不同分子筛上1-己烯骨架异构化反应性能的研究  

A comparison of different zeolites in their catalytic performance in the skeletal isomerization of 1-hexene

作　　者：曹中扬 黄星亮[1] 龚艳[1] 字琴 代小平[1] 彭文宇 高玥 CAO Zhong-yang;HUANG Xing-liang;GONG Yan;ZI Qin;DAI Xiao-ping;PENG Wen-yu;GAO Yue(College of Chemical Engineering,China University of Petroleum（Beijing）,Beijing 102249,China)

机构地区：[1]中国石油大学(北京)化学工程学院,北京102249

出　　处：《燃料化学学报》2018年第7期848-855,共8页Journal of Fuel Chemistry and Technology

基　　金：国家自然科学基金(21576288)资助~~

摘　　要：以HZSM-35、HZSM-5、HM和Hβ四种分子筛为1-己烯骨架异构化催化剂,比较研究了四种催化剂的异构化性能,对其构效关系进行了关联。结果表明,相比于HZSM-5和Hβ分子筛,HZSM-35和HM具有适宜的酸量,有效孔径为0.4-0.6 nm,而且无晶穴、无交叉孔道,具有良好的择形催化效应,在转化率高达95%的同时,C_(5-)和C_(7+)等副产物的收率在20%左右,异己烯收率可达40%-50%。进一步对四种分子筛进行酸碱改性处理,结果显示,虽然酸性质略有改变,但是一维孔结构的HZSM-35和HM分子筛的异构化性能仍明显优于多维孔结构的HZSM-5和Hβ分子筛,说明在酸性质一定的前提下,孔结构对异构化反应起关键作用。HZSM-35,HZSM-5,HMand Hβ zeolites were used as the catalysts for the skeletal isomerization of1-hexene; the relationship between their catalytic performance and physicochemical properties was investigated.The results showthat in comparison with HZSM-5 and Hβ,HZSM-35 and HMare provided with suitable acid amount and effective pore size between 0.4-0.6 nm,without bug hole and cross channel; as a result,the later two zeolites exhibit better shape selectivity. With a high conversion of 1-hexene（ 95%）,the by-products such as C5- and C7＋ in the products are about 20% and the yield of iso-hexene reaches 40%-50%. After the acid-base modification treatment,a slight change in the acidity is observed; however,the catalytic performance of onedimensional HZSM-35 and HMzeolites in pore isomerization is still much better than that of HZSM-5 and Hβzeolites with multidimensional pore structure, suggesting that the pore structure plays a key role in the isomerization reaction.

关 键 词：酸碱改性 1-己烯 骨架异构 孔结构 分子筛 

分 类 号：TE65[石油与天然气工程—油气加工工程]