화력발전 무탄소 에너지 전환을 위한 보일러 모사 장치에서 암모니아 주입 전략 연구
Carbon-free Energy Transition in Thermal Power Plant: Ammonia Injection Strategies Analysis in Boiler Simulator
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The International Energy Agency(IEA) predicts that by 2050, hydrogen and ammonia will account for approximately 19% of the global energy demand. Ammonia, with a high hydrogen content and a higher boiling point than hydrogen, presents itself as a favorable energy storage medium. This study investigates the effects of ammonia injection position and coal grade on combustion characteristics and emissions in coal-fired power plants as part of the transition towards carbon neutrality. ADTF(Ammonia Drop Tube Furnace) experiments were conducted to assess NOx, CO2, N2O, and NH3 slip emissions under low-load conditions. The findings from ADTF experiments indicate that ammonia injection position significantly impacts combustion characteristics and emissions. Coal B, a lower grade coal with high volatile matter, exhibited better combustion characteristics and lower UBC emissions compared to Coal A. NOx emissions were influenced by the ammonia injection position, with a low injection position leading to NOx reduction due to the effect of ammonia as a reducing agent in the combustion environment. Mixed coal showed trends similar to Coal A, but it could serve as a solution for utilizing high-grade coal and exhibited better emission levels in some aspects compared to single coal cases. So, underscores the potential of ammonia-coal co-firing in achieving significant emission reductions and enhancing the combustion efficiency of coal-fired boilers.
Abstract
The International Energy Agency(IEA) predicts that by 2050, hydrogen and ammonia will account for approximately 19% of the global energy demand. Ammonia, with a high hydrogen content and a higher boiling point than hydrogen, presents itself as a favorable energy storage medium. This study investigates the effects of ammonia injection position and coal grade on combustion characteristics and emissions in coal-fired power plants as part of the transition towards carbon neutrality. ADTF(Ammonia Drop Tube Furnace) experiments were conducted to assess NOx, CO2, N2O, and NH3 slip emissions under low-load conditions. The findings from ADTF experiments indicate that ammonia injection position significantly impacts combustion characteristics and emissions. Coal B, a lower grade coal with high volatile matter, exhibited better combustion characteristics and lower UBC emissions compared to Coal A. NOx emissions were influenced by the ammonia injection position, with a low injection position leading to NOx reduction due to the effect of ammonia as a reducing agent in the combustion environment. Mixed coal showed trends similar to Coal A, but it could serve as a solution for utilizing high-grade coal and exhibited better emission levels in some aspects compared to single coal cases. So, underscores the potential of ammonia-coal co-firing in achieving significant emission reductions and enhancing the combustion efficiency of coal-fired boilers.
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