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Titolo:
Characterization of zeolite membranes by temperature programmed permeationand step desorption
Autore:
Bernal, MP; Coronas, J; Menendez, M; Santamaria, J;
Indirizzi:
Univ Zaragoza, Fac Sci, Dept Environm Chem & Engn, E-50009 Zaragoza, SpainUniv Zaragoza Zaragoza Spain E-50009 hem & Engn, E-50009 Zaragoza, Spain
Titolo Testata:
JOURNAL OF MEMBRANE SCIENCE
fascicolo: 1, volume: 195, anno: 2002,
pagine: 125 - 138
SICI:
0376-7388(20020101)195:1<125:COZMBT>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
MFI MEMBRANES; SILICALITE-1 MEMBRANE; COMPOSITE MEMBRANES; TUBULAR MEMBRANES; SEPARATION; MIXTURES; REACTOR;
Keywords:
zeolite membrane; silicalite; ZSM5; temperature programmed permeation; transient desorption;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
31
Recensione:
Indirizzi per estratti:
Indirizzo: Santamaria, J Univ Zaragoza, Fac Sci, Dept Environm Chem & Engn, E-50009 Zaragoza, Spain Univ Zaragoza Zaragoza Spain E-50009 50009 Zaragoza, Spain
Citazione:
M.P. Bernal et al., "Characterization of zeolite membranes by temperature programmed permeationand step desorption", J MEMBR SCI, 195(1), 2002, pp. 125-138

Abstract

A temperature programmed permeation (TPP) system was employed to measure the single gas permeances of H-2, N-2, CO2, methane, ethane, propane and n-butane through MFI membranes prepared on tubular alumina and stainless steelsupports. The same system was used to measure the CO2/N-2 Separation selectivity using mixed feeds. The results obtained by TPP were in good agreement with permeation data gathered by on-line gas chromatography at fixed temperatures. However, the amount of information that could be obtained from TPP experiments in a comparable experimental time was much larger. Step desorption (SID) experiments were also carried out in which the response of the membrane to a step change in the feed side concentration was continuously analyzed. The permeation-temperature and permeation-time data gathered in the TPP and SD experiments with model compounds and mixtures provided valuable information on the permeation regimes, the adsorption processes taking place and the overall quality of the membranes. (C) 2002 Elsevier Science B.V. All rights reserved.

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Documento generato il 22/09/20 alle ore 22:48:01