ZrO2晶相形式对Ni-B/ZrO2催化剂CO选择性甲烷化性能的影响（英文）

被引：7

作者：

刘其海 ^{[1
]}

廖列文 ^{[1
]}

刘自力 ^{[2
]}

董新法 ^{[3
]}

机构：

[1] School of Chemistry and Chemical Engineering,ZhongKai University of Agriculture and Engineering

[2] School of Chemistry and Chemical Engineering,Guangzhou University

[3] School of Chemistry and Chemical Engineering,South China University of Technology

来源：

Chinese Journal of Chemical Engineering | 2011年 / 19卷 / 03期

关键词：

crystalline phase; carbon monoxide; selective methanation; Ni-B/ZrO2; catalyst;

D O I：

暂无

中图分类号：

O643.32 [催化反应];

学科分类号：

081705 ;

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.

引用

页码：434 / 438

页数：5

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[2]

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