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化学学报
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化学学报 ›› 1998, Vol. 56 ›› Issue (10): 1021-1026. 上一篇    下一篇

研究论文

甲烷部分氧化制合成气Pt-Ni/Al~2O~3催化剂的研究

严前古;高利珍;储伟;于作龙;远松月   

  1. 中国科学院成都有机化学研究所.成都(610041);中国科学院长春应用化学研究 所.长春(130022)
  • 发布日期:1998-10-15

Partial oxidation of methane to syngas over Pt-Ni/Al~2O~3 catalyst

Yan Qiangu;Gao Lizhen;Chu Wei;Yu Zuolong;Yuan Songyue   

  1. Chengdu Inst Organ Chem, CAS.Chengdu(610041);Changchun Inst Appl Chem., CAS.Changchun(130022)
  • Published:1998-10-15

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研究了Ni/Al~2O~3,Pt/Al~2O~3和一系列Pt-Ni/Al~2O~3催化剂对甲烷部分氧化制合成气的催化作用,发现Pt-Ni/Al~2O~3催化剂显示了比Ni/Al~2O~3和Pt/Al~2O~3更高的活性和稳定性。H~2-TPR,CO-TPD,CO~2-TPD,SEM,XPS和XRD等结果证明:Pt和Ni之间存在较强的相互作用,Pt和部分Ni形成固溶体合金并且Pt在催化剂表面富集。Pt和Ni之间的相互作用提高了催化剂的活性和稳定性,甲烷在Pt-Ni/Al~2O~3上的催化部分氧化具有不同于在Pt/Al~2O~3和Ni/Al~2O~3上的反应性能。

关键词: 多金属催化剂, 铂, 镍, 氧化铝, 反应性能, 催化活性, 稳定性, 相互作用, 表征, 合成气

The catalytic partial oxidation of methane to syngas over Ni/Al~2O~3, Pt/Al~2O~3 and a series of Pt-Ni/Al~2O~3 catalysts was investigated. It was found that Pt-Ni/Al~2O~3 catalysts exhibit higher activity and stability than Ni/Al~2O~3 and Pt/Al~2O~3. TPR and TPD methods were used to characterize Pt-Ni bimetallic interactions in the catalysts. A series of Pt-Ni/Al~2O~3 catalysts and unsupported Pt-Ni samples were studied by XRD and XPS. It was found the formation of Pt-Ni alloy in the Pt-Ni/Al~2O~3 catalysts and the enrichment of platinum on the surface of the catalysts. It is concluded that the higher activity and stability of Pt-Ni/Al~2O~3 catalysts were caused by Pt- Ni bimetallic interactions.

Key words: MULTIMETAL REFORMING CATALYST, PLATINUM, NICKEL, ALUMIN IUM OXIDE, REACTION PROPERTIES, CATALYTIC ACTIVITY, STABILITY, INTERACTIONS, CHARACTERIZATION, SYNTHETIC GAS

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