关键词: 丙烷脱氢, 催化剂, 反应温度, 空速, 载气, 产物分布, 再生性能

Abstract: Propane dehydrogenation to propylene reaction and regeneration process were studied with refinery propane gas. The effects of reaction temperature, space velocity and carrier gas on propane dehydrogenation reaction were investigated in pilot plant. The regeneration performance of catalyst was investigated, the regeneration conditions were optimized, and the reasons for catalyst deactivation were analyzed. The results show that with the increase of reaction temperature and the decrease of space velocity, the propane conversion increases, but the selectivity decreases. Under the conditions of 600 ℃ and 400 h^-1 space velocity of propane, the conversion of propane is 43.41%, the selectivity of propylene is 81.29%, and the yield of propylene is more than 35.29%. After six times of regeneration, the performance of the catalyst remains stable, and refinery propane gas will not cause catalyst poisoning,The main reason of catalyst deactivation is carbon deposition. The performance of deactivated catalyst can be recovered after 0.5 h carbon burning at 550~580 ℃.

Key words: propane dehydrogenation, catalyst, reaction temperature, space velocity, carrier gas, product distribution, regeneration performance