A novel KCaNi/α-Al2O3 catalyst for CH4 reforming with CO2

被引：43
|
作者：
Hou, ZY [1 ]
Yokota, O [1 ]
Tanaka, T [1 ]
Yashima, T [1 ]
机构：
[1] RITE, Chem Res Grp, Kizu, Kyoto 6190292, Japan
来源：
CATALYSIS LETTERS | 2003年 / 87卷 / 1-2期
关键词：
CH4; dry reforming; KCaNi catalyst; TPR; TPSR; XPS;
D O I：
10.1023/A:1022849009431
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：
A potassium and calcium co-promoted nickel catalyst (KCaNi/alpha-Al2O3) prepared by a direct impregnation method possessed a high activity, high stability and excellent coke resistance properties in CH4 reforming with CO2. XRD, XPS and H-2-TPR characterizations indicated that (i) Ca and K strengthened the interaction between Ni and alpha-Al2O3 and promoted the formation of a unique NiAl2O4 phase on the surface of the catalyst and (ii) Ca and K increased the dispersion of Ni and retarded its sintering. Coking reactions (CH4 temperature-programmed decomposition and O-2-TPO) disclosed that K reduced carbon formation via CH4 decomposition.
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收藏
页码：37 / 42
页数：6
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