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Titolo:
Ozone formation with (V)UV-enhanced dielectric barrier discharges in dry and humid gas mixtures of O-2, N-2/O-2, and Ar/O-2
Autore:
Falkenstein, Z;
Indirizzi:
Univ Calif Los Alamos Natl Lab, Los Alamos, NM 87545 USA Univ Calif Los Alamos Natl Lab Los Alamos NM USA 87545 amos, NM 87545 USA
Titolo Testata:
OZONE-SCIENCE & ENGINEERING
fascicolo: 6, volume: 21, anno: 1999,
pagine: 583 - 603
SICI:
0191-9512(199912)21:6<583:OFW(DB>2.0.ZU;2-C
Fonte:
ISI
Lingua:
ENG
Soggetto:
ULTRAVIOLET ILLUMINATION; ATMOSPHERIC CHEMISTRY; PHOTOCHEMICAL DATA; ORGANIC-COMPOUNDS; LIGHT-SOURCE; GENERATION; MECHANISMS; OXIDATION; KINETICS; PLASMAS;
Keywords:
ozone; (V)UV dielectric barrier discharge; singlet oxygen; photochemical decomposition; excimer; Joshi effect; humid gas mixtures; hydroxyl radical formation; oxygen; nitrogen; argon;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
44
Recensione:
Indirizzi per estratti:
Indirizzo: Falkenstein, Z GE, Corp Res & Dev, Lighting Syst Grp, Niskayuna, NY 12309 USA GE Niskayuna NY USA 12309 yst Grp, Niskayuna, NY 12309 USA
Citazione:
Z. Falkenstein, "Ozone formation with (V)UV-enhanced dielectric barrier discharges in dry and humid gas mixtures of O-2, N-2/O-2, and Ar/O-2", OZONE-SCI E, 21(6), 1999, pp. 583-603

Abstract

The effect of (V)UV illumination at 172 nm and 253.7 nm on ozone formationwith dielectric barrier discharges in air-like mixtures of nitrogen/oxygenand argon/oxygen as function of the water concentration is presented. Although (V)UV at these wavelengths efficiently cleaves ozone, the ozone concentration in a combined (V)UV/dielectric barrier discharge in oxygen-containing gases is reduced only very little. This corresponds to an enhanced concentration of atomic singlet oxygen, which, in presence of water, increases the production of hydroxyl radicals. This is confirmed by measurements of the removal rates of 2-propanol and of its byproducts in dry and humid air ina combined (V)UV/dielectric barrier discharge treatment.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/09/20 alle ore 07:40:52