Kinetics of the reactions of hydroxyl radicals with aliphatic ethers studied under simulated atmospheric conditions: Temperature dependences of the rate coefficients |
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| Authors: | Paul J Bennett J Alistair Kerr |
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| Institution: | 1. Department of Chemistry, University of Birmingham, B15 2TT, Birmingham, England
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| Abstract: | Rate coefficients have been measured for the reactions of hydroxyl radicals with five aliphatic ethers over the temperature range 242–328 K. Competitive studies were carried out in an atmospheric flow reactor in which the hydroxyl radicals were generated by the photolysis of methyl nitrite in the presence of air containing nitric oxide. The reaction of OH with 2,3-dimethyl-butane was used as the reference reaction and the following Arrhenius parameters have been obtained for the reactions: OH+ROR products:
| dethyl ether | –2.8±0.4 | 3.5±0.6 | | di-n-propyl ether | –1.2±0.6 | 11.5±2.7 | | methylt-butyl ether | 0.85±0.59 | 4.0±1.3 | | ethyln-butyl ether | –1.3±0.5 | 8.7±1.7 | | ethylt-butyl ether | –1.2±0.6 | 3.0±0.8 |
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| Keywords: | Almospheric photo-oxidation hydroxyl radicals diethyl ether d--n-propyl ether methylt-butyl ether ethyln-butyl ether ethylt-butyl ether smog chamber kinetic studies relative rate coefficients |
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