Oxidation of diethyl ether/ammonia mixtures in a flow reactor at different pressures

García-Ruiz, P. ; García, M. ; Abián, M. ; Alzueta, M.U. (Universidad de Zaragoza)

Resumen: Ammonia (NH3) in their mixtures with diethyl ether (DEE) represents a strategy to reduce CO2 emissions and overcome the limitations of NH3 combustion, even for a small addition of DEE (5 %). DEE is considered a potential substitute for fossil fuels when obtained from bioethanol. The present work performs an experimental and kinetic analysis of DEE/NH3 oxidation and the formation of combustion products at different pressures (1–40 bar), in the 290 K–1180 K temperature range using a quartz tubular flow reactor by analyzing the effects of the main variables (pressure, temperature, oxygen excess ratio, and DEE/NH3 ratio) using argon as a bath gas. The results indicate that either increasing pressure, DEE/NH3 ratio, or oxygen availability results in a shift of NH3 and DEE conversion to lower temperatures. DEE and NH3 show a negative temperature coefficient (NTC) phenomenon at low temperatures, influenced by pressure, oxygen excess, and the DEE/NH3 ratio. The pressure effect is particularly significant in the low pressures studied. The main nitrogen products are N2 and N2O. HCN is only produced under atmospheric pressure, while NO2 and NO concentrations are below the detection limit under all considered conditions. N2O formation is favored by increasing stoichiometry, pressure, and DEE/NH3 ratio. Apart from CO and CO2, CH4, CH3OH, C2H4, and CH3CHO have been found as produced carbon pecies. The experimental results are interpreted in terms of a chemical kinetic mechanism for DEE/NH3 mixtures, which can describe the main trend of NH3 and DEE conversion under the studied conditions.

Idioma: Inglés

DOI: 10.1016/j.fuel.2025.138129

Año: 2026

Publicado en: Fuel 413 (2026), 138129 [11 pp.]
ISSN: 0016-2361

Financiación: info:eu-repo/grantAgreement/ES/DGA-FEDER/T22-23R
Financiación: info:eu-repo/grantAgreement/ES/MICINN/PID2021-124032OB-I00
Financiación: info:eu-repo/grantAgreement/EUR/MICINN/TED2021-129557B-I00
Financiación: info:eu-repo/grantAgreement/ES/MINECO/PRE2019-090162

Tipo y forma: Artículo (PostPrint)

Área (Departamento): Área Tecnologi. Medio Ambiente (Dpto. Ing.Quím.Tecnol.Med.Amb.)