Journal
GREEN CHEMISTRY
Volume 23, Issue 3, Pages 1114-1129Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0gc03707a
Keywords
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Funding
- National Key Research and Development Project [2019YFD1100101]
- National Natural Science Foundation of China [51878095, 22076016]
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This review discusses the advancements in producing diesel-like hydrocarbons through hydrothermal deoxygenation of lipids and fatty acids. It covers the reactions involved, various catalysts used, the impact of reaction conditions, and proposes future research directions in this field.
In recent years, due to the depletion of fossil fuels and environmental problems, the use of non-edible lipids (e.g., waste and microalgal oils) and fatty acids to produce fuels has received much more attention. Most of these lipid materials contain large amounts of water, which makes the hydrothermal process a very attractive method. This review describes the advancements in the preparation of diesel-like hydrocarbons by the deoxygenation of lipid and fatty acid feedstocks under hydrothermal conditions. Firstly, all reactions in the hydrothermal deoxygenation process, e.g. hydrodeoxygenation, decarboxylation, decarbonylation, hydrogenolysis, reforming, etc., are described. Secondly, the activity, selectivity and stability of various catalysts, mainly metal-based catalysts, are discussed. Thirdly, the influence of reaction conditions, i.e. the amount of catalyst, reaction temperature, reaction atmosphere, feedstocks, water, and reactors, is summarized. Finally, the directions of further study on the production of diesel-like hydrocarbons by hydrothermal deoxygenation are proposed.
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