催化学报

催化学报 ›› 2010, Vol. 31 ›› Issue (11): 1358-1362.DOI: 10.3724/SP.J.1088.2010.00430

• 研究论文 • 上一篇    下一篇

镍前驱体对非负载型镍催化剂上甲烷分解活性的影响

张微 1,2, 葛庆杰 1, 徐恒泳 1   

  1. 1中国科学院大连化学物理研究所, 辽宁大连 116023; 2中国科学院研究生院, 北京 100049
  • 收稿日期:2010-04-20 出版日期:2010-11-12 发布日期:2014-03-28

Influence of Nickel Precursors on Catalytic Activity of Non-supported Ni for Methane Decomposition

ZHANG Wei1,2, GE Qingjie1,*, XU Hengyong1,*   

  1. 1Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China; 2Graduate University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2010-04-20 Online:2010-11-12 Published:2014-03-28

PDF

1031

被引次数

27

摘要： 分别以硝酸镍和乙酸镍为前驱体, 采用沉淀法制备了非负载型 Ni 催化剂, 运用 X 射线衍射、H2-程序升温还原及 CH4 程序升温表面反应对催化剂进行了表征, 并考察了 Ni 催化剂上 CH4 分解反应活性. 结果表明, 以乙酸镍为前驱体制得的 NiO 样品粒子尺寸较小, 较易被还原, 还原后得到的催化剂催化 CH4 分解活性和稳定性较高; 而以硝酸镍为前驱体制得的 NiO 样品粒子尺寸较大, 较难被还原, 还原后催化剂上 CH4 分解活性和稳定性较低. 制备过程中乙酸镍与溶剂乙二醇所形成的配合物是获得尺寸较小 NiO 样品的关键.

关键词: 硝酸镍, 乙酸镍, 氧化镍, 非负载型催化剂, 甲烷, 分解

Abstract: Non-supported nickel oxide catalyst samples were prepared by precipitation using different nickel precursors. The influence of nickel precursors on catalyst behavior was investigated by X-ray diffraction, H2 temperature-programmed reduction, CH4 temperature-programmed surface reaction, and methane decomposition stability tests. The results showed that the particle size of the NiO sample prepared from a nickel acetate precursor (named NiO-A) was smaller than that of the NiO sample prepared from nickel nitrate (NiO-N). NiO-A could be reduced more easily than NiO-N, and the activity of the reduced NiO-A sample (Ni-A) for methane decomposition was higher than that of the reduced NiO-N sample (Ni-N). The complexation of nickel acetate with glycol was the key factor leading to the smaller NiO particles. The results of the catalytic stability tests showed that the Ni-A catalyst exhibited higher stability than the Ni-N catalyst.

Key words: nickel nitrate, nickel acetate, nickel oxide, non-supported catalyst, methane, decomposition