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

页码：381 / 387

页数：7