能源化学(英文版)

能源化学(英文) ›› 2003, Vol. 12 ›› Issue (1): 17-22.

• Articles • 上一篇    下一篇

CO2 Reforming of CH4 over Nickel and Cobalt Catalysts Prepared from La-Based Perovskite Precursors

Jianjun Guo, Hui Lou, Yinghong Zhu, Xiaoming Zheng   

  1. Institute of Catalysis, Zhejiang University, Hangzhou 310028, China
  • 出版日期:2003-03-30 发布日期:2003-03-30

CO2 Reforming of CH4 over Nickel and Cobalt Catalysts Prepared from La-Based Perovskite Precursors

Jianjun Guo, Hui Lou, Yinghong Zhu, Xiaoming Zheng   

  • Online:2003-03-30 Published:2003-03-30

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摘要： Four perovskite-type complex oxides (LaNiO3, La2NiO4, LaCoO3 and La2CoO4) were successfully prepared using two sol-gel methods, the Pechini method (PC) and the citric acid complexing method (CC). The catalysts were characterized by XRD and TPR. After reduction, the activity of the catalysts in the CO2 reforming of methane was tested. Ni-based catalysts from La2NiO4 precursors were the most active and stable catalyst after calcination above 850oC, which gave a methane conversion of 0.025 mmol/(g.s) for those prepared by the PC method and 0.020 mmol/(g.s) by the CC method. It was proposed that the well-defined structure and lower reducibility is responsible for the unusual catalytic behavior observed over the pre-reduced La2NiO4 catalyst.

关键词: carbon dioxide reforming, methane, syngas, perovskite oxide, sol-gel preparation, nickel

Abstract: Four perovskite-type complex oxides (LaNiO3, La2NiO4, LaCoO3 and La2CoO4) were successfully prepared using two sol-gel methods, the Pechini method (PC) and the citric acid complexing method (CC). The catalysts were characterized by XRD and TPR. After reduction, the activity of the catalysts in the CO2 reforming of methane was tested. Ni-based catalysts from La2NiO4 precursors were the most active and stable catalyst after calcination above 850oC, which gave a methane conversion of 0.025 mmol/(g.s) for those prepared by the PC method and 0.020 mmol/(g.s) by the CC method. It was proposed that the well-defined structure and lower reducibility is responsible for the unusual catalytic behavior observed over the pre-reduced La2NiO4 catalyst.

Key words: carbon dioxide reforming, methane, syngas, perovskite oxide, sol-gel preparation, nickel