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Research Article

Laminar Flame Analysis of Steel Off-Gases and Ammonia Co-firing

제철 부생가스 암모니아 혼소의 층류 화염 특성 분석

Kyeong-Ho Kim1
,
Byoung-Hwa Lee1
,
Chung-Hwan Jeon12†
김 경호1
,
이 병화1
,
전 충환12†
11 Pusan Clean Energy Research Insititute, Pusan National University
2School of Mechanical Engineering, Pusan National University
1부산대학교 청정화력발전에너지연구소
2부산대학교 기계공학부
*Corresponding Author
31 March 2026. pp. 11-18
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Abstract

To achieve carbon neutrality in the steel industry, co-firing ammonia (NH3) with steel mill off-gases, specifically coke oven gas (COG) and blast furnace gas (BFG), has emerged as a promising decarbonization strategy. This numerical study investigates the combustion characteristics of co-firing NH3 with COG and BFG. Using the Okafor mechanism, laminar burning velocities and NOx emissions were analyzed. Results indicate that COG, NH3 co-firing reduces laminar burning velocity due to radical competition but increases NOx emissions. Conversely, BFG, NH3 mixtures exhibit non-linear laminar burning velocity, recovering stability at higher fractions, and demonstrate a significant DeNOx effect with reduced emissions compared to pure NH3. These findings provide essential data for optimizing co-firing ratios to balance combustion stability and environmental compliance in steel manufacturing.

Keywords
Ammonia
Steel mill off-gas
Laminar burning velocity
Coke oven gas
Ammonia co-firing
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Information
  • Publisher :The Korean Society of Combustion
  • Publisher(Ko) :한국연소학회
  • Journal Title :Journal of the Korean Society of Combustion
  • Journal Title(Ko) :한국연소학회지
  • Volume : 31
  • No :1
  • Pages :11-18
  • Received Date : 2026-01-26
  • Revised Date : 2026-03-10
  • Accepted Date : 2026-03-10
  • DOI :https://doi.org/10.15231/jksc.2026.31.1.011
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