Rate coefficients for the gas-phase reaction of hydroxyl radicals with the dimethylbenzaldehydes

2006 ◽  
Vol 38 (9) ◽  
pp. 563-569 ◽  
Author(s):  
Grainne M. Clifford ◽  
John C. Wenger
Keyword(s):  
Gas Phase ◽  
Hydroxyl Radicals ◽  
Rate Coefficients ◽  
Phase Reaction ◽  
Gas Phase Reaction

scholarly journals Reactive quenching of electronically excited NO<sub>2</sub><sup>∗</sup> and NO<sub>3</sub><sup>∗</sup> by H<sub>2</sub>O as potential sources of atmospheric HO<sub><i>x</i></sub> radicals

2018 ◽  
Vol 18 (19) ◽  
pp. 14005-14015 ◽  
Author(s):  
Terry J. Dillon ◽  
John N. Crowley
Keyword(s):  
Gas Phase ◽  
Laser Excitation ◽  
Pulsed Laser ◽  
Work Rate ◽  
Rate Coefficients ◽  
Phase Reaction ◽  
Gas Phase Reaction ◽  
Upper Limit ◽  
Upper Limits ◽  
Electronically Excited

Abstract. Pulsed laser excitation of NO2 (532–647 nm) or NO3 (623–662 nm) in the presence of H2O was used to initiate the gas-phase reaction NO2∗+H2O → products (Reaction R5) and NO3∗+H2O → products (Reaction R12). No evidence for OH production in Reactions (R5) or (R12) was observed and upper limits for OH production of k5b/k5<1×10-5 and k12b/k12<0.03 were assigned. The upper limit for k5b∕k5 renders this reaction insignificant as a source of OH in the atmosphere and extends the studies (Crowley and Carl, 1997; Carr et al., 2009; Amedro et al., 2011) which demonstrate that the previously reported large OH yield by Li et al. (2008) was erroneous. The upper limit obtained for k12b∕k12 indicates that non-reactive energy transfer is the dominant mechanism for Reaction (R12), though generation of small but significant amounts of atmospheric HOx and HONO cannot be ruled out. In the course of this work, rate coefficients for overall removal of NO3∗ by N2 (Reaction R10) and by H2O (Reaction R12) were determined: k10=(2.1±0.1)×10-11 cm3 molecule−1 s−1 and k12=(1.6±0.3)×10-10 cm3 molecule−1 s−1. Our value of k12 is more than a factor of 4 smaller than the single previously reported value.

scholarly journals Direct and relative rate coefficients for the gas-phase reaction of OH radicals with 2-methyltetrahydrofuran at room temperature

2016 ◽  
Vol 119 (1) ◽  
pp. 5-18
Author(s):  
Ádám Illés ◽  
Mária Farkas ◽  
Gábor László Zügner ◽  
Gyula Novodárszki ◽  
Magdolna Mihályi ◽  
...  
Keyword(s):  
Gas Phase ◽  
Room Temperature ◽  
Relative Rate ◽  
Rate Coefficients ◽  
Oh Radicals ◽  
Phase Reaction ◽  
Gas Phase Reaction ◽  
Relative Rate Coefficients

A continuous stirred tank reactor investigation of the gas-phase reaction of hydroxyl radicals and toluene

1985 ◽  
Vol 17 (9) ◽  
pp. 931-955 ◽  
Author(s):  
Michael W. Gery ◽  
Donald L. Fox ◽  
Harvey E. Jeffries ◽  
Leonard Stockburger ◽  
Walter S. Weathers
Keyword(s):  
Gas Phase ◽  
Hydroxyl Radicals ◽  
Stirred Tank ◽  
Phase Reaction ◽  
Continuous Stirred Tank Reactor ◽  
Stirred Tank Reactor ◽  
Gas Phase Reaction ◽  
Tank Reactor ◽  
Continuous Stirred Tank

Gas-phase reaction of hydroxyl radicals withm-,o- andp-cresol

2006 ◽  
Vol 38 (9) ◽  
pp. 553-562 ◽  
Author(s):  
Cecile Coeur-Tourneur ◽  
Françoise Henry ◽  
Marie-Andrée Janquin ◽  
Laurent Brutier
Keyword(s):  
Gas Phase ◽  
Hydroxyl Radicals ◽  
Phase Reaction ◽  
Gas Phase Reaction
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