Catalytic reduction of NO by coal chars loaded with Ca and Fe in various atmospheres

被引:58
作者
Zhao, ZB [1 ]
Li, W [1 ]
Li, BQ [1 ]
机构
[1] Chinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Peoples R China
基金
中国国家自然科学基金;
关键词
NO; reduction; char; calcium; iron atmospheres;
D O I
10.1016/S0016-2361(02)00077-7
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
The effects of calcium and iron impregnated on coal chars as catalysts on NO-char reaction have been investigated under various atmospheres in a quartz fixed bed reactor. Temperature programmed reaction and isothermal reaction were used to determine the catalytic activities of calcium and iron in NO-char reaction. The results showed that the higher the pretreatment temperatures are, the lower is the catalytic activity of calcium, while the pretreatment temperatures had little effect on iron. Both calcium and iron promoted the NO-char reaction, but the catalytic activity of the latter was higher than that of the former. NO reduction by CO was strongly promoted by Fe and Ca impregnated on char, The presence of O-2 in the char-NO-Ca and char-NO-Fe or pure char-NO systems significantly promoted the NO reduction over carbon. Oxidation/reduction mechanisms were proposed for the NO reduction over char catalyzed by Ca and Fe. (C) 2002 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:1559 / 1564
页数:6
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