催化学报

催化学报 ›› 2009, Vol. 30 ›› Issue (2): 159-164.

• 研究论文 • 上一篇    下一篇

碱处理法改善Pt/ZSM-5异构化性能

宋月芹1,刘锋1,康承琳1,冯延龙1,周晓龙1,董任遥1,徐龙伢2   

  1. 1 华东理工大学化工学院石油加工研究所, 上海 200237; 2 中国科学院大连化学物理研究所, 辽宁大连 116023
  • 收稿日期:2009-02-25 出版日期:2009-02-25 发布日期:2012-11-21

Alkali Treatment for Improving Isomerization Performance of Pt/ZSM-5

SONG Yueqin1, LIU Feng1, KANG Chenglin1, FENG Yanlong1, ZHOU Xiaolong1*, DONG Renyao1, XU Longya2   

  1. 1 Petroleum Processing Research Center, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China; 2 Dalian Institute of Chemical Physics, The Chinese Academy of Sciences, Dalian 116023, Liaoning, China
  • Received:2009-02-25 Online:2009-02-25 Published:2012-11-21

PDF

857

被引次数

11

摘要： 制备了一系列不同条件下碱处理的ZSM-5样品,以调控其酸性和孔道结构. 考察了酸性和孔道结构对Pt/ZSM-5的异构化性能的影响. 样品的晶相、酸性及结构分别通过X射线衍射、NH3程序升温脱附及N2吸附-脱附表征. 结果表明,缓和的碱处理导致ZSM-5上强酸中心减少,催化剂异构化活性下降; 而苛刻条件下的碱处理使得ZSM-5上强酸中心增加、大量中孔产生及催化剂异构化活性明显提高. 催化剂的异构化活性取决于分子筛上强酸中心的量,与孔道结构无关; 而异构体的分布不仅与孔道结构有关,而且与正己烷转化率密切相关,与分子筛的酸性无关.

关键词: 铂, ZSM-5, 碱处理, 酸性, 孔道结构, 正己烷, 异构化

Abstract: ZSM-5 samples were prepared by alkali treatment under different conditions. The acidity and pore structure o f ZSM-5 had significant effect on n-hexane isomerization performance of P t/ZSM-5. The increase in strong acid sites led to an enhancement in n- hexane conversion. The creation of mesopores was favorable for the formation of dimethyl butane.

Key words: platinum, ZSM-5, alkali treatment, acidity, pore structure, n-hexane, isomerization