(Fluid catalytic cracking) is one of the most important units and catalytic conversion processes in the world that convert heavy and low-value petroleum materials into lighter and more valuable materials. Today, due to increasing fuel consumption in the world and the need to convert heavy materials to light fuels, the need for this process is felt more than ever. Among the three types of catalytic failure units (fixed bed, mobile bed, fluid bed), fluid bed based technologies are more operationally complex and have special advantages over fixed bed and mobile bed methods.