Hydroxyl and hydroperoxyl radicals: Their role in smog photochemistry and their atmospheric measurement

Conference · Thu Sep 01 00:00:00 EDT 1988 · Preprints of Papers Presented at National Meeting, Division of Water, Air and Waste Chemistry, American Chemical Society; (USA)

OSTI ID:7166226

O'Brien, R J; Theisen, J W; Pan, W H; Hard, T M; Chan, C Y; Mehrabzadeh, A A ^[1]

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1. Portland State Univ., OR (USA)

A simple chemical model is sufficient to roughly quantify the role of hydroxyl and hydroperoxyl radicals in the formation of ozone from photooxidation of hydrocarbons and oxides of nitrogen: (1) HC + HO {yields} {sup k{sub 1}} P + a HO{sub 2}; (2) P + HO {yields} {sup k{sub 2}} b HO{sub 2}; (3) HO{sub 2} + NO {yields} NO{sub 2} + HO; (4) NO{sub 2} + hv {yields} {sup O{sub 2}} NO + O{sub 3} (5) NO + O{sub 3} {yields} NO{sub 2} + O{sub 2}; (6) everything {yields}{sup k{sub d}} dilution. Here HC is any hydrocarbon and a and b are effective stoichiometric coefficients which describe the number of peroxy radicals formed in the oxidation of the individual hydrocarbon and of its lumped oxidation product, P. Peroxy radicals RO{sub 2} and HO{sub 2} are interchangable in this model. The authors have begun a program of characterizing the hydroxyl and hydroperoxyl radical concentrations in polluted and clean air using their FAGE technique. Data obtained in downtown Portland, Oregon, are shown. Additional data will be presented at the meeting and compared with the predictions of a wider complement of photochemical models.

• OSTI ID: 7166226
• Report Number(s): CONF-8909232-; CODEN: ACWCA
• Journal Information: Preprints of Papers Presented at National Meeting, Division of Water, Air and Waste Chemistry, American Chemical Society; (USA), Vol. 28:2; Conference: 8. Japan - United States Governmental conference on solid waste management, Honolulu, HI (USA), 6-7 Sep 1989; ISSN 0099-7293
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
HYDROPEROXY RADICALS
AIR POLLUTION MONITORING
ATMOSPHERIC CHEMISTRY
HYDROXYL RADICALS
OZONE
ECOLOGICAL CONCENTRATION
AIR POLLUTION
MATHEMATICAL MODELS
MEASURING METHODS
OREGON
PHOTOCHEMISTRY
SMOG
CHEMISTRY
FEDERAL REGION X
NORTH AMERICA
POLLUTION
RADICALS
USA
540120* - Environment
Atmospheric- Chemicals Monitoring & Transport- (1990-)