Research progress on catalysts for the production of green diesel by hydrodeoxidation of lipid
Compared with petrochemical diesel,green diesel produced by oil hydrodeoxidation has advantages of biodegradability,environmental protection and low toxicity.In the research of green diesel,the development of catalyst is very important.In this paper,the mechanism of oil hydrodeoxidation to green diesel oil,various hydrodeoxidation catalysts,catalyst deactivation and regeneration are introduced.Noble metal reserves are scarce,so the price is high,which limits their industrial applications.The hydrogenation of metal sulfide catalyst may lead to sulfur leaching,which deactivates the catalyst and leads to product contamination.Reduced non-noble metal,metal carbide,nitride and phosphide catalysts are widely concerned because of their high cost-effectiveness and pollution-free,but the preparation process is complicated and the catalyst life is short.Therefore,the use of additive modification and different carriers for non-noble metal catalyst,and the development of cheap,efficient,environmentally friendly catalyst are the future development directions.
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