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Re-evaluation of the reaction rate coefficient of CH3Br + OH with implications for the atmospheric budget of methyl bromide

Heimdal Nilsson, Elna LU orcid ; Joelsson, L. M. T. ; Heimdal, J. ; Johnson, M. S. and Nielsen, O. J. (2013) In Atmospheric Environment 80. p.70-74
Abstract
The reaction rate coefficient k(CH3Br + OH) has been determined in the temperature range 298-373 K, using pulse radiolysis/UV kinetic spectroscopy, and at 298 K using a relative rate method. The Arrhenius expression obtained from a fit to the experimental results is (2.9 +/- 0.9) x 10(-12) exp(-(1230 +/- 125)/T) cm(3) molecule(-1) s(-1), which is greater than the expression currently recommended. The relative rate experiments give k(298 K) = (4.13 +/- 0.63) x 10(-14) cm(3) molecule(-1) s(-1). The results of the absolute and relative rate experiments indicate that the source budget of atmospheric CH3Br should be reinvestigated, as was recently done for CH3Cl. (C) 2013 Elsevier Ltd. All rights reserved.
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author
; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Methyl bromide, Atmospheric chemistry, Reaction kinetics
in
Atmospheric Environment
volume
80
pages
70 - 74
publisher
Elsevier
external identifiers
  • wos:000328094800008
  • scopus:84883008935
ISSN
1352-2310
DOI
10.1016/j.atmosenv.2013.07.046
language
English
LU publication?
yes
id
0fe84c15-57b0-446f-8f9e-184a7e9eb4e8 (old id 4272731)
date added to LUP
2016-04-01 13:04:39
date last changed
2022-03-29 05:23:13
@article{0fe84c15-57b0-446f-8f9e-184a7e9eb4e8,
  abstract     = {{The reaction rate coefficient k(CH3Br + OH) has been determined in the temperature range 298-373 K, using pulse radiolysis/UV kinetic spectroscopy, and at 298 K using a relative rate method. The Arrhenius expression obtained from a fit to the experimental results is (2.9 +/- 0.9) x 10(-12) exp(-(1230 +/- 125)/T) cm(3) molecule(-1) s(-1), which is greater than the expression currently recommended. The relative rate experiments give k(298 K) = (4.13 +/- 0.63) x 10(-14) cm(3) molecule(-1) s(-1). The results of the absolute and relative rate experiments indicate that the source budget of atmospheric CH3Br should be reinvestigated, as was recently done for CH3Cl. (C) 2013 Elsevier Ltd. All rights reserved.}},
  author       = {{Heimdal Nilsson, Elna and Joelsson, L. M. T. and Heimdal, J. and Johnson, M. S. and Nielsen, O. J.}},
  issn         = {{1352-2310}},
  keywords     = {{Methyl bromide; Atmospheric chemistry; Reaction kinetics}},
  language     = {{eng}},
  pages        = {{70--74}},
  publisher    = {{Elsevier}},
  series       = {{Atmospheric Environment}},
  title        = {{Re-evaluation of the reaction rate coefficient of CH3Br + OH with implications for the atmospheric budget of methyl bromide}},
  url          = {{http://dx.doi.org/10.1016/j.atmosenv.2013.07.046}},
  doi          = {{10.1016/j.atmosenv.2013.07.046}},
  volume       = {{80}},
  year         = {{2013}},
}