Abstract:

The ex-situ presulfidation for hydrogenation catalyst was investigated using H₂S and batch reactor with variation in different factors，such as heating rate，quantity of H₂S，proportion of H₂S with H₂，reaction temperature，reaction time，and the partial pressure of inert gas. The effect of presulfidation was evaluated by the sulfur content in catalyst and the bromine value in hydrogenation product. Suitable reaction conditions were found as the heating rate of  2 ℃/min，3 h of reaction at 230 ℃，1∶1 proportion of H₂S with H₂，1 h of final reaction at 340 ℃，in which the quantity of H₂S was 1.3 times of theoretical value and the partial pressure of inert gas was 1.5 MPa. The results indicated that this technology is feasible and the activity of ex-situ presulfidation catalyst using batch reactor is better than that of the in-situ process.

摘要：

利用间歇釜反应器，以H₂S为硫化介质，研究了升温速率、H₂S用量、H₂S和H₂体积比、反应温度、反应时间、惰性气体分压等工艺条件对裂解汽油二段加氢催化剂器外预硫化效果的影响。以硫化度和加氢产品溴价作为硫化效果评价指标，确定适宜的工艺条件为：升温速率2 ℃/min，230 ℃恒温时间3 h，H₂S和H₂配比1∶1，H₂S用量为理论用量的1.3倍，反应终温340 ℃，终温恒温时间1 h，惰性气体分压1.5 MPa。实验结果表明，加氢催化剂间歇釜器外预硫化是可行的，效果优于器内预硫化。