Numerical Study of Turbulent Premixed Flames of CH4-H2-NH3

This work presents a numerical study of premixed combustion of a mixture composed of methane (CH4), hydrogen (H2), and ammonia (NH3). The main objective is to evaluate the effect of adding H2 and NH3 on CH4 flame stability, combustion temperature, and the formation of nitrogen oxides (NOx). The simulations were carried out using the ANSYS Fluent software for different proportions of ammonia (from 0% to 25%) with a constant hydrogen rate of 50%. The results show that an increase in NH3 leads to a slight decrease in the maximum flame temperature (from 1920K to 1790K) and a significant reduction in NOx emissions. Hydrogen, for its part, improves the reactivity and stability of the combustion. Thus, the CH4–H2–NH3 combination makes it possible to obtain a cleaner and more stable combustion, constituting a promising path toward the decarbonization of energy systems and the development of sustainable technologies.