中华医学超声杂志

应用化学 ›› 1997, Vol. 0 ›› Issue (4): 70-73.

• 研究论文 • 上一篇    下一篇

稀土氧化物对Ni/α-Al2O3催化甲烷部分氧化制合成气反应的影响

严前古1, 于作龙1, 远松月2   

  1. 1. 中国科学院成都有机化学研究所, 成都;
    2. 中国科学院长春应用化学研究所, 长春 130022
  • 收稿日期:1996-12-30 修回日期:1997-05-07 出版日期:1997-08-10 发布日期:1997-08-10

Effect of Rare Earth Oxides in Ni/α-Al2O3 Catalyzing Partial Oxidation of Methane to Synthesis Gas

Yan Qiangu1, Yu Zuolong1, Yuan Songyue2   

  1. 1. Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu;
    2. Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022
  • Received:1996-12-30 Revised:1997-05-07 Published:1997-08-10 Online:1997-08-10

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摘要： 研究了稀土金属氧化物(La2O3,CeO2,Pr6O11和Nd2O3)对Ni/α-Al2O3催化剂上甲烷部分氧化制合成气反应的影响。X光粉末衍射和活性考察结果表明，稀土氧化物使Ni/α-Al2O3催化剂的稳定性有显着提高。稀土氧化物与活性组份Ni之间的相互作用抑制了催化剂表面Ni晶粒的生长和迁移，由于这种作用也抑制了催化剂表面积炭的生成。在实验中还发现CeO2容易进行Ce3+ Ce4+氧化还原反应而对反应具有催化活性。

关键词: 稀土氧化物, Ni/α－Al2O3, 甲烷, 催化氧化, 合成气

Abstract: Partial oxidation of methane to synthesis gas over Ni/α-Al2O3 promoted with rare earth oxides (La2O3, CeO2, Pr6O11 and Nd2O3) has been investigated by powder X-ray diffraction and XPS. The catalytic activity,size of nickel crystallite, stability and carbon deposition of the catalysts were examined. Addition of rare earth oxide greatly improved the stability of Ni/α-Al2O3 . The SMSI between the active species of Ni and rare earth oxides depresses the growth and the migration of Ni, as well as the carbon deposition on the surface of the catalyst.

Key words: rare earth oxide, Ni/α-Al2O3, methane, catalytic oxidation, synthesis gas

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