Primary Study On Catalytic Conversion Of Vegetable Oils To Propylene

Vegetable oil is one kind of clean and renewable resources which containslittle S and N element. The new technology for catalytic conversion ofvegetable oil to propylene would reduce the dependence on petroleumresource. Both societal and environmental benefit would be notable.In this dissertation, the feasibility for vegetable oil substituting petroleumto produce light olefins, as well as the effects of feed oils, catalysts andreaction conditions on the conversion of vegetable oil were all studied in aconfined fluidized bed reactor. Under optimized operating conditions,propylene yield was 19.52%, and gasoline yield was 30.58%. Gasolinecontained 67.8% aromatic hydrocarbons, 21.47% olefins and a small quantityof alkanes and cycloparaffin hydrocarbons.The enlarging study on blending feed of vegetable oil and petroleumfraction was performed in a Two-Stage Riser. 93.9% of the conversion and18.1% of propylene yield were gotten. These results indicated that propyleneand gasoline with high quality can be effectively produced by catalyticconversion of vegetable oil. Further more, blending vegetable oil andpetroleum fraction as feed oil can insure that the technology realizesindustrial production in existing catalytic cracking.