Characterization of Ca-promoted Ni/α-Al2O3 catalyst for CH4 reforming with CO2

被引：275
|
作者：
Hou, ZY [1 ]
Yokota, O [1 ]
Tanaka, T [1 ]
Yashima, T [1 ]
机构：
[1] RITE, Chem Res Grp, Kyoto 6190292, Japan
来源：
APPLIED CATALYSIS A-GENERAL | 2003年 / 253卷 / 02期
关键词：
methane; dry reforming; Ni; Ca-promoted;
D O I：
10.1016/S0926-860X(03)00543-X
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：
In CH4 dry reforming, the influence of Ca on the activity of supported Ni catalyst depended on the properties of the supports (SiO2, alpha-AlO3, gamma-Al2O3) and on the amount of Ca added. Small amounts of Ca increased the activity and stability of Ni/alpha-Al2O3. Temperature-programmed reduction with H-2 (H-TPR), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) characterizations of Ca-promoted Ni/alpha-Al2O3 catalysts indicated that Ca improved the dispersion of Ni, strengthened the interaction between Ni and Al2O3, and retarded the sintering. A higher amount of Ca covered the surface of alpha-Al2O3 and enhanced the decomposition of CH4. (C) 2003 Elsevier B.V. All rights reserved.
引用
收藏
页码：381 / 387
页数：7
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