Progress in numerical simulations and fundamental characteristics of pulverized coal co-firing with ammonia.

Coal-fired power plants are still the way of power generation in most countries, but the CO 2 generated by coal remains high. Pulverized coal co-firing with ammonia is expected to reduce greenhouse gas emissions, which has become a hot topic. This review summarizes the progress on pulverized coal co-firing with ammonia. The effects of ammonia co-firing on the formation and transformation mechanisms of NO x and emission characteristics, as well as the emissions of other pollutants, are analyzed and summarized. This review also focuses on applying the computational fluid dynamics (CFD) sub-models in pulverized coal co-firing with ammonia. CFD is vital in pulverized coal ammonia research because of its speed and low-cost advantages. The sub-models and mechanisms of turbulent flow, heat transfer, combustion, and pollutant generation are summarized to understand better the combustion process of CFD co-combustion of pulverized coal and ammonia. Finally, the influence of pulverized coal mixed with ammonia, the CFD sub-model application, and the areas to be improved are summarized and prospected. Pulverized coal co-firing with ammonia is a feasible method to reduce carbon. This review offers fundamental theoretical support and technical guidance for the subsequent pulverized coal co-firing with ammonia. • Coal-NH 3 co-firing effectively reduces the CO 2 produced by coal combustion. • Computational fluid dynamics plays a vital role in studies on coal-NH 3 co-firing. • Classic models of computational fluid dynamics in coal-NH 3 co-firing are reviewed. • Coal-NH 3 co-firing exhibits good application prospects and some challenges. [ABSTRACT FROM AUTHOR]