THFFER沸石的系列研究 IV.固体酸性及C_5烯烃骨架异构化催化性能  

Studies of THF-FER Zeolite

作　　者：周伟正[1] 林德昌[1] 钟鹰[1] 郭娟[1] 王梯[1] 龙英才[1] 

机构地区：[1]复旦大学化学系分子催化和新材料实验室,上海200433

出　　处：《化学学报》2004年第8期833-838,共6页Acta Chimica Sinica

基　　金：国家自然科学基金 (No.2 0 0 730 1 0 );教育部博士点基金 (No.980 2 4 61 3)资助项目

摘　　要：在四氢呋喃 (THF) Na2 O SiO2 Al2 O3 H2 O体系中水热合成的THF FER沸石 ,经酸交换 /焙烧或焙烧 /酸交换处理可制得H FER 1和H FER 2两种H型沸石 .红外光谱及NH3 TPD等实验结果表明 ,两者的强酸位主要是对烯烃骨架异构化反应有贡献的Br nsted酸位 .10 73K/10h的高温水蒸汽处理会导致沸石骨架脱铝 ,但并未产生过多的末端硅羟基 .两者比较 ,H FER 1沸石的结构缺陷较少 ,Br nsted酸位较多 ,骨架更完美 .由THF FER沸石制备的H FER催化剂 ,对C5正构烯烃骨架异构化反应显示了优良的催化活性、选择性及稳定性 .THF-FER (ferrierite) zeolite was synthesized in the reactant system of tetrahydrofuran (THF)-Na 2O-SiO 2-Al 2O 3-H 2O. H-FER-1 and H-FER-2 were prepared by two means, ion-exchange/de-template (I) and de-template/ion-exchange (II). The FT-IR and NH 3-TPD investigations showed that the strong acid sites of H-FER zeolite, which are beneficial to the skeletal isomerization of olefin, were mainly the Brnsted acid sites. Aluminium would be removed from the framework when the samples were treated with saturated water vapor at 1073 K for 10 h. However, about 60% of Brnsted acid sites remained, and only minor terminal silanol groups were generated. Particularly, the framework of H-FER-1 sample was rather perfect with more Brnsted acid sites and less defects. The evaluations on the catalysis proved that H-FER zeolites exhibited interesting catalytic performance among activity, stability and selectivity in skeletal isomerization of C 5 olefin.

关 键 词：碳5烯烃骨架 异构化反应 催化性能 固体酸性 THF-FER沸石 四氢呋喃 红外光谱 

分 类 号：O643.3[理学—物理化学]