催化学报

催化学报 ›› 2011, Vol. 32 ›› Issue (8): 1400-1404.DOI: 10.3724/SP.J.1088.2011.10405

• 研究论文 • 上一篇    下一篇

载体对合成气制甲烷镍基催化剂性能的影响

李霞, 杨霞珍, 唐浩东, 刘化章*   

  1. 浙江工业大学工业催化研究所, 浙江杭州 310032
  • 收稿日期:2011-04-07 修回日期:2011-05-09 出版日期:2011-08-05 发布日期:2014-12-26

Effect of Supports on Catalytic Performance of Nickel-Based Catalyst for Methanation

LI Xia, YANG Xiazhen, TANG Haodong, LIU Huazhang*   

  1. Institute of Industrial Catalysis, Zhejiang University of Technology, Hangzhou 310032, Zhejiang, China
  • Received:2011-04-07 Revised:2011-05-09 Online:2011-08-05 Published:2014-12-26

PDF

1099

被引次数

89

摘要： 考察了 Al2O3-1, Al2O3-2 和 SiO2 负载的 Ni 基催化剂上合成气制甲烷的反应活性和稳定性. 结果表明, Ni/Al2O3-2 和 Ni/SiO2 催化剂表现出较高的催化活性和稳定性, 而 Ni/Al2O3-1 催化剂稳定性极差. 采用 X 射线衍射、透射电镜、程序升温还原、N2 吸附-脱附和热重分析等技术对催化剂进行了表征. 结果显示, 影响催化剂稳定性的主要因素不是积炭, 而可能是反应过程中载体结构的破坏和 Ni 的迁移聚集.

关键词: 合成气, 甲烷合成, 镍基催化剂, 氧化铝, 氧化硅, 稳定性

Abstract: Catalytic behavior for syngas methanation over nickel-based catalysts with different supports (Al2O3-1, Al2O3-2, and SiO2) was investigated. The results showed that the catalyst prepared by Al2O3-2 or SiO2 support possessed higher activity and stability, while the stability of Ni/Al2O3-1 catalyst was extremely poor. The catalysts were characterized by X-ray powder diffraction, transmission electron microscopy, temperature-programmed reduction, N2 adsorption-desorption, and thermogravimetry. Characterization results showed that carbon deposition is not a key factor in determining the catalyst stability, while the destruction of support structure and the migration and agglomeration of Ni particles during the reaction may be the main reasons for the rapid deactivation of the Ni/Al2O3-1 catalyst.

Key words: syngas, methanation, nickel-based catalyst, alumina, silica, stability