FOTOOXIDACIÓN ATMOSFÉRICA DE FLUOROACETATO DE ETILO INICIADA POR RADICALES OH●

IULIA PATROESCU-KLOTZ; NIKLAS ILLMANN; MARIANO TERUEL; PETER WIESEN; LUGO, PEDRO L.; BLANCO MARÍA BELÉN

Simposio; V Simposio de Química Inorgánica, Analítica y Fisicoquímica (QIAF); 2021

The rate coefficients for the gas-phase reaction of OH radicals with Ethyl Fluoroacetate (FAE) was determined for the first time at (298 ± 3) K and atmospheric pressure using the relative-rate method with Fourier Transform Infrared Spectroscopy (FTIR) and Gas Chromatography with Flame Ionization Detection (GC-FID)to monitor both reactants and references compounds. From the different measurements the following rate coefficient (cm3 molecule−1 s−1) have been determined with FTIR and GC-FID analysis: kFTIR(FAE+OH) = (1.17 ± 0.14)×10-12 and kGC-FID(EFA+OH)=(1.42 ± 0.36)×10-12 respectively. Based on the present results, the tropospheric lifetime of FAE with respect to their reaction with OH radicals is estimated around 5 days. The short lifetime calculated for this compound indicate that it could degraded close to the emission source areas, causing a local impact potentially leading photo-oxidants in the atmosphere, responsible for the formation of photochemical smog. In addition, the formation of tropospheric ozone was estimated trough the Photochemical Ozone Creation Potential (POCP) with a value of 10.6 for the EFA. An acidification potential (AP) for EFA of 0.3 was calculated.