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Titolo:
IR INVESTIGATION OF SELECTIVE REDUCTION OF NO BY ETHENE ON CU-ZSM-5
Autore:
TABATA T; OHTSUKA H; KOKITSU M; OKADA O;
Indirizzi:
OSAKA GAS CO LTD,FUNDAMENTAL RES LABS,KONOHANA KU,TORISHIMA 6-19-9 OSAKA 554 JAPAN
Titolo Testata:
Bulletin of the Chemical Society of Japan
fascicolo: 7, volume: 68, anno: 1995,
pagine: 1905 - 1914
SICI:
0009-2673(1995)68:7<1905:IIOSRO>2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Soggetto:
OXYGEN-RICH ATMOSPHERES; NITRIC-OXIDE; NITROGEN-OXIDES; CARBON-MONOXIDE; COPPER OXIDE; CATALYSTS; HYDROCARBONS; DIOXIDE; ZEOLITE; PROPENE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
38
Recensione:
Indirizzi per estratti:
Citazione:
T. Tabata et al., "IR INVESTIGATION OF SELECTIVE REDUCTION OF NO BY ETHENE ON CU-ZSM-5", Bulletin of the Chemical Society of Japan, 68(7), 1995, pp. 1905-1914

Abstract

Adsorbed species during the reaction of selective catalytic reductionof NOx by hydrocarbons (HC-SCR) on Cu ion-exchanged ZSM-5 (Cu-ZSM-5) were investigated by in situ FT-IR using isotopes as well as gas phaseanalysis. No oxygen-containing species was observed by IR and no reaction proceeded in the presence of gaseous O-2 and C2H4 below 473 K, atwhich HC-SCR occurs. However, an extra NOx species (tentatively assigned to organic nitrite or nitrate species), other than inorganic NOx species derived from O-2 and NO, appeared very rapidly in IR at 1670 cm(-1) at room temperature, in the presence of adsorbed NO2 species, gaseous C2H4 and NO. Afterwards, a carbonyl species (1677 cm(-1)) was formed gradually at room temperature. When the extra NOx species was observed, N-2 and N2O evolved even at room temperature, therefore, the extra NOx species is considered to be related to HC-SCR. In the O-2+C2H4+NO reaction at 473 K, no nitrogen-containing species, except for quitea small amount of nitrile (2168 cm(-1)), was observed in IR. At 473 K, N-2, and CO evolved very rapidly with a steep increase in the IR intensity of carboxylate (1574 and 1375 cm(-1)), while CO2 and carbonyl species increased more slowly.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 15/07/20 alle ore 08:40:58