CO-HYDROPROCESSING OF SOYBEAN OIL AND FLUID CATALYTIC CRACKING DIESEL OIL FOR PRODUCING CLEAN DIESEL OIL WITH HIGH CETANE NUMBER

摘要

Hydrogenation of soybean oil on CoMo/γ-Al2O3, NiMoP/γ-Al2O3 and NiMoP/γ-Al2O3-HUSY catalysts was separately investigated in a high pressure fixed bed micro-reactor. Co-hydroprocessing of soybean oil and fluid catalytic cracking (FCC) diesel oil mixed feedstock for production of clean diesel oil with high cetane number on NiMoP/Y-Al2O3-FfUSY catalyst was another topic under observation. For hydrogenation of soybean oil under conditions of pressure 3.0 MPa, temperature 320E, LHSV 2.0 h~(-1) and volume ration of H2 to Oil 500 on CoMo/γ-Al2O3 and NiMoP/γ-Al2O3 catalysts separately, the main product was n-C_(15-18), but on NiMoP/γ-Al2O3-HUSY catalyst containing acidic component with higher cracking ability, the main product of hydrogenation was C_(15)~- . In co-hydroprocessing of mixed feedstock of soybean oil and FCC diesel oil on NiMoP/γ-Al2O3-HUSY catalyst under conditions of pressure 4.0 MPa, temperature 370?, LHSV 1.0 h~(-1), volume ratio of H2 80%. Both are not much lower than the case that FCC diesel oil was individually hydroprocessed, but cetane number of the product noticeably increased by 1.8-6.5.