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Titolo:
Effect of sulfur dioxide on nitric oxide adsorption and decomposition on Cu-containing micro- and mesoporous molecular sieves
Autore:
Ziolek, M; Sobczak, I; Nowak, I; Daturi, M; Lavalley, JC;
Indirizzi:
Adam Mickiewicz Univ, Fac Chem, PL-60780 Poznan, Poland Adam Mickiewicz Univ Poznan Poland PL-60780 hem, PL-60780 Poznan, Poland Univ Caen, ISMRA, UMR 6506, Catalyse & Spectrochim Lab, F-14050 Caen, France Univ Caen Caen France F-14050 se & Spectrochim Lab, F-14050 Caen, France
Titolo Testata:
TOPICS IN CATALYSIS
fascicolo: 1-4, volume: 11, anno: 2000,
pagine: 343 - 350
SICI:
1022-5528(2000)11:1-4<343:EOSDON>2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Soggetto:
SELECTIVE CATALYTIC REDUCTION; EXCHANGED ZSM-5 ZEOLITES; CU/AL2O3 CATALYSTS; NITROGEN MONOXIDE; CONTAINING MCM-41; CO ADSORPTION; NO REDUCTION; METAL-OXIDES; SO2; MORDENITE;
Keywords:
Cu-ZSM-5; Cu-AlMCM-41; Cu-NbMCM-41; SO2 poisoning; NO adsorption and decomposition; FTIR; H-2-TPR;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
39
Recensione:
Indirizzi per estratti:
Indirizzo: Ziolek, M Adam Mickiewicz Univ, Fac Chem, Grunwaldzka 6, PL-60780 Poznan, Poland Adam Mickiewicz Univ Grunwaldzka 6 Poznan Poland PL-60780 oland
Citazione:
M. Ziolek et al., "Effect of sulfur dioxide on nitric oxide adsorption and decomposition on Cu-containing micro- and mesoporous molecular sieves", TOP CATAL, 11(1-4), 2000, pp. 343-350

Abstract

NO decomposition was studied at different temperatures on copper-exchangedZSM-5, AlMCM-41 and NbMCM-41 molecular sieves. Cu-ZSM-5 zeolites presentedthe highest activity. SO2 poisoning was also performed and Cu-NbMCM-41 wasfound to be more resistant. IR results of NO and SO2 coadsorption either at room temperature or at 573 K show evidence that sulfate formation occurred at 573 K and partially prevented NO adsorption on Cu2+ in square planar structure in Cu-ZSM-5. Sulfation of Cu-NbMCM-41 was quite low due to niobiumincorporated into the lattice. By contrast, niobium present in the extra-lattice position in CuNb-ZSM-5 and CuNb-AlMCM-41 did not protect the catalyst from sulfation. H-2-TPR results suggested that sulfates were formed on copper sites. IR spectra after treatment under SO2 +O-2 at 673 K indicated that sulfated species were covalently bonded, their structure varying according to the nature of the support.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 21/09/20 alle ore 19:19:36