NiP/Hβ催化正己烷异构化反应性能及机理  

Catalytic Performance and Mechanism of NiP/HβCatalyst in n-Hexane Isomerization

作　　者：张梅[1] 刘咸尚 段尊斌 朱丽君[1] 夏道宏[1] ZHANG Mei;LIU Xianshang;DUAN Zunbin;ZHU Lijun;XIA Daohong(College of Chemical Engineering,State Key Laboratory of Heavy Oil Processing,China University of Petroleum,Qingdao 266580,China)

机构地区：[1]中国石油大学(华东)重质油国家重点实验室化学工程学院,山东青岛266580

出　　处：《石油学报（石油加工）》2021年第4期866-874,共9页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：国家自然科学基金项目(U1662115)资助。

摘　　要：以氯化镍为镍源,次磷酸钠为磷源,合成活性组分NiP,再通过干混法制备出正己烷异构化新型催化剂NiP/Hβ;采用XRD、FT-IR、NH_(3)-TPD以及H_(2)-TPR等手段分析该催化剂的表面性质及NiP在载体上的分散程度。在温度为280℃、正己烷质量空速为1 h^(-1)、氢压为2 MPa、氢/油摩尔比为3条件下,考察了4%NiP/Hβ催化正己烷异构化反应的活性及稳定性。结果表明,正己烷转化率超过80%,异构烷烃收率70%左右、选择性可维持在90%。另外,剖析了NiP/Hβ催化正己烷异构化机理。The active component NiP was synthesized using nickel chloride as the nickel source and sodium phosphite as the phosphorus source,respectively,and a novel isomerization catalyst NiP/Hβwas prepared by the mixing method and used in the isomerization of n-hexane.The properties of catalyst are measured by XRD,FT-IR,NH_(3)-TPD,H_(2)-TPR and other related methods.When the reaction temperature,H_(2)pressure,mass space velocity and hydrogen/oil molar ratio are of 280℃,2.0 MPa,1.0 h^(-1)and 3.0 in the isomerization of n-hexane,the conversion of n-hexane is over 80%,and the yield and selectivity of isomer is about 70%and 90%,respectively.Meanwhile,the catalytic reaction mechanism of n-hexane isomerization over NiP/Hβcatalyst was proposed.

关 键 词：正己烷异构化 NiP晶体 催化性能 异构化机理 

分 类 号：TE62[石油与天然气工程—油气加工工程]