高等学校化学学报

高等学校化学学报 ›› 1998, Vol. 19 ›› Issue (8): 1300.

• 论文 • 上一篇    下一篇

Pt/Al2O3和Pt/CeO2/Al2O3催化甲烷部分氧化制合成气反应

严前古1, 高利珍1, 远松月2, 于作龙1   

  1. 1. 中国科学院成都有机化学研究所, 成都, 610041;
    2. 中国科学院长春应用化学研究所, 长春, 130022
  • 收稿日期:1997-06-23 出版日期:1998-08-24 发布日期:1998-08-24
  • 通讯作者: 于作龙
  • 作者简介:严前古,男,27岁,博士.
  • 基金资助:

    国家自然科学基金(批准号:29573128)资助课题.

Partial Oxidation of Methane to Syngas over Pt/Al2O3and Pt/CeO2/Al2O3

YAN Qian-Gu1, GAO Li-Zhen1, YUAN Song-Yue2, YU Zuo-Long1   

  1. 1. Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu, 610041;
    2. Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022
  • Received:1997-06-23 Online:1998-08-24 Published:1998-08-24

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摘要： 研究了Pt/Al2O3和Pt/CeO2/Al2O3对甲烷部分氧化制合成气反应的催化活性,发现Pt/CeO2/Al2O3显示了更高的甲烷转化率和合成气选择性.用H2-TPR、H2-TPD、SEM-EDX和XRD等技术对催化剂进行了表征.CeO2和Pt相互作用促进Pt在催化剂表面的分散,抑制Pt在催化剂表面的迁移;降低了催化剂的燃烧活性,提高了催化剂的部分氧化活性和选择性,可避免因催化剂床层局部温度过高而导致催化剂活性下降或失活,提高了催化剂的稳定性.同时,CeO2通过促进水汽变换反应使反应体系迅速达到平衡,提高了催化剂对H2的选择性.

关键词: 甲烷, 催化部分氧化, 合成气, Pt/CeO2/Al2O3

Abstract: The catalytic oxidation of methane to syngas has been carried out over Pt/Al2O3and Pt/CeO2/Al2O3.It was found that the catalysts with ceria exhibit a higher activity and selectivity than those without ceria. The catalysts were characterized by means of TPR, TPD, SEM EDX and XRD. There is a strong interaction between ceria and platinum under the reaction condition, which increase the dispersion of platinum over catalysts, preventing the sinter of the Pt particles. As a result of the synergistic effect between Pt and ceria, the activity of Pt/Al2O3for combustion reaction was suppressed, the activity and selectivity for partial oxidation were improved greatly. Another role of ceria in the catalyst is the enhancing of the WGSR, which leads to the increase of the selectivity of catalyst for hydrogen and accelerating the equilibrium of the reaction.

Key words: Methane, Catalytic partial oxidation, Syngas, Pt/CeO2/Al2O3

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