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2020 Vol.25, Issue 3

Research Article

Experimental Study of Flameless Combustion of Methane in Oxygen-Enriched Condition

산소 부화 조건의 메탄 무화염 연소에 관한 실험적 연구

Donghee Kim12
,
Kang Y. Huh1
,
Youngjae Lee2*
김 동희12
,
허 강열1
,
이 영재2*
1Pohang University of Science and Technology
2Korea Institute of Industrial Technology
1포항공과대학교
2한국생산기술연구원
* Corresponding Author
30 September 2020. pp. 1-10
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Abstract

This study was conducted to analyze the characteristics of flameless combustion and emissions using the lab-scale flameless combustion system fueled with methane. Especially, experiments were performed under oxygen-enriched conditions to expand the applications of flameless combustion and NOx reduction. The combustor able to induce the internal flue gas recirculation was applied, while the preheating of fuel and oxidant was not considered. The fraction of oxygen in oxidant was varied from 24.4% to 26.3%. The heat input was fixed at 3 kWth in all cases. From the experimental results, there was three combustion modes as the conventional flame, transitional period and flameless combustion. In the transitional period, the ignition and extinction of flame occurred repeatedly. Also, the flue gas compositions and pressure of the combustor were unstable. In the flameless combustion, the hot-spot of the conventional flame disappeared and the temperature distribution of the combustor became uniform. Moreover, the thermal-NOx was reduced in the flameless combustion mode and the trade-off relationship between CO and NOx was improved.

Keywords
Flameless combustion
Oxygen-enriched combustion
methane
NOx

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Information
  • Publisher :The Korean Society Combustion
  • Publisher(Ko) :한국연소학회
  • Journal Title :Journal of The Korean Society Combustion
  • Journal Title(Ko) :한국연소학회지
  • Volume : 25
  • No :3
  • Pages :1-10
  • Received Date : 2020-04-13
  • Revised Date : 2020-07-10
  • Accepted Date : 2020-07-11
  • DOI :https://doi.org/10.15231/jksc.2020.25.3.001
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