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Titolo:
QUASI-ELASTIC NEUTRON-SCATTERING STUDY OF THE DYNAMICS OF METHANE ADSORBED IN NA-MORDENITE
Autore:
JOBIC H; BEE M;
Indirizzi:
INST RECH CATALYSE,CNRS,2 AVE ALBERT EINSTEIN F-69626 VILLEURBANNE FRANCE UNIV GRENOBLE 1,SPECTROMETRIE PHYS LAB F-38402 ST MARTIN DHERES FRANCE
Titolo Testata:
Zeitschrift für physikalische Chemie
, volume: 189, anno: 1995,
parte:, 2
pagine: 179 - 186
SICI:
0942-9352(1995)189:<179:QNSOTD>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
XE-129 NMR; ZEOLITES;
Keywords:
QENS STUDY OF CH4; ADSORPTION IN NA-MORDENITE; DIFFUSION IN STRAIGHT CHANNELS; TRAPPING IN SIDE POCKETS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
20
Recensione:
Indirizzi per estratti:
Citazione:
H. Jobic e M. Bee, "QUASI-ELASTIC NEUTRON-SCATTERING STUDY OF THE DYNAMICS OF METHANE ADSORBED IN NA-MORDENITE", Zeitschrift für physikalische Chemie, 189, 1995, pp. 179-186

Abstract

The dynamics of methane adsorbed at different loadings and temperatures in Na-mordenite have been studied by quasi-elastic neutron scattering. Two methane species have been characterized: molecules diffusing in the straight channels, and molecules trapped in the side pockets. For an average loading of 0.8 molecule per unit cell, the proportion of mobile molecules in the channels is approximate to 35%. There is an equilibrium between the two species depending on the loading and temperature. The self-diffusion coefficient is of the order of 10(-9) m(2) s(-1). This value is smaller than in the MFI or FAU structures because of the trapping in the side pockets.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/07/20 alle ore 10:16:56