Ammonia/coal binary fuel gasification-combustion technology: Experimental study of optimal parameters for assisting denitrification and strengthening combustion

作者：Baochong Cui, Kejie Zhang, Weijian Hua, Xiaoxiao Wang, Renhui Ruan, Yibin Wang, Xuebin Wang, Houzhang Tan · 发表于：Fuel · 年份：2025 · DOI：10.1016/j.fuel.2025.136605 · 被引用次数：4 · 研究领域：Thermochemical Biomass Conversion Processes、Advanced Combustion Engine Technologies、Combustion and flame dynamics

The gasification-combustion technology has proven to be significant potential in assisting denitrification and strengthening combustion for ammonia (NH 3 )/coal binary fuels. However, previous studies have been limited to laboratory-scale, self-sustaining test rigs, restricting comprehensive investigations. Therefore, an electrically heated dual-temperature-zone gasification-combustion experimental platform was used in this study to systematically explore the effects of co-firing mode, gasification temperature, combustion temperature, and air distribution methods on fuel nitrogen (Fuel-N) transformation, gaseous fuel concentration distribution, nitrogen oxides (NO x ) emissions, and combustion characteristics during NH 3 /coal gasification-combustion. First, under 20 % NH 3 co-firing with primary air (PA_NH 3 ) mode, NH 3 conversion and Fuel-N to nitrogen (N 2 ) conversion in gasifier exceed 80 %, while NO x conversion rate remains below 0.1 %, which is favorable for fuel denitrification and controls NO x emissions. Besides, the concentration of highly reactive gaseous fuels is over 12 %, which strengthens homogeneous combustion intensity and promotes NH 3 /coal burnout. Second, as gasification temperature rises from 900 °C to 1100 °C, NH 3 and N 2 conversion rates increase without NO x detected at gasifier outlet, which improves the denitrification performance and reduces NO x emissions. Meanwhile, the conversion of NH 3 /coal to highly reactive gaseous fuels is promoted. Ho...