Yield of HO2 Radicals in the OH-Initiated Oxidation of SO2-Reference-Cited by-同舟云学术

Yield of HO2 Radicals in the OH-Initiated Oxidation of SO2

Published:2011-09-23 Issue:9-10 Volume:225 Page:1105-1115
ISSN:2196-7156
Container-title:Zeitschrift für Physikalische Chemie
language:en
Short-container-title:

Author:

Jain Chaithanya¹,Schoemaecker Coralie¹,Fittschen Christa

Affiliation:

1. Université Lille Nord de France, Physico-Chimie des Processus de Combustion, Villeneuve d'Ascq Cedex, Frankreich

Abstract

Abstract The HO2 radical yield in the OH initiated oxidation of SO2 has been determined by direct observation of HO2 concentration time profiles following the 248 nm photolysis of H2O2/SO2/O2 mixtures. Initial OH radical concentrations have been deduced from a fit of the absolute HO2 concentration time profiles after 248 nm photolysis of H2O2 in the absence of SO2, an increase in the HO2 concentration upon addition of SO2 to this reaction mixture is observed and can be explained by a decrease of HO x -radical losses due to a faster decay of OH radicals in the presence of SO2. Simulations of theses profiles using recommended rate constants in a simple model are in agreement with an HO2-yield of 1.0 ± 0.1 from the OH initiated oxidation of SO2.

Publisher

Walter de Gruyter GmbH

Subject

Physical and Theoretical Chemistry

Link

https://www.degruyter.com/document/doi/10.1524/zpch.2011.0169/pdf

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