Ni/Al2O3 catalysts: effects of the promoters Ce, La and Zr on the methane steam and oxidative reforming reactions

被引：53
|
作者：
Silva, Tatiana de Freitas [1 ]
Costa Dias, Joelmir Augusto [2 ]
Maciel, Cristhiane Guimaraes [1 ]
Assaf, Jose Mansur [1 ]
机构：
[1] Univ Fed Sao Carlos, Dept Engn Quim, Lab Catalise, BR-13565905 Sao Carlos, SP, Brazil
[2] PETROBRAS REPLAN Refinaria Paulinia, BR-13140000 Paulinia, SP, Brazil
来源：
CATALYSIS SCIENCE & TECHNOLOGY | 2013年 / 3卷 / 03期
基金：
巴西圣保罗研究基金会;
关键词：
HYDROGEN-PRODUCTION; NI; LA2O3; PROPANE; ETHANOL; SURFACE; OXIDES;
D O I：
10.1039/c2cy20573d
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：
The influence of the promoters CeO2, CeO2-ZrO2 and CeO2-La2O3 on the reactivity of gamma-Al2O3 supported nickel catalysts from steam and oxidative reforming of methane was investigated in this study. At temperatures above 500 degrees C, promoted catalysts showed the best performance in the methane oxidative reforming reaction. The increase in activity can be attributed to the specific catalyst-promoter interactions such as the capacity of CeO2 to store and release oxygen and the influence of La2O3 on the stability of the support. Below 500 degrees C, the activity of the catalyst may be related more directly to the exposed metal surface area.
引用
收藏
页码：635 / 643
页数：9
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