Effect of Volatile-Char Interaction on Nitrogen Oxide Emission during Combustion of Blended Coal
Publication: Journal of Energy Engineering
Volume 142, Issue 4
Abstract
Utilization of blended coal has been a great issue due to the increasing off-specification coals received in power plants, while the reduction of nitrogen oxide is also attracting extensive attention in China. This study deals with the effect of volatile-char interaction on nitrogen oxide emission during combustion of blended coal using a specially designed tubular multilayer reactor to achieve the separate combustion of volatile and char in a rapid succession. The volatile-char interaction can promote NO reduction at low temperature, while it could give rise to more . The temperature shows a nonmonotonic influence on the conversion of fuel nitrogen. The conversion of volatile nitrogen to NO of blended coal has slight relevance to blending ratio and oxygen content, while the case for char is significantly different. High oxygen content can promote the transformation from NO to on char surfaces. The interaction between component coals mainly occurs on char during combustion of blended coals. The present study provides insight into the possible interactions on nitrogen oxide release and further reduction in blended coal-fired power plants.
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Acknowledgments
We acknowledge financial support from the National Natural Science Foundation of China (No. 51506163) and Fundamental Research Funds for the Central Universities.
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Published In
Journal of Energy Engineering
Volume 142 • Issue 4 • December 2016
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© 2016 American Society of Civil Engineers.
History
Received: Jun 5, 2015
Accepted: Nov 3, 2015
Published online: Jan 20, 2016
Discussion open until: Jun 20, 2016
Published in print: Dec 1, 2016
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