000170453 001__ 170453 000170453 005__ 20260420103355.0 000170453 0247_ $$2doi$$a10.1016/j.combustflame.2026.114966 000170453 0248_ $$2sideral$$a148876 000170453 037__ $$aART-2026-148876 000170453 041__ $$aeng 000170453 100__ $$0(orcid)0000-0002-2598-2405$$aRuiz-Gutiérrez, Adrián$$uUniversidad de Zaragoza 000170453 245__ $$aFlow reactor study of NH3/DMM oxidation 000170453 260__ $$c2026 000170453 5060_ $$aAccess copy available to the general public$$fUnrestricted 000170453 5203_ $$aThis study presents a comprehensive investigation of the conversion of ammonia (NH3) and dimethoxymethane (DMM) mixtures in a quartz flow reactor. Experiments were carried out at atmospheric pressure and across a wide range of conditions to elucidate species profiles, many of which have not been extensively characterised previously. The operational parameters included temperatures between 875 and 1425 K, NH3/DMM ratios from 0.48 to 10.86, and oxygen excess ratios (λ) from 0 to 3.12. Quantification of numerous compounds was achieved using a micro gas chromatograph (GC) in combination with a continuous gas analyser. Simulations with an updated detailed chemical kinetic mechanism were carried out in order to elucidate the conversion pathways of the mixture constituents. Calculations were in good consistency with the experimentally observed ones for the key species. NH3 conversion was highly sensitive to variations in O2, whereas DMM exhibited only minor changes in its reaction temperature (approximately 50 K). The principal consumption pathway of DMM involves hydrogen abstraction from the central carbon by CH3 radicals. This facilitates the access of ammonia to a greater number of radicals, as competition for OH or O radicals is less pronounced. NO formation was influenced by the presence of DMM, increasing with both the oxygen excess ratio (λ) and the proportion of DMM in the mixture. It was further concluded that DMM exerts a significant influence on NH3 behaviour when the NH3/DMM ratio is ≤ 1, an effect that decreases at higher initial O2 concentrations (λ > 1). Overall, this work provides new insights into the conversion behaviour of NH3/DMM mixtures under the investigated conditions and provides essential reference data for further development of detailed kinetic models. 000170453 536__ $$9info:eu-repo/grantAgreement/ES/DGA/T22-23R$$9info:eu-repo/grantAgreement/ES/MICINN/PID2021-12432OB-I00$$9info:eu-repo/grantAgreement/ES/MICINN/PID2025-155489OB-I00$$9info:eu-repo/grantAgreement/EUR/MICINN/TED2021-129557B-I00 000170453 540__ $$9info:eu-repo/semantics/openAccess$$aby-nc-nd$$uhttps://creativecommons.org/licenses/by-nc-nd/4.0/deed.es 000170453 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion 000170453 700__ $$aMazano-Peña, Daniel 000170453 700__ $$0(orcid)0000-0003-4679-5761$$aAlzueta, María U.$$uUniversidad de Zaragoza 000170453 7102_ $$15005$$2790$$aUniversidad de Zaragoza$$bDpto. Ing.Quím.Tecnol.Med.Amb.$$cÁrea Tecnologi. Medio Ambiente 000170453 773__ $$g288 (2026), 114966 [9 pp.]$$pCombust. flame$$tCombustion and Flame$$x0010-2180 000170453 8564_ $$s1803594$$uhttps://zaguan.unizar.es/record/170453/files/texto_completo.pdf$$yVersión publicada 000170453 8564_ $$s2492151$$uhttps://zaguan.unizar.es/record/170453/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada 000170453 909CO $$ooai:zaguan.unizar.es:170453$$particulos$$pdriver 000170453 951__ $$a2026-04-18-10:49:51 000170453 980__ $$aARTICLE