RESEARCH ARTICLE

Effect of Fe on NO release during char combustion in air and O2/CO2

  • Ying GU ,
  • Xiaowei LIU ,
  • Bo ZHAO ,
  • Minghou XU
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  • State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China

Received date: 12 Dec 2011

Accepted date: 19 Jan 2012

Published date: 05 Jun 2012

Copyright

2014 Higher Education Press and Springer-Verlag Berlin Heidelberg

Abstract

The chemistry of char was probed by studying nitrogen release under the reactions with air and oxy-fuel combustion. The experiments were conducted in a drop tube furnace and a fixed bed flow reactor. NO was observed during those experiments. The results show that the particle size of char generated at 1073 K in CO2 is larger than that in N2. However, at 1573 K, it is smaller in CO2 atmosphere due to particle breaking by gasification of char and CO2. The Fe addition increases the NO conversion ratio, and the effect of Fe rises steeply with the process going until it becomes stable in the end. The results also indicate that the release of NO increases more significantly with the Fe addition in oxy-fuel environment.

Key words: NO; Fe; char; combustion; CO2

Cite this article

Ying GU , Xiaowei LIU , Bo ZHAO , Minghou XU . Effect of Fe on NO release during char combustion in air and O2/CO2[J]. Frontiers in Energy, 2012 , 6(2) : 200 -206 . DOI: 10.1007/s11708-012-0181-2

Acknowledgements

This work was partially supported by the National Natural Science Foundation of China (Grant Nos. 50906028, 51021065).
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