Research on Thermal Cracking and Secondary Reactions in Fluid Catalyticcraking Process

Thermal cracking reactions lead to excessive light gas yield and lower overall product values during the present typical high temperature commercial FCC operation. Catalyst properties and operating parameters (reaction temperature, catalyst to oil ratio, contact time) have great influence on thermal and catalytic cracking reactions. The short contact time of oil and catalyst may suppress the detrimental thermal cracking reaction dramatically. A satisfactory result could be obtained through selection of proper catalyst and operating conditions (for example, the very short contact time of gas and oil).