催化学报

催化学报 ›› 2008, Vol. 29 ›› Issue (7): 660-664.

• 研究论文 • 上一篇    下一篇

SAPO-34催化剂上反应条件对乙烯转化制丙烯的影响

李金哲1,2,齐越1,刘中民1,刘广宇1,2,常福祥1   

  1. 1 中国科学院大连化学物理研究所, 辽宁大连 116023; 2 中国科学院研究生院, 北京 100049
  • 收稿日期:2008-07-25 出版日期:2008-07-25 发布日期:2012-06-07

Influences of Reaction Conditions on Ethene Conversion to Propene over SAPO-34

LI Jinzhe1,2, QI Yue1, LIU Zhongmin1*, LIU Guangyu1,2, CHANG Fuxiang1   

  1. 1 Dalian Institute of Chemical Physics, The Chinese Academy of Sciences, Dalian 116023, Liaoning, China; 2 Graduate University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2008-07-25 Online:2008-07-25 Published:2012-06-07

PDF

1005

被引次数

28

摘要： 系统研究了反应条件对SAPO-34上乙烯转化制丙烯的影响. 结果表明,提高空速或加大He/C2H4稀释比有利于抑制丙烯二次反应的发生,提高丙烯的选择性. 升高温度导致乙烯转化率下降,甲烷和乙烷的选择性增加; 在相同转化率下,丙烯选择性随温度上升而下降.乙烯在SAPO-34上的转化反应表现出明显的诱导期,且反应条件对诱导期的长短有较大影响.

关键词: SAPO-34分子筛, 乙烯, 丙烯, 积炭, 诱导期

Abstract: Ethene conversion to propene was carried out over SAPO-34. The influences of reaction conditions on the catalytic performance were investigated in detail. It was found that the propene selectivity increased with space velocity. Ethene conversion decreased with reaction temperature, whereas the selectivity for methane and ethane increased. At the same level of ethene conversion the propene selectivity decreased with reaction temperature. An obvious induction period was observed in the ethene conversion over SAPO-34, and it was strongly influenced by the reaction conditions.

Key words: SAPO-34 molecular sieve, ethene, propene, coke deposition, induction period