Optimization and Control of a Stabilization Column\nfor a Propylene-Producing Fluid Catalytic Cracking Process

Given the sustained growth in global\npropylene demand, advanced\npropylene catalytic cracking technologies are increasingly sophisticated.\nThis paper enhances the stabilization column for catalytic cracking\nto align with high-productivity propylene catalytic cracking. Optimization\nfocuses on equipment and operating costs, with a comparative analysis\nof different dividing wall column configurations. Results show the\nside-stripper column (SSC) offers the best economic and environmental\nperformance, reducing total annual cost (TAC) by 23.34% and CO<sub>2</sub> emissions by 24.14%. Further energy savings and CO<sub>2</sub> emissions reductions are achieved by recovering waste heat from\nstable gasoline in the SSC process. Compared to the base configuration,\nthe SSC process with heat recovery reduces TAC by 46.26% and CO<sub>2</sub> emissions by 50.88%. Additionally, the SSC process with heat\nrecovery shows excellent dynamic characteristics under feed flow rate\nand composition disturbances, establishing a rational control scheme.