Atmospheric oxidation of biogenic hydrocarbons: Reaction of ozone with β- pinene, D-limonene and trans-caryophyllene

D. Grosjean, E. L. Williams, E. Grosjean, Jean M. Andino, J. H. Seinfeld

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Abstract

Several gas-phase carbonyl products of two terpenes, β-pinene and D- limonene, and of the sesquiterpene, trans-caryophyllene, have been identified and their concentrations measured in experiments involving the reaction of these unsaturated biogenic hydrocarbons with ozone in the dark. Cyclohexane was added as a scavenger for the hydroxyl radical to minimize interferences from OH, which forms as a product of the ozone-hydrocarbon reaction. Carbonyl products were formaldehyde (yield = 0.42) and nopinone (yield = 0.22) from β-pinene, formaldehyde (yield = 0.10) and 4-acetyl-1-methylcyclohexene from D-limonene, and formaldehyde (yield 0.08) from trans-caryophyllene. The nature and yields of these products are discussed in terms of the ozone- olefin reaction mechanism. The ozone-β-pinene reaction rate constant, measured in the presence of cyclohexane, is 12.2 ± 1.3 x 10-18 cm3 molecule-1 s-1 at 22 ± 1 °C. Carbonyl products have also been identified in exploratory experiments with trans-caryophyllene and NO in sunlight.

Original languageEnglish
Pages (from-to)2754-2758
Number of pages5
JournalEnvironmental Science and Technology
Volume27
Issue number13
DOIs
Publication statusPublished - Dec 1993

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ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Science(all)
  • Environmental Chemistry
  • Earth and Planetary Sciences(all)

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