催化学报

催化学报 ›› 2007, Vol. 28 ›› Issue (9): 758-760.

• 研究快讯 • 上一篇    下一篇

微通道反应器内"就地"合成沸石膜催化层及其性能

蔡红丽1,张雄福1,刘海鸥1,杨经伦2   

  1. 1 大连理工大学化工学院精细化工国家重点实验室, 辽宁大连 116012; 2 香港科技大学化学工程系, 香港九龙
  • 收稿日期:2007-09-25 出版日期:2007-09-25 发布日期:2011-09-28

Preparation and Catalytic Performance of Zeolite Layer in Microchannels of a Microreactor by an on-Site Flow Synthesis Method

CAI Hongli1, ZHANG Xiongfu1*, LIU Haiou1, YEUNG King Lun2   

  1. 1 School of Chemical Engineering, State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116012, Liaoning, China; 2 Department of Chemical Engineering, Hong Kong University of Science and Technology, Kowloon, Hong Kong, China
  • Received:2007-09-25 Online:2007-09-25 Published:2011-09-28

PDF

1056

被引次数

10

摘要： 采用简单、新颖的沸石粒子引入方法,将NaX沸石晶种引入不锈钢微反应器的微通道内,并用流动法"就地"直接在微通道内通过沸石生长形成NaX沸石膜层,经铯离子交换处理成为CsNaX催化层,用苯甲醛和氰基乙酸乙酯的Knoevenagel缩合反应评价了该催化层的催化性能. 结果表明,微通道内形成的沸石膜层连续,均匀,具有良好的催化功能. 微反应器内缩合反应的结果明显优于传统反应器.

关键词: 微反应器, NaX沸石, 沸石膜, 涂层, Knoevenagel缩合反应

Abstract: A zeolite-based microreactor was fabricated and tested for Knoevenagel condensation between benzaldehyde and ethylcyanoacetate with a continuous CsNaX zeolite layer as the catalyst, which was prepared within the microreactor channel using a novel flow method. The method involved two-step procedures in which NaX zeolite seeds for the growth of zeolite layer were introduced onto the internal surface of the microchannel by using a seeding technique and then grew into a zeolite layer by an on-site flow hydrothermal treatment followed by ion-exchange with 0.5 mol/L CsNO3 solution. The zeolite-based microreactor showed higher catalytic activity for the reaction compared with the conventional batch reactor.

Key words: microreactor, NaX zeolite, zeolite membrane, coating, Knoevenagel condensation