关键词: 丙烷脱氢, 催化剂, 移动床, 丙烯

Abstract: Accurately controlling the operating parameters of the mobile bed propane dehydrogenation reaction system is the foundation for the catalyst to exert its reaction performance and ensure the long-term high production capacity operation of the device. Based on the calibration and operation data of the Oleflex process propane dehydrogenation unit of a certain company, it was found that reasonable control of the reaction temperature can achieve a suitable equilibrium value for the reaction capacity. Further increasing the reaction temperature can increase the propylene production capacity, but the technical and economic rationality needs to be comprehensively considered; Under conditions where the device has sufficient regeneration capacity and the reaction effluent compressor (REC) allows, reducing the reaction pressure can improve the conversion rate and selectivity of the reaction; Under high production capacity conditions, the volumetric air velocity of the feed should be carefully adjusted. When adjusting the feed flow rate beyond 100% of the design load, it is necessary to fully evaluate the risks of creating "cavities" and "wall sticking" issues.Reducing the hydrogen to hydrocarbon ratio is an effective measure to improve the conversion rate and selectivity of propane dehydrogenation, but it will increase the amount of catalyst coke deposition. A balance should be found between improving the selectivity of propane dehydrogenation reaction, the performance of the circulating hydrogen compressor, and catalyst coke deposition.

Key words: propane dehydrogenation, catalyst, moving bed, propylene