Influence of Na and Ca on the emission of NOx during coal combustion

被引：44
|
作者：
Zhao, ZB
Li, W
Qiu, JS
Wang, XZ
Li, BQ
机构：
[1] Chinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Peoples R China
[2] Dalian Univ Technol, Sch Chem Engn, State Key Lab Fine Chem, Carbon Res Lab, Dalian 116012, Peoples R China
来源：
FUEL | 2006年 / 85卷 / 5-6期
基金：
中国国家自然科学基金;
关键词：
NOx; coal; Na; Ca; combustion;
D O I：
10.1016/j.fuel.2005.09.001
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：
Temperature programmed combustion of a Chinese brown coal before and after demineralization was carried out in a tubular quartz fixed bed reactor. The evolution of NOx during coal combustion has been investigated with an aim of figuring out the influence of indigenous mineral matter in coal as well as the loaded alkali and alkaline earth metals (Na, Ca). The results show that the mineral matter in the coal suppresses the conversion of fuel-N to NOx, and at the same time, significantly promotes the coal combustion process. The added Na exhibits high catalytic activity for the coal combustion and NOx reduction. In the case of Ca, its effect on the combustion of coal is ignorable but the emission level of NOx increases distinctively due to the presence of Ca. The formation of N-Ca intermediates that preferentially direct the conversion of fuel-N towards NOx during coal combustion is proposed and discussed. (C) 2005 Elsevier Ltd. All rights reserved.
引用
收藏
页码：601 / 606
页数：6
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