Vacuum Distillate Catalytic Cracking Technology Modelling: Feedstock and Products Composition and Properties Investigation.

This paper investigates and explains how the feedstock composition affects the catalytic cracking products. For this purpose, at the first stage, the group composition of the catalytic cracking vacuum distillate (297-540°C) and the products of the process (heavy fractions fr. 195-340°C, fr. 340+ºC), the feedstock structural-group composition, as well as the coke structure of coked and regenerated catalysts by TG-DSC. Using a mathematical model, it was found that with an increase in the ratio of saturated hydrocarbons to the sum of aromatics and resins from 1.44 to 3.17 units, the yield of wet gas increases by 1.64, the yield of the gasoline fraction increases by 2.62% wt., the yields of fractions 195-340°C and 340+°C decreases by 1.16 and 1.93% wt respectively. It was shown that feedstock with a high content of saturated hydrocarbons (feedstock No. 4) provides the highest yield of gasoline fraction (45.65 wt%) and wet gas (36.98%). [ABSTRACT FROM AUTHOR]