The experimental data and simulation studies on ammonia co-combustion in coal-fired power plants in recent years are investigated

with a focus on the effect of ammonia fuel on NO_x generation. Through experimental observation

numerical simulation

and theoretical analysis

the spatial distribution of soot and polycyclic aromatic hydrocarbons(PAHs) during combustion is directly observed using high-speed cameras

laser-induced ignition(LII) method

and laser-induced fluorescence(PAH-LIF) method. It finds out that

the generation of NO_x during ammonia combustion is significantly higher than that of the conventional hydrocarbon fuels. Reasonable design of ammonia nozzles and selection of appropriate injection positions can significantly reduce the NO_x generation. The ammonia blending combustion technology provides a promising approach for achieving low-carbon transformation of coal-fired power plants. Although there are still challenges in the industrial application of large-scale ammonia blending combustion technology

the application prospects of ammonia fuel in coal-fired power plants are broad through continuous experimentation and technological optimization. Future research should continue to focus on the generation and emission of other pollutants during the process of ammonia combustion

and explore in depth the transformation behavior of minerals in coal in the combustion environment

providing theoretical and practical support for the industrialization of ammonia combustion technology.