OH and Cl radicals initiated oxidation of amyl acetate under atmospheric conditions: kinetics, products and mechanisms

STRACCIA C, VIANNI G.; BLANCO, MARIA B.; TERUEL, MARIANO A.

Environmental Science: Atmospheres

Environmental Science: Atmospheres

Año: 2023

2634-3606

he relative rate coefficients of the gas-phase reaction of amyl acetate, (AA), CH3COO(CH2)4CH3 with OH radicals and Cl atoms were determined at (298 ± 2) K and 1000 mbar of pressure. The experiments were developed in two different atmospheric Pyrex chambers coupled with “in situ” Fourier Transform Infrared (FTIR) spectroscopy and Gas Chromatography equipped with flame ionization detection (GC-FID). The rate coefficients obtained from the average of different experiments were (in units of cm3 molecule−1 s−1): kAA+OH-FTIR = (6.00 ± 0.96) × 10−12; kAA+OH-GC-FID = (6.37 ± 1.50) × 10−12 and kAA+Cl-GC-FID = (1.35 ± 0.14) × 10−10. Additionally, product studies were completed for the Cl-initiated oxidation of AA, in similar conditions of the kinetic experiments by Gas Chromatography coupled with a mass detector (GC-MS) with Solid Phase Micro Extraction (SPME). Acetic acid, formaldehyde, acetaldehyde, propionaldehyde, and butyraldehyde were the main products ident