Mechanistic difference of the CO2 reforming of CH4 over unsupported and zirconia supported molybdenum carbide catalysts

被引：44

作者：

Naito, S ^{[1
]}

Tsuji, M ^{[1
]}

Miyao, T ^{[1
]}

机构：

[1] Kanagawa Univ, Fac Engn, Dept Appl Chem, Kanagawa Ku, Yokohama, Kanagawa 2218686, Japan

来源：

CATALYSIS TODAY | 2002年 / 77卷 / 03期

关键词：

methane; CO2; reforming; molybdenum carbide; zirconium oxide; deactivation;

D O I：

10.1016/S0920-5861(02)00242-0

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Zirconia supported molybdenum carbide catalysts exhibited much higher activity for CH4-CO2 reaction than unsupported Mo2C. By lowering the loading amount on ZrO2, deactivation was suppressed completely under the reaction condition of higher CH4/CO2 ratios and excellent activity was maintained. Transmission electron microscopic observation as well as XPS analysis demonstrated that molybdenum carbide was highly dispersed on ZrO2 with strong electronic interaction. Isotopic exchange reaction between CH4 and CD4 showed that the dissociation of methane was significantly retarded by supporting Mo2C on ZrO2, which could be the main reason of high activity and durability of supported catalysts. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：161 / 165

页数：5

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