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Kinetic measurements of methyl and ethyl nitrate reactions with OH radicals

โœ Scribed by Masako Kakesu; Hiroshi Bandow; Norimichi Takenaka; Yasuaki Maeda; Nobuaki Washida

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
227 KB
Volume
29
Category
Article
ISSN
0538-8066

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โœฆ Synopsis

Reaction rate coefficients of methyl and ethyl nitrates with OH radicals were determined by the relative rate method in 1 atmosphere of oxygen. Reactions were initiated by the photochemical formation of OH radicals utilizing the reaction:

was obtained through a stationary photolysis of excess ozone in an experimental system under black light irradiation. Measurements were carried out for various combinations with different reference materials. Rate coefficients obtained were cm 3 mole-

ฯช13

(0.30 ฯฎ 0.032 (2) ฯซ 10 cule ฯช1 s ฯช1 (Temp.: 304-310 K) for methyl nitrate and cm 3 molecule ฯช1 s ฯช1

ฯช13

(2.0 ฯฎ 0.70) ฯซ 10 (298-310 K) for ethyl nitrate. For methyl nitrate, this data indicates the preference of a smaller rate coefficient between the two values reported in the literature [1,2], which have shown large discrepancies of more than one order of magnitude. For ethyl nitrate, only one measurement has been reported [2]. However, the present result suggests that the reported value was overestimated by a factor of more than two.

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