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Titolo:
INHIBITION OF ODD OXYGEN PRODUCTION IN THE CARBON BOND 4 AND GENERIC REACTION SET MECHANISMS
Autore:
TONNESEN S; JEFFRIES HE;
Indirizzi:
UNIV N CAROLINA,DEPT ENVIRONM SCI & ENGN CHAPEL HILL NC 27599 UNIV N CAROLINA,DEPT ENVIRONM SCI & ENGN CHAPEL HILL NC 27599
Titolo Testata:
Atmospheric environment
fascicolo: 7, volume: 28, anno: 1994,
pagine: 1339 - 1349
SICI:
1352-2310(1994)28:7<1339:IOOOPI>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
SMOG REACTION-MECHANISMS;
Keywords:
OZONE; ISOPLETH; PROCESS; PHOTOCHEMISTRY; REACTIVITY; INHIBITION; NITROGEN OXIDES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
13
Recensione:
Indirizzi per estratti:
Citazione:
S. Tonnesen e H.E. Jeffries, "INHIBITION OF ODD OXYGEN PRODUCTION IN THE CARBON BOND 4 AND GENERIC REACTION SET MECHANISMS", Atmospheric environment, 28(7), 1994, pp. 1339-1349

Abstract

Outdoor smog chamber experiments have been conducted by researchers in Australia at lower initial NO(x) and VOC-to-NO(x) ratios than those chamber experiments which were used to formulate photochemical reaction mechanisms such as the Carbon Bond Four (CB4). When the Australians simulated their experiments with CB4, they found that CB4 underpredicted ozone production at low VOC-to-NO(x) ratios, i.e. in the NO(x)-richregion of the ozone isopleth diagram above the ridge line. CB4 predicts a significant NO(x) inhibition in this region whereas the empiricalGeneral Reaction Set (GRS) mechanism, which was developed by the Australian researchers to fit their data, does not. In this study, a mass balance and process analysis technique is used to explain the origins of the NO(x)-inhibition in CB4 simulations. The causes are determined to be in the inorganic reactions of the CB4, which are believed to be both complete and well-known. The primary cause was a strong negative feedback of new radical production from the photolysis of ozone which occurred because of the longer delay needed to oxidize the higher initial NO. The CB4 mechanism could still be incorrect if it is missing a strong radical source, for example, in the poorly understood aromaticschemistry. The GRS, which lacks representation of the inorganic processes responsible for NO(x)-inhibition, may be achieving its predictiveaccuracy by compensating errors. If this is true, then the GRS would be unsatisfactory for ambient air use. Additional smog chamber experiments at low VOC-to-NO(x) ratios and better characterization of the Australian chambers are needed to resolve the discrepancy in CB4 and GRS predictions.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 01/10/20 alle ore 04:26:33