Resumen: The present work addresses the oxidation of ammonia and ammonia-nitric oxide mixtures in a CO2 atmosphere, characteristic of oxy-fuel processes and/or biogas combustion, from both experimental and kinetic modelling points of view. A parametric study of NH3 and NH3/NO mixtures oxidation is carried out, evaluating the influence of the temperature (700–1500 K), stoichiometry (from pyrolysis, λ = 0, to significantly oxidizing conditions, λ = 3.3), gas residence time (low values, 195/T(K) s and high values, 3100/T(K) s) and NH3/NO ratio (0.5–2.2), at atmospheric pressure under well-controlled laboratory conditions using two tubular flow reactor setups. Experimental results have been simulated with an updated literature reaction mechanism, which has been used to interpret the experimental observations. Idioma: Inglés DOI: 10.1016/j.fuel.2022.125133 Año: 2022 Publicado en: Fuel 327 (2022), 125133 [8 pp.] ISSN: 0016-2361 Factor impacto JCR: 7.4 (2022) Categ. JCR: ENGINEERING, CHEMICAL rank: 19 / 141 = 0.135 (2022) - Q1 - T1 Categ. JCR: ENERGY & FUELS rank: 32 / 119 = 0.269 (2022) - Q2 - T1 Factor impacto CITESCORE: 12.2 - Energy (Q1) - Chemistry (Q1) - Chemical Engineering (Q1)