正构烷烃加氢异构化催化剂研究进展  

Research progress of catalysts for hydroisomerization of n-alkanes

作　　者：王文敏 闫伦靖 王美君[1,2] 王宇仙 鲍卫仁[1,2] WANG Wen-min;YAN Lun-jing;WANG Mei-jun;WANG Yu-xian;BAO Wei-ren(State Key Laboratory of Clean and Efficient Coal Utilization,Taiyuan University of Technology,Taiyuan 030024,China;Key Laboratory of Coal Science and Technology(Taiyuan University of Technology),Ministry of Education,Taiyuan 030024,China)

机构地区：[1]太原理工大学省部共建煤基能源清洁高效利用国家重点实验室,山西太原030024 [2]太原理工大学煤科学与技术教育部重点实验室,山西太原030024

出　　处：《应用化工》2022年第11期3314-3318,共5页Applied Chemical Industry

基　　金：国家自然科学基金(22078224)。

摘　　要：介绍了烷烃加氢异构化反应机理,包括分子筛的择形催化和正构烷烃在双功能催化剂上的加氢异构化反应过程。综述了双功能催化剂载体孔道尺寸、晶粒大小、酸强度、酸类型以及金属种类、分散度对烷烃异构化过程的影响。分析表明,选择孔径适宜、具有较高酸含量和酸强度的分子筛可提高异构产物收率,采用适宜方式负载金属得到高分散度且分布均匀的负载金属的分子筛有利于烷烃异构化反应。重点讨论了双功能催化剂金属和酸之间的协同作用——金属中心与酸中心的比例和金属中心与酸中心的距离对烷烃异构化的影响。提出金属中心与酸中心合适的比例和距离是提高双功能催化剂反应活性的关键。The mechanism of hydroisomerization of alkanes was introduced,including the shape selectivity of zeolite and the hydroisomerization reaction process of n-alkanes on bifunctional catalysts.The effects of the characteristics such as pore size,crystal particle size,acid strength,acid type,metal type and dispersion on the isomerization of alkanes were reviewed.The results showed that the yield of isomerization products can be improved by selecting zeolite with appropriate pore size,high acid content and acid strength.The highly dispersed and evenly distributed metals on the bifunctional catalyst are beneficial to the alkane isomerization reaction.The synergistic effect between metal and acid on catalysts,including the ratio of metal center to acid center and the distance between metal center and acid center,was discussed.It was suggested that the appropriate ratio and distance between metal and acid is the key to improving the activity of bifunctional catalysts.

关 键 词：正构烷烃 加氢异构化 双功能催化剂 协同作用 

分 类 号：TQ203.4[化学工程—有机化工] O643.38[理学—物理化学]