Effects of fine aerosol composition on the rate constants of OH initiated gas-phase reactions

Sewon Oh, Jean M. Andino

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The effects of atmospheric aerosols on the gas-phase reactions of OH radicals with organic compounds were studied. Three different types of organics were selected, i.e., alkane (n-hexane), aromatics (p-xylene), and oxygenate (1-propanol). The relative rates calculated using the recommended rate constants were 0.99, 0.39, and 0.39 for 1-propanol/n-hexane, n-hexane/p-xylene, and 1-propanol/p-xylene, respectively. The relative rate increased by ≈ 26%, from 0.85 in the absence of aerosols, to 1.07 in the presence of ammonium sulfate aerosols, indicating that ammonium sulfate aerosols promoted significantly the reaction of 1-propanol with OH radicals as compared to n-hexane. No influence on the relative rate of n-hexane/p-xylene was observed. The influence of aerosol on tropospheric reactions depended on both the aerosol composition and the type of organic compound.

Original languageEnglish
Title of host publicationACS National Meeting Book of Abstracts
Pages375-378
Number of pages4
Volume40
Edition2
Publication statusPublished - 2000
Event220th ACS National Meeting - Wastington, DC, United States
Duration: Aug 20 2000Aug 24 2000

Other

Other220th ACS National Meeting
CountryUnited States
CityWastington, DC
Period8/20/008/24/00

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ASJC Scopus subject areas

  • Chemistry(all)

Cite this

Oh, S., & Andino, J. M. (2000). Effects of fine aerosol composition on the rate constants of OH initiated gas-phase reactions. In ACS National Meeting Book of Abstracts (2 ed., Vol. 40, pp. 375-378)