![]() ![]() ![]() Finally, n-alkanes can undergo further reactions (hydroisomerization) that are required to produce branched hydrocarbons with lower pour and cloud points (valuable for jet fuel and/or winter-diesel). Interestingly, unlike hydrogenation/dehydration, decarbonylation/ decarboxylation achieves oxygen removal without the consumption of hydrogen. Next free fatty acids undergo oxygen removal by two different pathways: (1) consecutive cycles of hydrogenation and dehydration to yield n-alkanes of corresponding parent fatty acids (2) decarbonylation/decarboxylation that produces a linear alkane with n-1 carbon atoms and the release of CO x species. Hydrotreating of triglycerides to green hydrocarbons proceeds through the hydrogenolysis of the C-O bonds forming the trichain structure of the related free-fatty acids along with propane. Hydrotreating is a reductive deoxygenation method of triglycerides in vegetable oils at high hydrogen pressures (50–100 bar) and moderate temperatures using supported metal catalysts. Liquid alkanes produced in hydrotreating methods are suitable for diesel and jet fuel utilization. Hydrotreating of vegetable oils and related feedstocks is an alternative to the transesterification with methanol which overcomes the limitation of FAMEs in terms of oxidative stability, solvency, energy density, distillation curve, density, H 2O solubility, and corrosion during transportation. Hakim Siddiki, Abeda Sultana Touchy, in Advanced Functional Solid Catalysts for Biomass Valorization, 2020 3.1.2 Hydrotreating of bio-oils and related feedstocks to liquid fuels ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |