The role of MnO in Ni/MnO-Al2O3 catalysts for carbon dioxide reforming of methane

被引：82
作者：
Seok, SH
Han, SH
Lee, JS
机构：
[1] Pohang Univ Sci & Technol, Dept Chem Engn, Pohang 790784, South Korea
[2] Korea Inst Sci & Technol, Environm & Proc Technol Div, Seoul 136791, South Korea
来源：
APPLIED CATALYSIS A-GENERAL | 2001年 / 215卷 / 1-2期
关键词：
CO2; reforming; methane; nickel catalysts; manganese; coke deposition;
D O I：
10.1016/S0926-860X(01)00528-2
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Addition of manganese to Ni/Al2O3 improves the stability of the catalyst in CO2 reforming of methane. The role of manganese has been investigated particularly in view of the deposition of unreactive carbon on the catalyst surface. Results of XRD, XANES, TEM and hydrogen chemisorption indicate that the surface of nickel is partly covered ("decorated") by patches of MnOx. Manganese addition also promotes the adsorption of CO2 by forming a reactive carbonate species. Both of these effects appear responsible for the suppression of carbon deposition over Ni/MnO-Al2O3. (C) 2001 Elsevier Science B.V. All rights reserved.
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页码：31 / 38
页数：8
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