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Respeciation of Organic Gas Emissions and the Detection of Excess Unburned Gasoline in the Atmosphere

Harley, Robert A. and Hannigan, Michael P. and Cass, Glen R. (1992) Respeciation of Organic Gas Emissions and the Detection of Excess Unburned Gasoline in the Atmosphere. Environmental Science and Technology, 26 (12). pp. 2395-2408. ISSN 0013-936X. doi:10.1021/es00036a010.

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The development of a set of organic gas composition profiles for key source categories is described. This information is used to recompute the organic gas emission inventory for the Los Angeles area. Comparisons are made between the revised emission inventory and ambient concentration measurements in southern California. Respeciation of the organic gas emissions results in large changes in the basinwide emissions estimates for many individual organic species, including l,3-butadiene, ethylene glycol, methanol, and cyclohexane. Significant changes are observed in the reactivity of the chemical composition profiles for individual source categories, especially for surface-coating activities and associated thinning solvent use. Receptor-modeling methods are used to identify the relative importance of major sources that contribute to atmospheric organic gas concentrations in southern California. The receptor modeling results indicate a key discrepancy between the emission inventory and ambient data: there is much more unburned gasoline in the atmosphere than is indicated in the emission inventory. These excess unburned gasoline emissions may be coming from a combination of sources including tailpipe emissions, hot-soak evaporative emissions, and fuel spillage.

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Additional Information:© 1992 American Chemical Society. Received for review April 21, 1992. Revised manuscript received July 28, 1992. Accepted August 3, 1992. This work was supported by the Electric Power Research Institute under Agreement RP3189-3. The authors gratefully acknowledge the assistance of Paul Allen and Doug Lawson of the California Air Resources Board in supplying supplemental data. The authors also thank Larry Rapp of ARCO and Fred Stump of EPA for supplying vehicle exhaust speciation data, and Robert Wendoll of Dunn-Edwards Co. for helpful discussions and supplemental data relating to architectural surface coatings.
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Electric Power Research Institute (EPRI)RP3189-3
Issue or Number:12
Record Number:CaltechAUTHORS:20160629-112916634
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Official Citation:Respeciation of organic gas emissions and the detection of excess unburned gasoline in the atmosphere Robert A. Harley, Michael P. Hannigan, and Glen R. Cass Environmental Science & Technology 1992 26 (12), 2395-2408 DOI: 10.1021/es00036a010
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:68744
Deposited By: Ruth Sustaita
Deposited On:29 Jun 2016 20:28
Last Modified:11 Nov 2021 04:04

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