Mesoporous catalysts for dry reforming of methane: Correlation between structure and deactivation behaviour of Ni-containing catalysts

被引：62
作者：
de Sousa, Helvio Silvester A.
da Silva, Antonio N. [1 ]
Castro, Antonio J. R. [1 ]
Campos, Adriana [2 ]
Filho, Josue M. [1 ]
Oliveira, Alcineia C. [1 ]
机构：
[1] Univ Fed Ceara, Dept Fis, Fortaleza, Ceara, Brazil
[2] CETENE, Recife, PE, Brazil
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2012年 / 37卷 / 17期
关键词：
Raman; TEM; Mesoporous alumina; Dry reforming; Deactivation; NICKEL-CATALYSTS; HYDROGEN-PRODUCTION; SUPPORTED NI; CO2; WATER; CALCINATION; TEMPERATURE; STABILITY; EVOLUTION; ZIRCONIA;
D O I：
10.1016/j.ijhydene.2012.05.151
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：
Mesoporous alumina doped with CeO2, MgO, ZrO2 or La2O3 demonstrated that the solid structure influences on the deactivation behaviour of the catalysts in dry reforming of methane. Ni-containing phases such as CeO2-Al2O3, CeAlO3, MgAl2O4, NiAl2O4, ZrO2-Al2O3 and La2O3-Al2O3 were formed, but did not impede coking on the solids. Only nickel species on a high surface area MgAl2O4 or NiAl2O4 exhibited elevated resistance to physical degradation and enhanced promoting effect to labile carbon formation. In this solid, the NiO nanoparticles included between the MgAl2O4 and NiAl2O4 layer were almost certainly accessible to methane and carbon dioxide molecules and the source supporting for the formation of such amorphous reactive carbon, graphite and carbon nanotubes, as well. Copyright (C) 2012, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：12281 / 12291
页数：11
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