高等学校化学学报 ›› 2011, Vol. 32 ›› Issue (6): 1360.

• 研究论文 • 上一篇    下一篇

完全液相法与溶胶-凝胶法制备Cu-Zn-Al双功能催化剂对浆态床一步法合成二甲醚的催化性能比较

樊金串1,2,黄伟1,吉鹏1   

  1. 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, 
    2. 化学化工学院, 太原  030024
  • 收稿日期:2010-09-02 修回日期:2010-12-15 出版日期:2011-06-10 发布日期:2011-05-10
  • 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)、 国家“九七三”计划项目(批准号:   2005CB221204)和山西省自然科学基金(批准号:   2009011059\|13)资助.

Comparison of Catalytic Performances Between Complete Liquid-phase’s Catalyst and Sol-gel’s Catalyst for Slurry Synthesis Dimethyl Ether

FAN Jin-Chuan1,2, HUANG Wei1*, JI Peng1   

  1. 1.  Key Laboratory of Coal Science and Technology of Ministry of Education and Shanxi Province,
    2.  College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China
  • Received:2010-09-02 Revised:2010-12-15 Online:2011-06-10 Published:2011-05-10
  • Contact: HUANG Wei E-mail:huangwei@tyut.edu.cn
  • Supported by:

    国家自然科学基金(批准号:   20706039, 20471040)、 国家“九七三”计划项目(批准号:   2005CB221204)和山西省自然科学基金(批准号:   2009011059\|13)资助.

摘要: 采用完全液相法和溶胶-凝胶法分别制备了组成完全相同的Cu-Zn-Al双功能催化剂,用XRD、N2吸附、XPS等方法对催化剂的性质进行了表征,考察了催化剂对浆态床一步法合成二甲醚反应的催化性能。结果表明,两种方法制备的Cu基催化剂中Cu组分的物相和表面Cu含量明显不同,而催化剂的织构性质基本相同。完全液相法制备的催化剂具有良好的稳定性和较好的选择性,没有失活现象;反应后催化剂的比表面积和比孔容增大,表面Cu含量增加、Cu/Zn比增大。溶胶凝胶法制备的催化剂有明显的失活现象,平均失活率为1.62 %/d;反应后催化剂的比表面积和比孔容减小,表面Cu含量降低、Cu/Zn比减小,这些可能是导致其失活的原因。

关键词: 完全液相, 溶胶-凝胶, 浆态床, 二甲醚, Cu-Zn-Al催化剂

Abstract: The Cu-Zn-Al bifunctional catalysts were respectively prepared by complete liquid-phase method and sol-gel method. The properties of catalysts were characterized by XRD, N2 adsorption and XPS, and the catalytic performance of catalysts for DME synthesis directly from syngas in a slurry reactor was evaluated. The results show that Cu species and surface Cu content in catalysts have obvious difference, but texture properties are similar. The catalyst prepared by complete liquid-phase method has high selectivity and good stability, and the catalyst specific surface area, pore volume, surface Cu content and Cu/Zn mole ratio increase after reaction. The catalyst prepared by sol-gel method has obvious deactivation, and average deactivation rate is 1.62 %/d. The decrease of specific surface area, pore volume, surface Cu content and Cu/Zn mole ratio after reaction are the reason of catalyst deactivation.

Key words: Complete liquid-phase, Sol-gel, Slurry reactor, Dimethyl ether, Cu-Zn-Al catalyst

TrendMD: