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本工作是在常压脉冲微反装置内,以正戊烷、甲基环戊烷及正己烷为原料,考察铼、硫组元引入铂催化剂内对其性能的影响.试验结果表明:无论是铂铼共载或分载(机械混合法制备的催化剂),反应性能都十分相似.新鲜铂催化剂引入铼后,氢解反应加强,脱氢异构及脱氢环化反应受到抑制.经预硫化后,氢解反应有所抑制,对芳构化反应选择性的影响则随原料而异,正己烷脱氢环化成苯受到抑制,甲基环戊烷脱氢异构生成苯的选择性增强.通过机械混合法,考察到铂铼催化剂中铂硫化比铼硫化对抑制氢解反应起着更为重要的作用.本文还对共浸铂铼催化剂与机械混合铂铼催化剂用TPR和TPT等手段进行了对比.
In this work, n-pentane, methylcyclopentane and n-hexane were used as raw materials to investigate the effect of rhenium and sulfur components introduced into the platinum catalyst on the performance of the atmospheric pressure pulse microreactor.Experimental results show that: Platinum rhenium load or sub-load (mechanical mixing prepared catalyst), the reaction performance is very similar to fresh platinum catalyst introduced rhenium, the hydrogenolysis reaction is enhanced, dehydrogenation isomerization and dehydrocyclization reaction is inhibited by the pre-vulcanization , The hydrogenolysis is inhibited, and the selectivity to aromatization reaction varies with the feedstock. The dehydrogenation of n-hexane to benzene is inhibited and the selectivity of isomerization of methylcyclopentane to benzene is enhanced. Through mechanical mixing method, it was found that the platinum sulfide in the platinum-rhenium catalyst played a more important role than the rhenium sulfide in inhibiting the hydrogenolysis reaction.This paper also carried out on the platinum-rhenium catalyst and the mechanical mixed platinum-rhenium catalyst by means of TPR and TPT Contrast.