The effect of SO2 gas phase oxidation on hydroxyl smog chemistry

James F. Meagher; Kenneth J. Olszyna; Menachem Luria

doi:10.1016/0004-6981(84)90195-1

The effect of SO₂ gas phase oxidation on hydroxyl smog chemistry

James F. Meagher^*, Kenneth J. Olszyna, Menachem Luria

^*Corresponding author for this work

Fredy & Nadine Herrmann Institute of Earth Sciences

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

Abstract

A series of smog chamber experiments was conducted to investigate the effect of SO₂ on HO steady-state levels. Various amounts of SO₂ were added to propene-butane-NO_x-H₂O mixtures to simulate polluted air conditions. The addition of SO₂ was found to enhance slightly the rate of NO → NO₂ conversion with resultant increase in ozone formation. Although the addition of SO₂ did not reduce the HO steady state concentration during the early stages of the experiment, a significant (~ 40 %) reduction in HO steady-state concentration was observed at the highest ( ~ 6 ppm) SO₂ concentration during the latter stages. Model calculations were performed to test various mechanistic options. The model calculations indicate that the HO + SO₂ reaction leads predominantly to the production of HO₂ radicals. However, an additional O₃-consuming reaction is proposed to explain the experimental observations.

Original language	English
Pages (from-to)	2095-2104
Number of pages	10
Journal	Atmospheric Environment
Volume	18
Issue number	10
DOIs	https://doi.org/10.1016/0004-6981(84)90195-1
State	Published - 1984

Keywords

HSO aerosol
SO oxidation
hydroxyl radical
modeling
smog chamber

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10.1016/0004-6981(84)90195-1

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title = "The effect of SO2 gas phase oxidation on hydroxyl smog chemistry",

abstract = "A series of smog chamber experiments was conducted to investigate the effect of SO2 on HO steady-state levels. Various amounts of SO2 were added to propene-butane-NOx-H2O mixtures to simulate polluted air conditions. The addition of SO2 was found to enhance slightly the rate of NO → NO2 conversion with resultant increase in ozone formation. Although the addition of SO2 did not reduce the HO steady state concentration during the early stages of the experiment, a significant (~ 40 %) reduction in HO steady-state concentration was observed at the highest ( ~ 6 ppm) SO2 concentration during the latter stages. Model calculations were performed to test various mechanistic options. The model calculations indicate that the HO + SO2 reaction leads predominantly to the production of HO2 radicals. However, an additional O3-consuming reaction is proposed to explain the experimental observations.",

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AU - Meagher, James F.

AU - Olszyna, Kenneth J.

AU - Luria, Menachem

PY - 1984

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N2 - A series of smog chamber experiments was conducted to investigate the effect of SO2 on HO steady-state levels. Various amounts of SO2 were added to propene-butane-NOx-H2O mixtures to simulate polluted air conditions. The addition of SO2 was found to enhance slightly the rate of NO → NO2 conversion with resultant increase in ozone formation. Although the addition of SO2 did not reduce the HO steady state concentration during the early stages of the experiment, a significant (~ 40 %) reduction in HO steady-state concentration was observed at the highest ( ~ 6 ppm) SO2 concentration during the latter stages. Model calculations were performed to test various mechanistic options. The model calculations indicate that the HO + SO2 reaction leads predominantly to the production of HO2 radicals. However, an additional O3-consuming reaction is proposed to explain the experimental observations.

AB - A series of smog chamber experiments was conducted to investigate the effect of SO2 on HO steady-state levels. Various amounts of SO2 were added to propene-butane-NOx-H2O mixtures to simulate polluted air conditions. The addition of SO2 was found to enhance slightly the rate of NO → NO2 conversion with resultant increase in ozone formation. Although the addition of SO2 did not reduce the HO steady state concentration during the early stages of the experiment, a significant (~ 40 %) reduction in HO steady-state concentration was observed at the highest ( ~ 6 ppm) SO2 concentration during the latter stages. Model calculations were performed to test various mechanistic options. The model calculations indicate that the HO + SO2 reaction leads predominantly to the production of HO2 radicals. However, an additional O3-consuming reaction is proposed to explain the experimental observations.

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KW - SO oxidation

KW - hydroxyl radical

KW - modeling

KW - smog chamber

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The effect of SO₂ gas phase oxidation on hydroxyl smog chemistry

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Keywords

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