Effect of different ammonia/methanol ratios on engine combustion and emission performance

The combustion efficiency of ammonia fuel engines is low, and the concentration of unburned ammonia and N2O emissions in the exhaust gas is high. This article aims to study the impact of diesel-ignited ammonia/methanol engines on combustion and emission performance, explore the improvement of methanol on ammonia fuel combustion, and find the optimal ammonia/methanol mixture ratio. The research indicates that as the methanol mixing ratio increases, the concentration of unburned ammonia in the exhaust gas gradually decreases, and the power performance is greatly improved. The concentration of CO, soot, CO2, and NOx in the exhaust gas has increased, but due to the combustion support of methanol, the engine N2O emissions have significantly decreased. Mixing methanol improves combustion efficiency and solves the problems of ammonia escape and high N2O emissions. In this paper, the optimal mixing ratio of ammonia/methanol is 8:2. The combustion mode of the diesel ignition ammonia/methanol engine studied effectively solves the problems of ammonia escape and high N2O emissions during ammonia combustion, promotes the development of ammonia in the field of compression ignition engines, and promotes the realization of the purpose of carbon reduction.