Preparation and characterization of thin zeolite MFI membranes on porous supports

Vroon, Zeger; Keizer, Klaas; Burggraaf, A.J.; Verweij, H.

doi:10.1016/s0376-7388(98)00035-0

Cited by 131 publications

(95 citation statements)

References 17 publications

(22 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The majority of these methods calculate permselectivities between two gases with the same adsorption behavior but different kinetic diameters [15][16][17]46]. Vroon et al [16] used the n-butane/isobutane permselectivity at 473 K to test membrane defects. According to the authors, a defect-free membrane (high quality) is found when this permselectivity is higher than 10.…”

Section: Membrane Defect Characterization Through Gas Permeations Andmentioning

confidence: 99%

See 1 more Smart Citation

Experimental study and numerical simulation of hydrogen/isobutane permeation and separation using MFI-zeolite membrane reactor

et al. 2000

View full text Add to dashboard Cite

A composite alumina-MFI-zeolite membrane has been prepared by a pore-plugging method. Transport through this membrane is controlled by molecular size and adsorption properties, as expected for a defect-free zeolite composite layer.Single gas transport was studied for hydrogen and isobutane. In the studied temperature range, (323-723 K) for isobutane and (277-723 K) for hydrogen, transports were activated. Isobutane exhibited a flux maximum at 450 K, whereas hydrogen flux declined with temperature.These different permeation behaviors were modeled using Maxwell-Stefan equations taking into account only surface diffusion. Activation energies were obtained from the model by fitting the experimental data. They were calculated to be 31 kJ mol −1 for isobutane and 1.9 kJ mol −1 for hydrogen. The diffusion coefficients calculated at 323 K differed by four orders of magnitude.Separation experiments with a mixture of hydrogen and isobutane in a 293-723 K temperature range were performed. Typical permeation behavior was observed for a mixture of weakly and strongly adsorbed molecules. At room temperature, hydrogen permeation was hindered by stronger adsorbed isobutane molecules in the micropores. H 2 /i-C 4 H 10 separation experiments showed a separation factor of 25 at 723 K, a typical temperature of the isobutane dehydrogenation in membrane reactors. RésuméUne membrane composite alumine-zéolithe MFI est préparée par une méthode de bouchage de pores. Le transport à travers la membrane est contrôlé par la taille des molécules et leurs propriétés d'adsorption, comme on peut s'y attendre dans une couche composite zéolithique sans défaut.Le transport des gas purs est étudié pour l'hydrogène et l'isobutane. Dans les domaines de température étudiés, 323-723 K pour l'isobutane et 277-723 K pour l'hydogène, le transport de ces deux gaz est activé. Le flux d'isobutane présente un maximum à 450 K, alors que celui d'hydrogène diminue avec la température.Ces différents comportements en perméation sont modélisés en utilisant les équations de Maxwell-Stefan appliquées uniquement à la diffusion de surface. L'ajustement de l'équation du modèle aux données expérimentales permet d'obtenir les energies d'activation de diffusion. Celles-ci sont de 31 kJ mol −1 pour l'isobutane et de 1.9 kJ mol −1 pour l'hydrogène. Les coefficients de diffusion calculés à 323 K sont dans un rapport de 10 4 .Des expériences de séparation hydrogène/isobutane sont effectuées dans une gamme de température de 293 à 723 K. Il a été observé un comportement en perméation typique d'un mélange binaire de molécules gazeuses fortement et faiblement * Corresponding author. Fax: +33-4-7244-5399. E-mail address: dalmon@catalyse.univ-lyon.fr (J.-A. Dalmon).0920-5861/00/$ -see front matter ©2000 Elsevier Science B.V. All rights reserved. PII: S 0 9 2 0 -5 8 6 1 ( 9 9 ) 0 0 2 8 3 -7 254 P. Ciavarella et al. / Catalysis Today 56 (2000) [253][254][255][256][257][258][259][260][261][262][263][264] adsorbées. À température ambiante, la perméation d'hydrogène est gênée pa...

show abstract

Section: Membrane Defect Characterization Through Gas Permeations Andmentioning

confidence: 99%

“…In recent years, however, several groups have reported in the literature preparations of high quality zeolite membranes: MFI [11][12][13][14][15][16][17][18][19][20], mordenite [21], Y-type [22], A-type [23][24][25] and ferrierite [26].…”

Section: Introductionmentioning

confidence: 99%

Experimental study and numerical simulation of hydrogen/isobutane permeation and separation using MFI-zeolite membrane reactor

et al. 2000

View full text Add to dashboard Cite

show abstract

“…Substrates are typically immersed in the reaction mixture, and in some cases, the reaction container itself can act as a substrate. Various zeolites have been grown on the surfaces of organic polymers [4±7], porous alumina [8,9], glasses [10±12], and metals [5,13] using direct ®lm synthesis on substrates. The use of seeded substrates formed by depositing preformed crystals on substrates or laser ablation followed by further hydrothermal growth also allows for continuous ®lm formation [14,15].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of free-standing chabazite-type films

Lee

Dutta

2000

Microporous and Mesoporous Materials

View full text Add to dashboard Cite

“…For mixtures having components with similar adsorption properties the gas transport is determined by the mobility of molecules inside the zeolite pores. Exemplarily, the diffusion controlled permeation was demonstrated for n-butane/i-butane mixtures in MFI membranes [107][108][109]. In detail, both components show strong adsorption in the zeolite so that the permeation is mainly governed by the diffusion mobilities of the components.…”

Section: Permeation In Zeolite Membranesmentioning

confidence: 99%

Zeolite Catalysis

2016

View full text Add to dashboard Cite

Preparation and characterization of thin zeolite MFI membranes on porous supports

Cited by 131 publications

References 17 publications

Experimental study and numerical simulation of hydrogen/isobutane permeation and separation using MFI-zeolite membrane reactor

Experimental study and numerical simulation of hydrogen/isobutane permeation and separation using MFI-zeolite membrane reactor

Synthesis of free-standing chabazite-type films

Zeolite Catalysis

Contact Info

Product

Resources

About