化学学报 ›› 2004, Vol. 62 ›› Issue (8): 833-838. 上一篇    下一篇

研究简报

THFFER沸石的系列研究Ⅳ.固体酸性及C5烯烃骨架异构化催化性能

周伟正1, 林德昌1,2, 钟鹰1,3, 郭娟1, 王梯1, 龙英才1   

  1. 1. 复旦大学化学系分子催化和新材料实验室, 上海, 200433;
    2. 第二军医大学药学院, 上海, 200433;
    3. 昭通师范高等专科学校, 昭通, 657000
  • 投稿日期:2003-06-23 修回日期:2003-12-31 发布日期:2014-02-18
  • 通讯作者: 龙英才,E-mail:yclong@fudan.edu.cn E-mail:yclong@fudan.edu.cn
  • 基金资助:
    国家自然科学基金(No.20073010)和教育部博士点基金(No.98024613)资助项目.

Studies of THF-FER Zeolite Ⅳ. Acidity and Catalytic Property for Skeletal Isomerization of C5 Olefins

ZHOU Wei-Zheng1, LIN De-Chang1,2, ZHONG Ying1,3, GUO Juan1, WANG Ti1, LONG Ying-Cai1   

  1. 1. Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, Shanghai 200433;
    2. School of Pharmacy, Second Military Medical University, Shanghai 200433;
    3.c Zhaotong Teacher's College, Zhaotong 657000
  • Received:2003-06-23 Revised:2003-12-31 Published:2014-02-18

在四氢呋喃(THF)-Na2O-SiO2-Al2O3-H2O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Brönsted酸位. 1073 K/10 h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,Brönsted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.

关键词: FER沸石, 固体酸性, 烯烃骨架异构化, 红外光谱, NH3-TPD

THF-FER (ferrierite) zeolite was synthesized in the reactant system of tetrahydrofuran (THF)-Na2O-SiO2-Al2O3-H2O. 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 NH3-TPD investigations showed that the strong acid sites of H-FER zeolite, which are beneficial to the skeletal isomerization of olefin, were mainly the Brönsted 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 Brönsted acid sites remained, and only minor terminal silanol groups were generated. Particularly, the framework of H-FER-1 sample was rather perfect with more Brönsted 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 C5 olefin.

Key words: FER zeolite, acidity, skeletal isomerization of olefin, FT-IR, NH3-TPD

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