催化学报

催化学报 ›› 2009, Vol. 30 ›› Issue (3): 223-229.

• 研究论文 • 上一篇    下一篇

二甲醚水蒸气重整制氢的ZSM-5和Cu-Zn的复合催化体系

冯冬梅, 左宜赞, 王德峥, 王金福   

  1. 清华大学化学工程系北京市绿色反应工程与工艺重点实验室，北京100084
  • 收稿日期:2009-03-25 出版日期:2009-03-25 发布日期:2012-12-19

Steam Reforming of Dimethyl Ether over Coupled ZSM-5 and Cu-Zn-Based Catalysts

FENG Dongmei, ZUO Yizan, WANG Dezheng, WANG Jinfu*   

  1. Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
  • Received:2009-03-25 Online:2009-03-25 Published:2012-12-19

PDF

2682

被引次数

25

摘要： 二甲醚水蒸气重整制氢反应是燃料电池理想的供氢方式之一. 探讨了二甲醚水蒸气重整过程中的反应与反应、反应与传热的耦合协同效应. 采用二甲醚水解催化剂ZSM-5(硅铝比为25)和甲醇水蒸气重整催化剂(Cu-Zn系列及商用Cu-Zn-Al催化剂)混合制得二甲醚水蒸气重整的复合催化剂. 在固定床反应装置中评价了催化剂活性并对催化剂进行了透射电镜、X射线衍射及N2吸附表征. 结果表明, 复合催化剂的活性除了受催化剂组成和铜含量的影响外, 还与Al和Zr的量有关. 在Cu:Zn摩尔比为60:30时, Al和Zr的同时加入使催化剂中Cu晶粒分散最好, 催化剂具有较高的低温活性, 二甲醚在空速为4 922 ml/(g•h)和260 °C下的转化率达到72%.

关键词: 二甲醚, 水蒸气重整, 制氢, 酸性催化剂, 铜基催化剂

Abstract: Cu-Zn-based catalysts were prepared by a novel co- precipitation procedure. Physical mixtures containing a Cu-Zn-based catalyst and ZSM-5 catalyst to couple DME hydrolysis and methanol steam reforming were used to examine the synergistic effects on DME steam reforming. The activity and selectivity were influenced by the catalyst composition and copper content, and also the content of Al and Zr.

Key words: dimethyl ether, steam reforming, hydrogen production, acid catalyst, copper catalyst