| 摘要 |
With an aim to optimize propylene production, petroleum oil such as gas o il is catalytically cracked by contacting the oil with catalyst mixture cons isting of a base cracking catalyst containing an stable Y-type zeolite and s mall amounts of rare-earth metal oxide, and an additive containing a shape-s elective zeolite, in a down-flow type fluid catalytic cracking apparatus hav ing a regeneration zone, a separation zone, and a stripping zone, wherein co nversion of hydrocarbon occurs under relatively severe conditions. According to this fluid catalytic cracking process, the production of light-fraction olefins such as propylene is maximized by applying appropriate process contr ol, monitoring, and optimizing systems. Process model and historical data to test a predictive system can provide early warning of potential performance degradation and equipment failure in the FCC unit. |
