Direct kinetics study of the temperature dependence of the CH2O branching channel for the CH3O2 + HO2 reaction

Title:
Direct kinetics study of the temperature dependence of the CH2O branching channel for the CH3O2 + HO2 reaction
Authors:
Elrod, Matthew J.; Ranschaert, Dana L.; Schneider, Nicholas J.
Abstract:
A direct kinetics study of the temperature dependence of the CH2O branching channel for the CH3O2 + HO2 reaction has been performed using the turbulent flow technique with high-pressure chemical ionization mass spectrometry for the detection of reactants and products. The temperature dependence of the CH2O-producing channel rate constant was investigated between 298 and 218 K at a pressure of 100 Torr, and the data were fitted to the following Arrhenius expression: 1.6−0.7+1.0 × 10−15 × exp[(1730 ± 130)/T]; cm3 molecule−1 s−1. Using the Arrhenius expression for the overall rate of the CH3O2 + HO2 reaction and this result, the 298 K branching ratio for the CH2O producing channel is measured to be 0.11, and the branching ratio is calculated to increase to a value of 0.31 at 218 K, the lowest temperature accessed in this study. The results are compared to the analogous CH3O2 + CH3O2 reaction and the potential atmospheric ramifications of significant CH2O production from the CH3O2 + HO2 reaction are discussed.
Citation:
Elrod, M.J., D.L. Ranschaert, and N.J. Schneider. 2001. "Direct Kinetics Study of the Temperature Dependence of the CH2O Branching Channel for the CH3O2 + HO2 Reaction." International Journal of Chemical Kinetics. 33(6): 363-376.
Publisher:
John Wiley & Sons
DATE ISSUED:
2001-06
Department:
Chemistry
Type:
article
PUBLISHED VERSION:
10.1002/kin.1030
PERMANENT LINK:
http://hdl.handle.net/11282/309792

Full metadata record

DC FieldValue Language
dc.contributor.authorElrod, Matthew J.en_US
dc.contributor.authorRanschaert, Dana L.en_US
dc.contributor.authorSchneider, Nicholas J.en_US
dc.date.accessioned2013-12-23T16:17:56Zen
dc.date.available2013-12-23T16:17:56Zen
dc.date.issued2001-06en
dc.identifier.citationElrod, M.J., D.L. Ranschaert, and N.J. Schneider. 2001. "Direct Kinetics Study of the Temperature Dependence of the CH2O Branching Channel for the CH3O2 + HO2 Reaction." International Journal of Chemical Kinetics. 33(6): 363-376.en_US
dc.identifier.issn0538-8066en_US
dc.identifier.urihttp://hdl.handle.net/11282/309792en
dc.description.abstractA direct kinetics study of the temperature dependence of the CH2O branching channel for the CH3O2 + HO2 reaction has been performed using the turbulent flow technique with high-pressure chemical ionization mass spectrometry for the detection of reactants and products. The temperature dependence of the CH2O-producing channel rate constant was investigated between 298 and 218 K at a pressure of 100 Torr, and the data were fitted to the following Arrhenius expression: 1.6−0.7+1.0 × 10−15 × exp[(1730 ± 130)/T]; cm3 molecule−1 s−1. Using the Arrhenius expression for the overall rate of the CH3O2 + HO2 reaction and this result, the 298 K branching ratio for the CH2O producing channel is measured to be 0.11, and the branching ratio is calculated to increase to a value of 0.31 at 218 K, the lowest temperature accessed in this study. The results are compared to the analogous CH3O2 + CH3O2 reaction and the potential atmospheric ramifications of significant CH2O production from the CH3O2 + HO2 reaction are discussed.en_US
dc.language.isoen_USen_US
dc.publisherJohn Wiley & Sonsen_US
dc.identifier.doi10.1002/kin.1030en
dc.subject.departmentChemistryen_US
dc.titleDirect kinetics study of the temperature dependence of the CH2O branching channel for the CH3O2 + HO2 reactionen_US
dc.typearticleen_US
dc.identifier.journalInternational Journal of Chemical Kineticsen_US
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