催化学报

催化学报 ›› 2009, Vol. 30 ›› Issue (2): 171-177.

• 研究论文 • 上一篇    

用XPS研究不同方法制备的CuZnAl一步法二甲醚合成催化剂

李志红,黄伟,左志军,宋雅君,谢克昌   

  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, 山西太原 030024
  • 收稿日期:2009-02-25 出版日期:2009-02-25 发布日期:2012-11-21

XPS Study on CuZnAl Catalysts Prepared by Different Methods for Direct Synthesis of Dimethyl Ether

LI Zhihong, HUANG Wei*, ZUO Zhijun, SONG Yajun, XIE Kechang   

  1. Key Laboratory of Coal Science and Technology of Education Ministry and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
  • Received:2009-02-25 Online:2009-02-25 Published:2012-11-21

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814

被引次数

75

摘要： (中文摘要)采用X射线光电子能谱对不同方法制备的CuZnAl二甲醚合成催化剂进行了比较研究. 结果表明,传统方法制备的催化剂表面存在Cu2+, 还原后以Cu+和Cu0共同构成催化反应的活性中心,而完全液相法制备的浆状催化剂表面Cu物种以Cu+形式存在,还原后其表面活性中心主要是Cu0. 在液相还原过程中,完全液相法制备的催化剂表面Cu和Zn组分的分散性同时得到改善,使其在浆态床中的稳定性优于传统方法制备的催化剂.(中文摘要终) (中文关键词)X射线光电子能谱; 机械混合法; 溶胶-凝胶法; 完全液相法; 铜; 锌; 铝; 复合氧化物; 二甲醚(中文关键词终)

关键词: X射线光电子能谱, 机械混合法, 溶胶-凝胶法, 完全液相法, 铜, 锌, 铝, 复合氧化物, 二甲醚

Abstract: CuZnAl catalyst samples prepared by the complete liquid-phase technology (CLT) ha d high stability for synthesis of dimethyl ether in a slurry-bed reactor. The i n vestigation focused on the effect of preparation methods on chemical states of C u a nd Zn species on catalyst surface by X-ray photoelectron spectroscopy. The form i ng surroundings of the catalyst would cause alteration in its surface structure and properties.

Key words: X-rayphotoelectron spectroscopy, mechanical mixing, sol-gel method, complete liquid-phase technology, copper, zinc, aluminum, composite oxide, dimethyl ether