Tropospheric chemical degradation of methyl acrylate and butyl methacrylate initiated by chlorine atoms

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

Geophysical Research Abstracts

European Geophysical Union (EGU)

Lugar: Vienna; Año: 2008 vol. 1 p. 10 - 10

1029-7006

nsaturated esters are widely used in industrial processes for the production of polymers, paper coating, paint formulations, etc. The sources of their emissions include among others the manufacture of plastics, aircraft and electronic components. While the OH radical is considered to be the major daytime oxidant for the marine environment and coastal areas, reaction with Cl atoms has been shown to be an additional and sometimes potentially significant removal process of these compounds. In the present study we report for the first time, the determination of rate constants for the reactions of Cl atoms with methyl acrylate (k1) and butyl methacrylate (k2), using a relative kinetic method. The rate constants were measured relative to both isobutene and 1,3-butadiene as reference compounds in 1 atm of air at 298 K. All the experiments were performed in a 1080 l quartz-glass photoreactor using in situ FTIR analysis to monitor the decay of the organics. The following rate const