Based on laminar burning experiments of ammonia/ethanol mixtures, a new chemical reaction mechanism is developed and validated, comprising 91 species and 445 reactions. Numerical studies investigate how varying ethanol energy fractions and equivalence ratios influence the combustion characteristic and emissions of ammonia/ethanol mixtures. Most nitrogen oxides exist in the form of NO, with maximum NO emissions occurring at an equivalence ratio of about 0.85. When the equivalence ratio is less than 1.3, unburned ammonia is almost unaffected by ethanol addition. And the equivalence ratio for low-emission pollutants ranged between 1.1 and 1.3. And temperature exponent is studied, revealing that, for a specific equivalence ratio, the temperature exponent remains between 1.0 and 3.0. Additionally, virtual gas methods are used to study the influence of thermal effects as the laminar burning velocity (LBV) increases with different ethanol energy fractions. At p = 0.5 MPa and an ethanol energy fraction less than 0.2, the thermal effect has a minimal impact on increasing the LBV. When the ethanol energy fraction exceeds 0.2, the thermal effect accounts for approximately 40 %. When the primary atmospheric pressure is raised to 1.0 MPa, the influence of the thermal effect across different ethanol energy fractions is similar, accounting for about 45 %.
