Reactions of ozone with. alpha. -pinene and. beta. -pinene in air: Yields of gaseous and particulate products

Journal Article · Wed Sep 20 00:00:00 EDT 1989 · Journal of Geophysical Research; (USA)

DOI:https://doi.org/10.1029/JD094iD10p13013· OSTI ID:5360993

Hatakeyama, S; Izumi, K; Fukuyama, T; Akimoto, H ^[1]

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1. Division of Atmospheric Environment, National Institute for Environmental Studies, Tsukuba, Ibaraki, Japan (JP)

Reactions of ozone with {alpha}-prinene and {beta}-pinene were studied for the purpose of obtaining the quantitative yields of gaseous and particulate products. Major gaseous products from {alpha}-pinene were CO, CO{sub 2}, HCHO, and aldehydes mainly composed of pinonaldehyde and nor-pinonaldehyde, while those from {beta}-pinene were CO{sub 2}, HCHO, and 6,6-dimethylbicyclo(3.1.1)heptan-2-one. Average molar yields from {alpha}-pinene were CO; 9{plus minus}1%, CO{sub 2}; 30{plus minus}2%, HCHO; 22{plus minus}1%, and aldehydes; 51{plus minus}6%. Average molar yields from {beta}-pinene were CO{sub 2}; 27{plus minus}2%, HCHO; 76{plus minus}2%, and 6,6-dimethylbicyclo(3.1.1)heptan-2-one; 40{plus minus}2%. Particulate products were found to include pinonaldehyde, nor-pinonaldehyde, pinonic acid, and nor-pinonic acid from {alpha}-pinene. The yields of the particulate aldehydes decreased with the reaction time, whereas the yields of the acids increased. This observation suggests the sequential oxidation of aldehydes to carboxylic acids. From {beta}-pinene, only 6,6-dimethylbicyclo(3.1.1)heptan-2-one was identified as a particulate product. For {alpha}-pinene, most of the products are explainable in terms of the reaction mechanism similar to that for the cyclohexene/ozone reaction, whereas for {beta}-pinene the principal reaction path is that of the doubly substituted Criegee intermediate. The total yields of organic aerosols from both {alpha}- and {beta}-pinene were measured with their concentrations at a lower ppb level. The yields were found almost constant in a pinene concentration range from 10 up to 100 ppb, being 18.3{plus minus}1.1 and 13.8{plus minus}0.8% for {alpha}- and {beta}-pinene, respectively, which are much lower than the previously reported values. {copyright} American Geophysical Union 1989

• OSTI ID: 5360993
• Journal Information: Journal of Geophysical Research; (USA), Vol. 94:D10; ISSN 0148-0227
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
OZONE
ATMOSPHERIC CHEMISTRY
TERPENES
AEROSOLS
AIR POLLUTION MONITORING
CARBON DIOXIDE
CARBON MONOXIDE
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
FORMALDEHYDE
METHANE
OXIDATION
PARTICULATES
ALDEHYDES
ALKANES
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMISTRY
COLLOIDS
DISPERSIONS
HYDROCARBONS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PARTICLES
SOLS
YIELDS
540120* - Environment
Atmospheric- Chemicals Monitoring & Transport- (1990-)