Methy methacrylate in the atmosphere: OH- and Cl-initiated oxidation in the gas phase

M. B. BLANCO, I. BEJAN, I. BARNES, P. WIESEN AND M. TERUEL

Alushta, Ukraine

Congreso; Simulation and Assessment of Chemical processes in a Multiphase Environment- NATO ARW; 2007

NATO ARW

Abstract Rate coefficients for the reactions of OH radicals and Cl atoms with methyl methacrylate have been determined at 298 ± 2 K and atmospheric pressure (~760 ± 10 Torr) in a 405 and 1080 L different photoreactors coupled with  in situ FTIR spectroscopy. The following values of kOH = (0.43 ± 0.05) × 10-10 and kC l= (2.86 ± 1.37) × 10-10 in units of cm3 molecule-1 s-1 were obtained. Methyl pyruvate and formadehyde were determined as reaction products in the reaction of methyl methacrylate with OH radicals in accordance with the OH radical addition to the less substituted carbon of the double bond. Atmospheric implications of the reactions were assessed calculating the lifetime of methyl methacrylate in the atmosphere.