ITQ-1分子筛催化异戊烯高效二聚反应  

High Efficient Dimerization of Isoamylene over ITQ-1 Zeolite

作　　者：刘平[1] 任忠飞 周磊[1] 周瑜 顾敬 单玉华[1] LIU Ping;REN Zhongfei;ZHOU Lei;ZHOU Yu;GU Jing;SHAN Yuhua(Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology,School of Petrochemical Engineering,Changzhou University,Changzhou 213164,China;State Key Laboratory of Materials-Oriented Chemical Engineering,College of Chemical Engineering,Nanjing Tech University,Nanjing 210009,China;School of Chemistry and Chemical Engineering,Anhui University of Technology,Maanshan 243002,China)

机构地区：[1]常州大学石油化工学院,江苏省绿色催化材料与技术重点实验室,江苏常州213164 [2]南京工业大学化工学院,材料化学工程国家重点实验室,江苏南京210009 [3]安徽工业大学化学与化工学院,安徽马鞍山243002

出　　处：《化学反应工程与工艺》2021年第1期24-29,72,共7页Chemical Reaction Engineering and Technology

基　　金：江苏省精细石油化工重点实验室开放课题(KF1902);江苏省绿色催化材料与技术实验室开放课题(BM2012110)。

摘　　要：轻质烯烃齐聚是生产高质量油品及精细化工原料的有效途径,但实现高选择性催化异戊烯二聚比较困难。本工作筛选了Beta、ZSM-5、丝光沸石(MOR)和ITQ-1四种分子筛,考察其在异戊烯二聚反应中的催化性能,并通过X射线衍射(XRD)、N2-物理吸脱附、氨气程序升温脱附(NH_(3)-TPD)对分子筛催化剂进行了表征。结果显示:影响分子筛催化异戊烯二聚反应性能的因素除酸性位外,孔道结构也起到了很大的作用。其中,ITQ-1表现出较好的异戊烯二聚催化性能,其片层表面拥有丰富的半笼孔穴,有利于异戊烯的吸附及产物分子扩散;其较弱的酸位避免了二聚产物的过度反应。在适宜的反应条件下,ITQ-1分子筛催化异戊烯齐聚的转化率可达73.6%,二聚产物C10的选择性达93.4%,收率达68.7%。Oligomerization of light olefins is an effective way to produce high quality oil and fine chemical raw materials.It is difficult to realize catalytic dimerization of isoamylene with high selectivity.In this work,Beta,ZSM-5,MOR and ITQ-1 zeolites were selected and characterized by X-ray diffraction(XRD),N2 adsorption-desorption,ammonia temperature programmed desorption(NH_(3)-TPD),and the catalytic performances in the dimerization of isoamylene were investigated.The results showed that the pore structure of zeolites played an important role in the catalytic dimerization of isoamylene besides the acid sites.In comparison,ITQ-1 showed the best catalytic performance in the dimerization of isoamylene.Its lamellar surface had abundant half-cages,which was conducive to the adsorption of isoamylene and the diffusion of products,and its weak acid site prevented the overreaction of dimers.Under suitable reaction conditions,73.6%conversion of isoamylene and 93.4%selectivity with 68.7%yield of dimers over ITQ-1 were obtained.

关 键 词：分子筛 轻质烯烃 异戊烯 齐聚 二聚 

分 类 号：TQ032.4[化学工程]