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A study of the ethene-ozone reaction with photoelectron spectroscopy: measurement of product branching ratios and atmospheric implications

A study of the ethene-ozone reaction with photoelectron spectroscopy: measurement of product branching ratios and atmospheric implications
A study of the ethene-ozone reaction with photoelectron spectroscopy: measurement of product branching ratios and atmospheric implications
The ozone-ethene reaction has been investigated at low pressure in a flow-tube interfaced to a u.v. photoelectron spectrometer. Photoelectron spectra recorded as a function of reaction time have been used to estimate partial pressures of the reagents and products, using photoionization cross-sections for selected photoelectron bands of the reagents and products, which have been measured separately. Product yields compare favourably with results of other studies, and the production of oxygen and acetaldehyde have been measured as a function of time for the first time. A reaction scheme developed for the ozone-ethene reaction has been used to simulate the reagents and products as a function of time. The results obtained are in good agreement with the experimental measurements. For each of the observed products, the simulations allow the main reaction (or reactions) for production of that product to be established. The product yields have been used in a global model to estimate their global annual emissions in the atmosphere. Of particular interest are the calculated global annual emissions of formaldehyde (0.96 ± 0.10 Tg) and formic acid, (0.05 ± 0.01 Tg) which are estimated as 0.04% and 0.7% of the total annual emission respectively
1463-9076
14839-14847
Copeland, Grant
1adc6e1f-c40d-4a4d-93e1-91b1900eeb60
Ghosh, Mariana V.
210ab8df-8389-4bf5-9622-9931cc4a9f81
Shallcross, Dudley E.
2beaf7e0-0b00-47d7-86c0-b60470cd6f35
Percival, Carl J.
f819a683-66a0-4ad4-b290-2c99f68dedbc
Dyke, John M.
46393b45-6694-46f3-af20-d7369d26199f
Copeland, Grant
1adc6e1f-c40d-4a4d-93e1-91b1900eeb60
Ghosh, Mariana V.
210ab8df-8389-4bf5-9622-9931cc4a9f81
Shallcross, Dudley E.
2beaf7e0-0b00-47d7-86c0-b60470cd6f35
Percival, Carl J.
f819a683-66a0-4ad4-b290-2c99f68dedbc
Dyke, John M.
46393b45-6694-46f3-af20-d7369d26199f

Copeland, Grant, Ghosh, Mariana V., Shallcross, Dudley E., Percival, Carl J. and Dyke, John M. (2011) A study of the ethene-ozone reaction with photoelectron spectroscopy: measurement of product branching ratios and atmospheric implications. Physical Chemistry Chemical Physics, 13, 14839-14847. (doi:10.1039/C0CP03004J).

Record type: Article

Abstract

The ozone-ethene reaction has been investigated at low pressure in a flow-tube interfaced to a u.v. photoelectron spectrometer. Photoelectron spectra recorded as a function of reaction time have been used to estimate partial pressures of the reagents and products, using photoionization cross-sections for selected photoelectron bands of the reagents and products, which have been measured separately. Product yields compare favourably with results of other studies, and the production of oxygen and acetaldehyde have been measured as a function of time for the first time. A reaction scheme developed for the ozone-ethene reaction has been used to simulate the reagents and products as a function of time. The results obtained are in good agreement with the experimental measurements. For each of the observed products, the simulations allow the main reaction (or reactions) for production of that product to be established. The product yields have been used in a global model to estimate their global annual emissions in the atmosphere. Of particular interest are the calculated global annual emissions of formaldehyde (0.96 ± 0.10 Tg) and formic acid, (0.05 ± 0.01 Tg) which are estimated as 0.04% and 0.7% of the total annual emission respectively

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Published date: June 2011
Organisations: Chemistry

Identifiers

Local EPrints ID: 197815
URI: http://eprints.soton.ac.uk/id/eprint/197815
ISSN: 1463-9076
PURE UUID: 1d0a5e75-9b14-43a1-a778-39d1c8b10b07
ORCID for John M. Dyke: ORCID iD orcid.org/0000-0002-9808-303X

Catalogue record

Date deposited: 28 Sep 2011 07:48
Last modified: 20 Jul 2019 01:27

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