SCI和EI收录∣中国化工学会会刊

›› 2011, Vol. 19 ›› Issue (3): 434-438.

• CATALYSIS, KINETICS AND REACTORS • Previous Articles     Next Articles

Effect of ZrO2 Crystalline Phase on the Performance of Ni-B/ZrO2 Catalyst for the CO Selective Methanation

LIU Qihai1, LIAO Liewen1, LIU Zili2, DONG Xinfa3   

  1. 1. School of Chemistry and Chemical Engineering, ZhongKai University of Agriculture and Engineering, Guangzhou 510225, China;
    2. School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, China;
    3. School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China
  • Received:2010-12-29 Revised:2011-04-20 Online:2011-06-28 Published:2011-06-28
  • Supported by:
    Supported by the National Natural Science Foundation of China(21076047);the Natural Science Foundation of Zhongkai University of Agriculture and Engineering(G3100026)

Effect of ZrO2 Crystalline Phase on the Performance of Ni-B/ZrO2 Catalyst for the CO Selective Methanation

刘其海1, 廖列文1, 刘自力2, 董新法3   

  1. 1. School of Chemistry and Chemical Engineering, ZhongKai University of Agriculture and Engineering, Guangzhou 510225, China;
    2. School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, China;
    3. School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China
  • 通讯作者: LIU Zili, E-mail: gzdxlzl@163.com
  • 基金资助:
    Supported by the National Natural Science Foundation of China(21076047);the Natural Science Foundation of Zhongkai University of Agriculture and Engineering(G3100026)

Abstract: Amorphous Ni-B/ZrO2 catalysts were prepared by coprecipitation-chemical reduction with KBH4 aqueous solution,and various crystalline phase ZrO2(amorphous-ZrO2,tetragonal-ZrO2 and monoclinic-ZrO2) supported Ni-B catalysts were obtained by thermal treatment in 5%H2-N2 stream at different temperature.The effect of ZrO2 polymorphs and the treatment temperature on the catalytic performance for the CO selective methanation were investigated,and the catalysts were characterized by N2 physisorption,Powder X-ray diffraction(XRD), Temperature-Programmed Desorption(CO-TPD and H2-TPD),and Differential Scanning Calorimeter(DSC).The treatment temperature affected strongly the crystalline structure of ZrO2,and the CO methanation activity and selectivity of the Ni-B/ZrO2 catalysts were significantly influenced by the crystalline phase of ZrO2.Of the three forms of ZrO2 polymorphs(amorphou-ZrO2,tetragonal-ZrO2 and monoclinic-ZrO2),the amorphous-ZrO2 supported nickle catalyst showed highest CO methanation activity,attributing in large part to the largest specific surface area and the optimum CO/H2 absorption intensity of the Ni-B/amorphous-ZrO2 catalyst.

Key words: crystalline phase, carbon monoxide, selective methanation, Ni-B/ZrO2 catalyst

摘要: Amorphous Ni-B/ZrO2 catalysts were prepared by coprecipitation-chemical reduction with KBH4 aqueous solution,and various crystalline phase ZrO2(amorphous-ZrO2,tetragonal-ZrO2 and monoclinic-ZrO2) supported Ni-B catalysts were obtained by thermal treatment in 5%H2-N2 stream at different temperature.The effect of ZrO2 polymorphs and the treatment temperature on the catalytic performance for the CO selective methanation were investigated,and the catalysts were characterized by N2 physisorption,Powder X-ray diffraction(XRD), Temperature-Programmed Desorption(CO-TPD and H2-TPD),and Differential Scanning Calorimeter(DSC).The treatment temperature affected strongly the crystalline structure of ZrO2,and the CO methanation activity and selectivity of the Ni-B/ZrO2 catalysts were significantly influenced by the crystalline phase of ZrO2.Of the three forms of ZrO2 polymorphs(amorphou-ZrO2,tetragonal-ZrO2 and monoclinic-ZrO2),the amorphous-ZrO2 supported nickle catalyst showed highest CO methanation activity,attributing in large part to the largest specific surface area and the optimum CO/H2 absorption intensity of the Ni-B/amorphous-ZrO2 catalyst.

关键词: crystalline phase, carbon monoxide, selective methanation, Ni-B/ZrO2 catalyst