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
Green and renewable bio-diesel produce from oil hydrodeoxygenation: Strategies for catalyst development and mechanism
TL;DR: In this article, the status and reaction system of oil catalytic hydrodeoxygenation (HDO) conversion in recent years are reviewed, and the catalytic performances of the corresponding catalyst in the oil HDO reaction is described in detail.
Journal ArticleDOI
Deoxygenation of Waste Chicken Fats to Green Diesel over Ni/Al2O3: Effect of Water and Free Fatty Acid Content
TL;DR: The deoxygenation of waste chicken fat containing a high degree of free fatty acids (FFAs) and water has been implemented to produce a green diesel, known as bio-hydrogenated diesel (BHD) as discussed by the authors.
Journal ArticleDOI
Overview on catalytic deoxygenation for biofuel synthesis using metal oxide supported catalysts
Xian Yih Ooi,Wei Gao,Hwai Chyuan Ong,Hwei Voon Lee,Joon Ching Juan,Wei Hsin Chen,Keat Teong Lee +6 more
TL;DR: In this paper, the use of selected metal oxide supported catalyst for biofuel conversion in deoxygenation process is discussed and the synthesis method of Al2O3-TiO2 is comprehensively discussed.
Journal ArticleDOI
Modified mesoporous HMS supported Ni for deoxygenation of triolein into hydrocarbon-biofuel production
Suraya Zulkepli,Joon Ching Juan,Hwei Voon Lee,Noor Saadah Abd. Rahman,Pau Loke Show,Eng-Poh Ng +5 more
TL;DR: In this article, a series of modified hexagonal mesoporous silica (HMS) supported by various Ni loading (5,wt% Ni, 10,wt%, 10.5%, 40,wt., and 100) have been synthesized and systematically characterized.
Journal ArticleDOI
Enhanced photocatalytic alkane production from fatty acid decarboxylation via inhibition of radical oligomerization
Zhipeng Huang,Zhipeng Huang,Zhitong Zhao,Zhitong Zhao,Chaofeng Zhang,Jianmin Lu,Huifang Liu,Nengchao Luo,Nengchao Luo,Jian Zhang,Feng Wang +10 more
TL;DR: It is demonstrated that photogenerated radicals can be rapidly terminated by surface hydrogen species during photocatalytic decarboxylation of fatty acids on a hydrogen-rich surface that is constructed by the interactions between H 2 and Pt/TiO 2 catalyst, thereby greatly inhibiting oligomerization.
References
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Journal ArticleDOI
Jatropha bio-diesel production and use
TL;DR: In this paper, the authors present an overview of the currently available information on the different process steps of the production process of bio-diesel from JCL, being cultivation and production of seeds, extraction of the oil, conversion to and the use of the biodiesel and the by-products.
Journal ArticleDOI
Biodiesel fuels from vegetable oils via catalytic and non-catalytic supercritical alcohol transesterifications and other methods: a survey
TL;DR: The main factors affecting transesterification are the molar ratio of glycerides to alcohol, catalyst, reaction temperature and pressure, reaction time and the contents of free fatty acids and water in oils as mentioned in this paper.
Journal ArticleDOI
Importance of algae oil as a source of biodiesel
Ayhan Demirbas,M. Fatih Demirbas +1 more
TL;DR: Most current research on oil extraction is focused on microalgae to produce biodiesel from algal oil, where algal-oil processes into biodiesel as easily as oil derived from land-based crops.
Journal ArticleDOI
Biodiesel and renewable diesel: A comparison
TL;DR: In this paper, the authors discuss in a general and comparative fashion aspects such as fuel production and energy balance, fuel properties, environmental effects including exhaust emissions and co-products, and what the effect of production scale may be.
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.