高等学校化学学报 ›› 2011, Vol. 32 ›› Issue (1): 118.

• 研究论文 • 上一篇    下一篇

硅铝比对完全液相法制备的一步法二甲醚合成催化剂反应性能的影响

黄伟,宋雅君,樊金串,阴丽华   

  1. 太原理工大学煤科学与技术教育部和山西省重点实验室, 太原 030024
  • 收稿日期:2010-05-05 修回日期:2010-11-02 出版日期:2011-01-10 发布日期:2010-12-11
  • 通讯作者: 黄伟 E-mail:huangwei@tyut.edu.cn
  • 基金资助:

    国家自然科学基金(批准号: 20706039, 20471040)和国家“九七三”计划项目(批准号: 2005CB221204)资助.

Effect of Si/Al Ratio on the Performance of Cu-Zn-Si-Al Catalyst Prepared by Complete Liquid\|phase Technology for Dimethyl Ether Synthesis from Syngas

HUANG Wei*, SONG Ya-Jun, FAN Jin-Chuan, YIN Li-Hua   

  1. Key Laboratory of Coal Science and Technology of Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, China
  • Received:2010-05-05 Revised:2010-11-02 Online:2011-01-10 Published:2010-12-11
  • Contact: Wei HUANG E-mail:huangwei@tyut.edu.cn
  • Supported by:

    国家自然科学基金(批准号: 20706039, 20471040)和国家“九七三”计划项目(批准号: 2005CB221204)资助.

摘要: 采用完全液相法制备了不同Si/Al比的浆状一步法二甲醚合成催化剂,在浆态床中对其催化性能进行了测试,通过XRD、NH3-TPD-MS、H2-TPR和XPS对其进行了表征。结果表明,完全液相法制备的催化剂的活性组分Cu主要以低价存在,Cu晶粒大小是影响其活性的主要原因,Si/Al比的变化导致了催化剂的酸强度和酸量的变化,从而影响催化剂的选择性,通过调节Si/Al比可以改善催化剂的稳定性,当Si/Al=1/2时催化剂可获得较好的催化性能。

关键词: 二甲醚, 浆态床, Si/Al, 完全液相法

Abstract: A series of CuZnAlSi bifunctional catalysts with different Si/Al ratio were prepared by a complete liquid phase method and the catalytic performance was evaluated in a slurry reactor. The catalysts were characterized by means of XRD, NH3-TPD-MS, H2-TPR and XPS. The results showed that Cu species was present as low-valence in the catalysts prepared by complete liquid-phase technology. The grain size of Cu had major impact on the catalytic activity. The change of Si/Al ratio led to the change of acid amount and acid strength, thereby influence the selectivity of catalysts. Adjusting the Si / Al ratio can improve the stability of catalysts. When the Si/Al ratio equaled to 1/2, the catalyst can obtain good performance.

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