应用化学 ›› 1995, Vol. 0 ›› Issue (6): 21-24.

• 研究论文 • 上一篇    下一篇

氧化物对Hβ沸石催化行为的影响

王延吉, 唐靖, 李赫   

  1. 南开大学化学系, 天津 300071
  • 收稿日期:1995-02-06 修回日期:1995-05-30 出版日期:1995-12-10 发布日期:1995-12-10
  • 基金资助:
    中国博士后科学基金资助课题

Study on Catalytic Behavior of Hβ Zeolite Modified by Oxides

Wang Yanji, Tang Jing, Li Hexuan   

  1. Department of Chemistry, Nankai University, Tianjin 300071
  • Received:1995-02-06 Revised:1995-05-30 Published:1995-12-10 Online:1995-12-10

摘要: 用XRD、XPS、NH3-TPD、FT-IR及化学吸附等手段研究了负载B2O3、Fe2O3等氧化物对Hβ沸石表面酸性和丙烯醚化反应性能的影响.结果表明:负载的B2O3、Fe2O3与Hβ-Al2O3沸石间有较强的相互作用,B和Fe的化学环境有明显改变;氧化物调变了Hβ-Al2O3沸石的酸性,使总酸量增加,强酸中心强度下降,L酸中心比例提高;氧化物使丙烯醚化反应活性增强,抑制了异丙醇脱水反应;丙烯转化率与催化剂表面L酸量存在很好的对应关系.

关键词: 氧化物, Hβ沸石, 丙烯醚化, 表面酸性

Abstract: The effect of B2O3 and Fe2O3 on the surface acidity and propylene etherificationwith isopropanol to isopropyl ether has been investigated by XRD, XPS,NH3-TPD, FT-IR and chemisorption.These impregnated oxides played a great role in modifying the total surface acid amount and distribution of acid strength.The stronger interaction between oxidesand Hβ-Al2O3 enhanced the L acid amount.Meanwhile,the performance of propylene etheri-fication was obviously improved.A good relationship between propylene conversion and surface L acid amount was detected.

Key words: oxide, Hβ-zeolite, propylene etherification, surface acidity