Effect of Ca-substitution in La1-xCaxFeO3 perovskites on the catalytic activity for soot combustion

被引：33
作者：
Jimenez, R. [1 ]
Zamora, R. [2 ]
Pecchi, G. [2 ]
Garcia, X. [1 ]
Gordon, A. L. [1 ]
机构：
[1] Univ Concepcion, Dept Ingn Quim, Concepcion, Chile
[2] Univ Concepcion, Dept Quim Fis, Concepcion, Chile
来源：
FUEL PROCESSING TECHNOLOGY | 2010年 / 91卷 / 05期
关键词：
Ca-substituted lanthanum perovskites; Soot combustion; alpha-oxygen; PARTICULATE; REMOVAL; OXIDATION; OXIDES; REDOX; NOX;
D O I：
10.1016/j.fuproc.2009.12.017
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
La1-xCaxFeO3 (x = 0.1, 0.2, 0.3 and 0.4) perovskites, prepared by the citrate method and characterized by AAS, XRD, TPR-H-2 and TPD-O-2, were assayed, and its catalytic activity evaluated for soot combustion, using carbon black as a model compound for soot. The catalytic activity was determined by non-isothermal thermogravimetric analysis. A significant enhancement of the catalytic activity was found by increasing the degree of La3+ substitution by Ca2+ in the perovskites. which coincided with an increase of the a-oxygen concentration and thus, a probable enrichment of the CB surface with these oxygenated species, at the start of the combustion. (C) 2010 Elsevier B.V. All rights reserved.
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收藏
页码：546 / 549
页数：4
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