Kinetics of the reaction of OH radicals with a series of ethers under simulated atmospheric conditions at 295 K

Timothy J. Wallington, Jean M. Andino, Loretta M. Skewes, Walter O. Siegl, Steven M. Japar

Research output: Contribution to journalArticle

74 Scopus citations

Abstract

Ethers are being increasingly used as motor fuel additives to increase the octane number and to reduce CO emissions. Since their reaction with hydroxyl radicals (OH) is a major loss process for these oxygenated species in the atmoshpere, we have conducted a relative rate study of the kinetics of the reactions of OH radicals with a series of ethers and report the results of these measurements here. Experiments were performed under simulated atmospheric conditions; atmospheric pressure (≃ 740 torr) in synthetic air at 295 K. Using rate constants of 2.53 × 10−12, and 1.35 × 10−11 cm3 molecule−1 s−1 for the reaction of OH radicals with n‐butane and diethyl ether, the following rate constants were derived, in units of 10−11 cm3 molecule−1 s−1: dimethylether, (0.232 ± 0.023); di‐n‐propylether, (1.97 ± 0.08); di‐n‐butylether, (2.74 ± 0.32); di‐n‐pentylether, (3.09 ± 0.26); methyl‐t‐butylether, (0.324 ± 0.008); methyl‐n‐butylether, (1.29 ± 0.03); ethyl‐n‐butylether, (2.27 ± 0.09); and ethyl‐t‐butylether, (0.883 ± 0.026). Quoted errors represent 2σ from the least squares analysis and do not include any systematic errors associated with uncertainties in the reference rate constants used to place our relative measurements on an absolute basis. The implications of these results for the atmospheric chemistry of ethers are discussed.

Original languageEnglish (US)
Pages (from-to)993-1001
Number of pages9
JournalInternational Journal of Chemical Kinetics
Volume21
Issue number11
DOIs
StatePublished - Nov 1989
Externally publishedYes

ASJC Scopus subject areas

  • Biochemistry
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry

Fingerprint Dive into the research topics of 'Kinetics of the reaction of OH radicals with a series of ethers under simulated atmospheric conditions at 295 K'. Together they form a unique fingerprint.

  • Cite this