能源化学(英文版)

能源化学(英文) ›› 2003, Vol. 12 ›› Issue (2): 105-112.

• Articles • 上一篇    下一篇

Effect of Drying Methods on the Structure and Combustion Activity of Mn-Substituted Hexaaluminate Catalysts

Jinguang Xu, Zhijian Tian, Junwei Wang, Yunpeng Xu, Zhusheng Xu, Liwu Lin   

  1. Laboratory of Natural Gas Utilization and Applied Catalysis, Dalian Institute of Chemical Physics,Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China;
  • 出版日期:2003-06-30 发布日期:2003-06-30

Effect of Drying Methods on the Structure and Combustion Activity of Mn-Substituted Hexaaluminate Catalysts

Jinguang Xu, Zhijian Tian, Junwei Wang, Yunpeng Xu, Zhusheng Xu, Liwu Lin   

  • Online:2003-06-30 Published:2003-06-30

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摘要： Conventional oven drying (COD) and supercritical drying (SCD) methods were applied to the preparation of Mn-substituted hexaaluminate (BaMnAl11O19-a ) catalysts. The effect of drying methods on phase composition, specific surface area, pore structure, reduction behavior of Mn3+ ions, and combustion activity of the samples was investigated. The homogenous mixing of the components in the sol-gel process could be maintained by SCD, and the hexaaluminate phase was almost the only phase of the resulting materials after calcination. H2-TPR revealed that the Mn3+ ions in the sample obtained by SCD were easier to be reduced than that by COD. Moreover, the samples obtained by SCD have higher surface area, narrower pore size distribution, and higher combustion activity than those obtained by COD.

关键词: hexaaluminate, catalytic combustion, methane, supercritical drying

Abstract: Conventional oven drying (COD) and supercritical drying (SCD) methods were applied to the preparation of Mn-substituted hexaaluminate (BaMnAl11O19-a ) catalysts. The effect of drying methods on phase composition, specific surface area, pore structure, reduction behavior of Mn3+ ions, and combustion activity of the samples was investigated. The homogenous mixing of the components in the sol-gel process could be maintained by SCD, and the hexaaluminate phase was almost the only phase of the resulting materials after calcination. H2-TPR revealed that the Mn3+ ions in the sample obtained by SCD were easier to be reduced than that by COD. Moreover, the samples obtained by SCD have higher surface area, narrower pore size distribution, and higher combustion activity than those obtained by COD.

Key words: hexaaluminate, catalytic combustion, methane, supercritical drying