economics, in addition to facilitating downstream processing in some cases.
Journal ArticleDOI
Hydroconversion of methyl laurate over beta-zeolite-supported Ni–Mo catalysts: Effect of acid and base treatments of beta zeolite
Hiroyuki Imai,Miku Abe,Kazusa Terasaka,Hiroshi Yamazaki,Ryota Osuga,Junko N. Kondo,Toshiyuki Yokoi +6 more
TL;DR: In this article, a NiMo/HBeta was developed and applied to the hydroconversion of methyl laurate under a hydrogen pressure of 0.4 MPa.
Journal ArticleDOI
Highly selective Co3O4/silica-alumina catalytic system for deoxygenation of triglyceride-based feedstock
Vineet Kumar Soni,Vineet Kumar Soni,Suman Dhara,Suman Dhara,R. Krishnapriya,Ganpat Choudhary,Pragati R. Sharma,Rakesh Sharma +7 more
TL;DR: In this paper, the second generation biodiesel by selective deoxygenation possesses a higher cetane number, lower cloud point, and higher oxidation stability compared to the fatty acid ester-based biodiesel, and therefore, can be fed directly to the current diesel engines.
References
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Journal ArticleDOI
Heterogeneous Catalytic Deoxygenation of Stearic Acid for Production of Biodiesel
TL;DR: In this article, a novel method for production of diesel-like hydrocarbons via catalytic deoxygenation of fatty acid is discussed, where the model compound stearic acid is deoxgenated to heptadecane.