Catalytic Cracking Introduction

The process of cracking oil in the presence of a catalyst is called catalytic cracking. Catalytic cracking is developed from the thermal cracking process. It is developed on the thermal cracking process. It is the most important process operation to improve the depth of crude oil processing and to produce high quality gasoline and diesel fuel. It is the most important process operation to improve the processing depth of crude oil and produce high quality gasoline and diesel fuel.

Components of a catalytic cracking unit：
*A complete catalytic cracking unit is generally composed of the following parts:
*Anti-regeneration system ------ catalyst fluidization regeneration, feedstock reaction to generate products
*Fractionation system ---------- to split the oil and gas into different fractions of products
*Absorption stabilization system --------- separates rich gas and treats crude gasoline
*Product refining system -------- desulfurization to ensure product quality
*Main fan and flue gas energy recovery system - provide air for coking and utilize flue gas energy
*Rich gas compressor system -------- boosts rich gas pressure
*Waste heat recovery system -------- recovers flue gas heat
*Machine pump system ---------- provides logistic power
*Control system ---------- ensures normal process equipment parameters
*Interlock system ---------- ensures the safety of the plant in case of accident

The products from catalytic cracking are fractionated to give gas, gasoline, diesel and heavy distillate. Some of the oil is returned to the reactor for further processing called refinery oil. Catalytic cracked gasoline is stable and has a high octane number, so it is used as a basic component of aviation gasoline and high-octane gasoline.