硫化物对裂解C9一段加氢Ni/Al2O3催化剂加氢活性的影响  

Effect of sulfide on hydrogenation activity of Ni/Al2O3 catalyst for the first stage hydrogenation of cracked C9

作　　者：张孔远 朱玉磊 刘赟 郭宇栋 刘晨光 Zhang Kongyuan;Zhu Yulei;Liu Yun;Guo Yudong;Liu Chenguang(College of Chemical Engineering,China University of Petroleum(Huadong),Qingdao Shandong 266580,China)

机构地区：[1]中国石油大学(华东)化工学院,山东青岛266580

出　　处：《石油化工》2020年第10期939-945,共7页Petrochemical Technology

摘　　要：在固定床反应装置上考察了噻吩、二丙基硫醚和正丁硫醇对裂解C9一段加氢Ni/Al2O3催化剂加氢活性的影响,采用XPS和XRD对催化剂进行了表征,分析了硫化物影响Ni/Al2O3催化剂加氢活性的机理。实验结果表明,在考察的反应条件下,噻吩和二丙基硫醚影响Ni/Al2O3催化剂加氢活性的原因是硫化物吸附在催化剂的活性中心,占据了加氢活性位,降低了反应分子与催化剂活性位的接触机会;正丁硫醇影响Ni/Al2O3催化剂加氢活性的原因是活性金属Ni与正丁硫醇分解生成的H2S反应生成硫化镍,催化剂的加氢活性相变为硫化态,同时正丁硫醇和生成的硫醚类硫化物吸附在催化剂的活性中心,占据了加氢活性位,使催化剂活性降低。The effects of thiophene,dipropyl sulfide,and n-butyl mercaptan on the hydrogenation activity of Ni/Al2O3 catalyst for the first stage hydrogenation of cracked C9 were investigated in a fixed bed reactor.The result shows that under the investigated reaction conditions,the reason for thiophene and dipropyl sulfide affected the hydrogenation activity of Ni/Al2O3 catalyst was that they were adsorbed on the active sites of the catalysts,occupying the hydrogenation active sites to reduce the contact chances between the reaction molecules and the active sites of the catalysts,not reacting with the metal nickel of Ni/Al2O3 catalysts to form nickel sulfide.The reason for the influence of n-butyl mercaptan on the hydrogenation activity of Ni/Al2O3 catalysts was that the metal state nickel in the active centers reacted with the H2S generated by the decomposition of n-butyl mercaptan to form nickel sulfide,and the hydrogenation activity components of the catalysts changed into sulfuration state.At the same time,the n-butyl mercaptan and the generated sulfide were adsorbed on the catalysts active sites,occupying the hydrogenation active sites to reduce the contact chances of the dicyclopentadiene resulting in the reduction of the catalyst activities.

关 键 词：裂解C9 NI/AL2O3催化剂 硫化物 失活机理 

分 类 号：TQ426.8[化学工程]