关键词: 丙烷脱氢, 催化剂, 移动床, 铂, 锡, 氧化铝

Abstract: Based on the Pt-Sn-M/Al2O3 system, propane dehydrogenation catalyst PST-100 for moving bed reactor was developed. The effects of promoter M and Cl content on the catalytic performance and coke deposition rate were investigated. The results showed that an appropriate amount of promoter M was helpful to reduce the acidity of the catalyst, especially the amount of medium strong acid, which was able to strengthen the synergistic effect of acid function and metal function, and reduced the coke deposition rate of the catalyst. An appropriate amount of Cl on the catalyst was conducive to the re-dispersion of Pt in the catalyst regeneration process resulting in the improvement of the activity stability. The results of 200 h simulated aging test and multiple regeneration tests showed that PST-100 catalyst had good hydrothermal stability and regeneration performance. The results of commercial application of 4a in a 450 kt/a unit of a company showed that the catalyst had excellent catalytic activity and activity stability.

Key words: propane dehydrogenation, catalyst, moving bed, platinum, tin, alumina