Could the experts provide a detailed explanation of the impact of the degree of catalytic cracking reaction on the product distribution and quality?

The degree of reaction is reflected by the conversion rate; at first, there is an increase in gasoline, diesel, rich gas, and coke. Subsequently, the amount of gasoline decreases during the reaction. In terms of operation, it is necessary to raise the bed temperature of the reaction system, which in turn increases the reaction temperature and pressure. The load on the distillation tower increases, and temperatures in all sections tend to rise. It is important to adjust the operations accordingly. The absorption tower, stripping tower, and stabilization tower also need to be adjusted promptly due to the increased amount of rich gas. As the degree of reaction increases, there is more dry gas and coke produced. The amount of gasoline increases at first but then decreases as the reaction progresses; meanwhile, the amount of diesel decreases. The amount of intermediate products used for reprocessing, as well as the reprocessed oil slurry, also decreases, resulting in an overall decline in the liquid yield