OH and O3-initiated oxidation of ethyl vinyl ether
Abstract
The reaction rate constants of OH and O3 with ethyl vinyl ether (EVE, C2H5OCHCH2) have been measured in the temperature range 230–372 K and 298 K, respectively. The temperature dependent rate constant for the reaction with OH was found to be well represented by the expression: k1 = (1.55 ± 0.25) × 10−11 exp[(445 ± 13)/T] cm3 molecule−1 s−1, and at 298 K, k1 = (6.8 ± 0.7) × 10−11 cm3 molecule−1 s−1. The reaction rate constant of O3 with EVE was determined to be k2 = (2.0 ± 0.2) × 10−16 cm3 molecule−1 s−1 at 298 K. Using two different simulation chambers, the OH and O3-initiated oxidation of ethyl vinyl ether in air was also investigated. The main products observed from both reactions were formaldehyde and ethyl formate. The results obtained are presented and their atmospheric relevance briefly discussed.