제철 부생가스 암모니아 혼소의 층류 화염 특성 분석 = Laminar Flame Analysis of Steel Off-Gases and Ammonia Co-firing

다국어 초록 (Multilingual 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.