模板剂脱除方式对Pt/ZSM-23烷烃异构化性能的影响  

Effects of Detemplation Method on the Catalytic Performance of Pt/ZSM-23 in n-Alkane Isomerization

作　　者：吕广[1,2] 刘忠杉 王从新 马怀军[1] 曲炜[1] 王冬娥[1] 田志坚[1] L Guang;LIU Zhongshan;WANG Congxin;MA Huaijun;QU Wei;WANG Dong’e;TIAN Zhijian(Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,China;University of Chinese Academy of Sciences,Beijing 100049,China;Xinjiang Dushanzi Tianli Industrial Company,Dushanzi 833699,China)

机构地区：[1]中国科学院大连化学物理研究所,辽宁大连116023 [2]中国科学院大学,北京100049 [3]新疆独山子天利实业总公司,新疆独山子833699

出　　处：《石油学报（石油加工）》2018年第4期696-704,共9页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：国家重点研发计划项目(2017YFB306701);国家自然科学基金项目(21406224)资助

摘　　要：以不同温度焙烧的ZSM-23为载体,采用等体积浸渍法、400℃还原制备得到Pt/ZSM-23系列催化剂。采用热重(TG)、N2物理吸附、NH3程序升温脱附(NH3-TPD)、有机元素分析、红外光谱(FT-IR)和吡啶吸附红外光谱(Py-IR)等手段,对分子筛及催化剂进行表征。以正十二烷为模型原料,在固定床反应器上考察了Pt/ZSM-23的临氢异构化性能。结果表明,350℃焙烧脱除部分模板剂后,利用400℃还原过程进一步脱模制得的催化剂表现出最高的异构体收率(87.6%)和多支链异构体收率(41.4%)。探讨了模板剂脱除方式对催化剂孔道性质、酸性质以及异构化性能的影响。A series of ZSM-23 supports were prepared using different calcination temperature.Incipient wetness impregnation method was employed to load Pt on these supports,and then the prepared samples were reduced at 400℃ to obtain the bifunctional catalysts Pt/ZSM-23.TG,N2 adsorption,NH3-TPD,organic element analysis,FT-IR and Py-IR were applied to characterize the supports and catalysts. Hydroisomerization performance of catalysts was evaluated using n-dodecane as model reactant in a fixed bed reactor.The results show that the Pt/ZSM-23 catalyst detemplated by coupling 350℃ calcination and 400℃ reduction displays the highest isomer yield（87.6%）and multibranched isomer yield（41.4%）.The effects of detemplation method on the acidity,texture properties and catalytic performance of bifunctional catalysts are discussed.

关 键 词：异构化 Pt/ZSM-23 模板剂脱除 酸性 孔道性质 

分 类 号：TQ426.95[化学工程]