催化学报

催化学报 ›› 2011, Vol. 32 ›› Issue (2): 309-314.DOI: 10.3724/SP.J.1088.2011.00909

• 研究论文 • 上一篇    下一篇

La 和 Mn 助剂对完全液相法制备的 CuZr 浆状催化剂结构和性能的影响

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   

  1. 高志华, 黄 伟, 阴丽华, 谢克昌
  • 收稿日期:2010-09-10 修回日期:2010-10-28 出版日期:2011-01-26 发布日期:2014-06-25

Effect of La and Mn Promoters on Structure and Performance of CuZr Catalyst Prepared by Complete Liquid-Phase Technology

GAO Zhihua, HUANG Wei*, YIN Lihua, XIE Kechang   

  1. Key Laboratory of Coal Science and Technology of Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
  • Received:2010-09-10 Revised:2010-10-28 Online:2011-01-26 Published:2014-06-25

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755

被引次数

18

摘要： 利用完全液相法分别制备了 CuZr 和 La, Mn 促进的 CuZr 浆状催化剂, 考察了催化剂在合成气一步合成二甲醚反应中的催化性能, 并采用 NH3 程序升温脱附、X 射线粉末衍射、N2 吸附-脱附、X 射线光电子能谱和程序升温还原等对其进行了表征. 结果表明, 在利用完全液相法制备的 La-Mn-CuZr 催化剂中, La 和 Mn 的加入可促进催化剂活性组分的分散, 提高了催化剂的比表面积和 ZrO2 的表面缺陷, 增加了高分散 CuO 和可还原 CuO 数量, 增强 Cu 和 Zr 之间的相互作用, 进而使催化剂活性大幅度提高.

关键词: 完全液相法, 铜, 锆, 浆状催化剂, 镧, 锰, 助剂, 合成气, 二甲醚

Abstract: A CuZr slurry catalyst promoted by La and Mn additives was prepared by complete liquid-phase technology. The performance of the catalyst for direct synthesis of dimethyl ether from syngas was evaluated in a slurry reactor. The catalyst was characterized by NH3 temperature-programmed desorption, powder X-ray diffraction, N2 adsorption-desorption, X-ray photoelectron spectroscopy, and H2 temperature-programmed reduction. The results indicated that the addition of La and Mn promoters to the CuZr slurry catalyst effectively improved the active metal dispersibility and increased the catalyst surface area. The presence of La and Mn also increased the surface vacancy of ZrO2, improved the number of highly dispersed CuO and reducible CuO, and thereby enhanced the interaction between Cu and Zr. Consequently, the catalyst activity was obviously increased.

Key words: complete liquid-phase technology, copper, zirconium, slurry catalyst, lanthanum, manganese, promoter, syngas, dimethyl ether