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Kinetics of the reaction of OH radicals with acetylene in 25–8000 torr of air at 296 K
Author(s) -
Sørensen M.,
Kaiser E. W.,
Hurley M. D.,
Wallington T. J.,
Nielsen O. J.
Publication year - 2003
Publication title -
international journal of chemical kinetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.341
H-Index - 68
eISSN - 1097-4601
pISSN - 0538-8066
DOI - 10.1002/kin.10119
Subject(s) - torr , chemistry , radical , diluent , acetylene , kinetics , molecule , analytical chemistry (journal) , total pressure , kinetic energy , atmospheric pressure , organic chemistry , thermodynamics , physics , quantum mechanics , oceanography , geology
Relative rate techniques were used to study the kinetics of the reaction of OH radicals with acetylene at 296 K in 25–8000 Torr of air, N 2 /O 2 , or O 2 diluent. Results obtained at total pressures of 25–750 Torr were in good agreement with the literature data. At pressures >3000 Torr, our results were substantially (∼35%) lower than that reported previously. The kinetic data obtained over the pressure range 25–8000 Torr are well described (within 15%) by the Troe expression using k o = (2.92 ± 0.55) × 10 −30 cm 6 molecule −2 s −1 , k ∞ = (9.69 ± 0.30) × 10 −13 cm 3 molecule −1 s −1 , and F c = 0.60. At 760 Torr total pressure, this expression gives k OH+C 2 H 2= 8.49 × 10 −13 cm molecule −1 s −1 . © 2003 Wiley Periodicals, Inc. Int J Chem Kinet 35: 191–197, 2003