Kinetic studies of the OH-inititated reactions of selected alcohols in the presences of fine aerosols: Effects of aerosol composition

Sewon Oh, Jean Andino

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

Abstract

Organic compounds in the troposphere are capable of reacting with O 3, OH radicals, and NO 3 radicals. However, the reaction with OH radicals is the major gas-phase atmospheric loss process for hydrocarbons in the daytime. A study was carried out to determine the effects of atmospheric aerosols on the gas-phase reactions of OH radicals with methanol, ethanol, and 1-propanol, and to determine which aerosol constituent(s) has the most profound effect on the kinetics of the OH/alcohol reaction. There was no significant difference between data obtained in the presence vs. the absence of NO. Ammonium sulfate aerosols were the only aerosols that affected the relative rate of 1-propanol/p-xylene/OH system in the presence of the lower aerosol surface area. However, once the available surface area was approximately doubled, ammonium nitrate and ammonium chloride aerosols also affected the relative rate for 1-propanol vs. p-xylene. The ammonium ion was the dominant ion influencing the relative rate constant for the 1-propanol system. The influences of aerosols on the kinetics of 1-propanol/•OH reaction depended on both the composition and concentration of aerosols.

Original languageEnglish (US)
Title of host publicationACS National Meeting Book of Abstracts
Pages1237-1241
Number of pages5
Volume41
Edition1
StatePublished - 2001
Externally publishedYes
Event221st ACS National Meeting - San Diego, CA, United States
Duration: Apr 1 2001Apr 5 2001

Other

Other221st ACS National Meeting
CountryUnited States
CitySan Diego, CA
Period4/1/014/5/01

ASJC Scopus subject areas

  • Chemistry(all)

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