000162279 001__ 162279 000162279 005__ 20251017144604.0 000162279 0247_ $$2doi$$a10.1021/acs.energyfuels.5c01020 000162279 0248_ $$2sideral$$a144846 000162279 037__ $$aART-2025-144846 000162279 041__ $$aeng 000162279 100__ $$aAlexandrino, Katiuska 000162279 245__ $$aHigh-Pressure Oxidation of Ammonia Mixed with Dimethoxymethane 000162279 260__ $$c2025 000162279 5060_ $$aAccess copy available to the general public$$fUnrestricted 000162279 5203_ $$aThe oxidation of ammonia-dimethoxymethane (NH3-DMM) mixtures at high pressure was analyzed from both experimental and kinetic modeling points of view. Experiments were performed using a laboratory tubular flow reactor installation and were conducted at 10, 20, and 40 bar under fuel-rich (λ = 0.7), stoichiometric (λ = 1), and fuel-lean (λ = 3) conditions and temperatures ranging from 650 to 1250 K. The inlet DMM concentration was varied (100 and 200 ppm), keeping the concentration of ammonia constant at 1000 ppm. The data were interpreted in terms of a detailed chemical kinetic model. Despite some discrepancy between the model predictions and measurements, the model accurately followed the experimental trends, highlighting its ability to describe the oxidation of the NH3-DMM mixture. The experimental and predicted results suggested that the conversion of both ammonia and DMM was favored by increased pressure and higher inlet concentrations of O2 and DMM. Under the conditions of the present work, the dominant path for ammonia and DMM conversion leads to N2/N2O and CO/CO2 in any case. Concentrations of NO and NO2 were below the detection limit in all the experimental conditions studied, which imply a benefit in the reduction of NOx emissions during the combustion of pure ammonia. DMM enhanced the ammonia reactivity, although its presence leads to the formation of CO2 not only by the common CO + OH reaction but also through the interaction of N2O with CO. 000162279 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttps://creativecommons.org/licenses/by/4.0/deed.es 000162279 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion 000162279 700__ $$aAndrés, Álvaro 000162279 700__ $$0(orcid)0000-0002-7708-7912$$aCallejas, Alicia$$uUniversidad de Zaragoza 000162279 700__ $$0(orcid)0000-0003-4679-5761$$aAlzueta, María U.$$uUniversidad de Zaragoza 000162279 7102_ $$15005$$2790$$aUniversidad de Zaragoza$$bDpto. Ing.Quím.Tecnol.Med.Amb.$$cÁrea Tecnologi. Medio Ambiente 000162279 773__ $$g39, 29 (2025), 14213-14222$$pEnergy fuels$$tEnergy and Fuels$$x0887-0624 000162279 8564_ $$s3162051$$uhttps://zaguan.unizar.es/record/162279/files/texto_completo.pdf$$yVersión publicada 000162279 8564_ $$s3156279$$uhttps://zaguan.unizar.es/record/162279/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada 000162279 909CO $$ooai:zaguan.unizar.es:162279$$particulos$$pdriver 000162279 951__ $$a2025-10-17-14:14:43 000162279 980__ $$aARTICLE