Research Progress and Prospect of Ammonia-doped Combustion in Coal-fired Power Plants Under the Background of Dual Carbon
In the context of carbon neutrality,selecting low-carbon fuel ammonia for the retrofitting of coal-fired power plants is particularly important.This paper first introduces the basic physical properties of ammonia and the advantages of ammonia co-firing.It then focuses on new applications of ammonia-coal co-firing technology,classifying it according to the output power of coal-fired equipment.This includes small-scale ammonia co-firing burners,kilowatt-level coal-fired ammonia co-firing systems,megawatt-level systems,and large-scale coal-fired power plant ammonia co-firing systems,detailing the current research progress.Finally,the paper analyzes and forecasts the prospects of ammonia co-firing in coal-fired power plants.Ammonia co-firing in coal-fired power plants can significantly reduce carbon emissions,although it may lead to NOx emission issues.NOx emissions can be effectively controlled through staged air supply,ammonia pre-decomposition,and adjusting the ammonia injection position and ratio.Finally,challenges remain in addressing the significant differences in the reactivity of coal and ammonia gas-solid fuels,high NOx concentrations,lack of large-capacity high-ratio co-firing burner technology,and achieving breakthrough in key technologies related to"large-scale ammonia supply,clean ammonia combustion,and flexible operation."
ammonia combustioncoal-fired power stationcarbon emission reduction
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