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

摘要： 采用炼油厂丙烷气进行了丙烷脱氢制丙烯反应及再生工艺的研究,在小试评价装置上分别考察反应温度、空速、载气等对丙烷脱氢反应的影响,考察了催化剂的再生性能,优化再生条件,并对催化剂的失活原因进行了分析。研究结果表明:随着反应温度的提高和空速的下降,丙烷转化率不断提高,但选择性逐渐下降;在600 ℃、丙烷空速400 h^-1的条件下,丙烷转化率为43.41%,丙烯选择性为81.29%,丙烯收率大于35.29%;经过6次再生后,催化剂性能保持稳定,炼油厂丙烷气不会造成催化剂中毒,催化剂失活的主要原因是积炭,失活催化剂在550~580 ℃ 经过0.5 h的烧炭即可恢复性能。

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