Co-Processing of Straight Run Gas Oil-Rapeseed Oil Mixture Using Sulfide NiMo Catalyst on Zeolite-Containing Support

Behavior of the sulfide NiMo catalyst on an alumina support containing SAPO-11 silicoaluminophosphate (NiMo/SAP-Al2O3) in the hydroprocessing of a mixture of a straight run gas oil (SRGO) and rapeseed oil (RO) was studied under a pressure of 5.0 MPa and liquid hourly space velocity of 1.5 h(-1). The effect of temperature on the properties of the products produced in the hydroprocessing of a mixture with 30 wt % RO and 70 wt % SRGO in the presence of the NiMo/SAP-Al2O3 catalyst and a double-bed catalytic system containing layer-by-layer loaded Mo/Al2O3 and NiMo/SAP-Al2O3 sulfide catalysts. It was found that the experimental conditions provide a full conversion of oxygen-containing compounds and reduction of the content of sulfur to less than 10 mg kg(-1). Raising the temperature from 330 to 380 degrees C leads to an increase in the conversion of alkanes formed due to the hydrodeoxygenation of rapeseed oil and to lowering of the cloud point of the hydroprocessing products by approximately 15 degrees. Possible reasons for the differences in behavior between the systems under study: a high conversion of C-17, C-18 alkanes is reached in the presence of the NiMo/SAP-Al2O3 catalyst, whereas the double layer Mo/Al2O3 + NiMo/SAP-Al2O3 system provides a more effective course of the reactions in which aromatic hydrocarbons are hydrogenated.