催化学报

催化学报 ›› 2009, Vol. 30 ›› Issue (11): 1119-1124.

• 研究论文 • 上一篇    下一篇

不同Al源和Zr源对完全液相法制备的Cu-Zn-Al-Zr催化性能的影响

王将永, 黄伟, 高志华, 李俊芳   

  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:2009-11-25 出版日期:2009-11-25 发布日期:2013-07-17

Effect of Different Al and Zr Raw Materials on Catalytic Performance of Cu-Zn-Al-Zr Prepared by Complete Liquid-Phase Technology

WANG Jiangyong, HUANG Wei*, GAO Zhihua, LI Junfang   

  1. Key Laboratory of Coal Science and Technology of Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
  • Received:2009-11-25 Online:2009-11-25 Published:2013-07-17

PDF

852

被引次数

35

摘要： 采用完全液相法, 分别以无机和有机 Al 源和 Zr 源制备了 3 个 Cu-Zn-Al-Zr 浆状催化剂, 并采用 X 射线衍射、X 射线光电子能谱和程序升温还原等手段对催化剂进行了表征, 考察了催化剂在合成气一步法合成二甲醚反应中的催化性能. 结果表明, 不同 Al 源对催化剂的性能有显著影响, 而不同 Zr 源对催化剂性能的影响不大. 以异丙醇铝为原料制备的催化剂的活性明显高于以拟薄水铝石为原料制备的催化剂. 以异丙醇铝为 Al 源制备的催化剂, 其 Cu 组分粒度小、分散性好, Cu-Zr 之间的相互作用较强. Al 源中微量杂质 Na 的存在和 Cu-Zr 之间相互作用的强弱是导致催化剂性能差异的主要原因

关键词: 完全液相法, 铜, 锌, 铝, 锆, 合成气, 二甲醚

Abstract: Cu-Zn-Al-Zr slurry catalyst samples were prepared from different raw materials of Al and Zr by a complete liquid-phase technology and characterized by X-ray diffraction, X-ray photoelectron spectroscopy, and H2 temperature-programmed reduction. The catalytic performance of the samples for the direct synthesis of dimethyl ether from syngas was evaluated in a slurry reactor. The results indicated that different Al raw materials influenced obviously the catalyst performance, while different Zr raw materials had little effect on the catalyst performance. The activity of the catalyst samples with aluminum isopropoxide as the raw material was significantly higher than that with pseudo-boehmite. The catalyst samples with aluminum isopropoxide as the raw material had good Cu dispersion and strong interaction between Cu and Zr. It was concluded that the existence of trace Na in Al raw materials and the strong interaction between Cu and Zr were the main reasons for good catalytic performance.

Key words: complete liquid-phase technology, copper, zinc, aluminum, zirconium, syngas, dimethyl ether