Influence of the Si/Al ratio on the separation properties of SSZ-13 zeolite membranes

N. Kosinov; C. Auffret; G.J. Borghuis; V.G.P. Sripathi; E.J.M. Hensen

doi:10.1016/j.memsci.2015.02.044

Influence of the Si/Al ratio on the separation properties of SSZ-13 zeolite membranes

N. Kosinov
, C. Auffret
, G.J. Borghuis
, V.G.P. Sripathi
, E.J.M. Hensen

Inorganic Materials & Catalysis

Research output: Contribution to journal › Article › Academic › peer-review

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Abstract

SSZ-13 (CHA) zeolite membranes supported by a-alumina hollow fibers were prepared by a hydrothermal secondary growth method. The gel Si/Al ratio was varied between 5 and 100. The water adsorption depended strongly on the Si/Al ratio. Comparatively, ethanol adsorption varied less with membrane hydrophobicity. Consistent with these trends, low-silica membranes showed good performance in the pervaporative dehydration of ethanol/water mixtures. On contrary, high-silica membranes were found to be more effective for CO2/CH4 equimolar gas mixture separation. Together with increasing framework polarity, the concentration of non-zeolitic pathways (intercrystalline defects) increased with the Al content. The net effect of the influence of membrane polarity and defect density makes low-silica SSZ-13 water-selective membranes for alcohol/water pervaporation and high-silica SSZ-13 promising CO2-selective membranes in gas separation (CO2/CH4).

Original language	English
Pages (from-to)	140-145
Journal	Journal of Membrane Science
Volume	484
DOIs	https://doi.org/10.1016/j.memsci.2015.02.044
Publication status	Published - 9 Mar 2015

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title = "Influence of the Si/Al ratio on the separation properties of SSZ-13 zeolite membranes",

abstract = "SSZ-13 (CHA) zeolite membranes supported by a-alumina hollow fibers were prepared by a hydrothermal secondary growth method. The gel Si/Al ratio was varied between 5 and 100. The water adsorption depended strongly on the Si/Al ratio. Comparatively, ethanol adsorption varied less with membrane hydrophobicity. Consistent with these trends, low-silica membranes showed good performance in the pervaporative dehydration of ethanol/water mixtures. On contrary, high-silica membranes were found to be more effective for CO2/CH4 equimolar gas mixture separation. Together with increasing framework polarity, the concentration of non-zeolitic pathways (intercrystalline defects) increased with the Al content. The net effect of the influence of membrane polarity and defect density makes low-silica SSZ-13 water-selective membranes for alcohol/water pervaporation and high-silica SSZ-13 promising CO2-selective membranes in gas separation (CO2/CH4).",

author = "N. Kosinov and C. Auffret and G.J. Borghuis and V.G.P. Sripathi and E.J.M. Hensen",

year = "2015",

month = mar,

day = "9",

doi = "10.1016/j.memsci.2015.02.044",

language = "English",

volume = "484",

pages = "140--145",

journal = "Journal of Membrane Science",

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TY - JOUR

T1 - Influence of the Si/Al ratio on the separation properties of SSZ-13 zeolite membranes

AU - Kosinov, N.

AU - Auffret, C.

AU - Borghuis, G.J.

AU - Sripathi, V.G.P.

AU - Hensen, E.J.M.

PY - 2015/3/9

Y1 - 2015/3/9

N2 - SSZ-13 (CHA) zeolite membranes supported by a-alumina hollow fibers were prepared by a hydrothermal secondary growth method. The gel Si/Al ratio was varied between 5 and 100. The water adsorption depended strongly on the Si/Al ratio. Comparatively, ethanol adsorption varied less with membrane hydrophobicity. Consistent with these trends, low-silica membranes showed good performance in the pervaporative dehydration of ethanol/water mixtures. On contrary, high-silica membranes were found to be more effective for CO2/CH4 equimolar gas mixture separation. Together with increasing framework polarity, the concentration of non-zeolitic pathways (intercrystalline defects) increased with the Al content. The net effect of the influence of membrane polarity and defect density makes low-silica SSZ-13 water-selective membranes for alcohol/water pervaporation and high-silica SSZ-13 promising CO2-selective membranes in gas separation (CO2/CH4).

AB - SSZ-13 (CHA) zeolite membranes supported by a-alumina hollow fibers were prepared by a hydrothermal secondary growth method. The gel Si/Al ratio was varied between 5 and 100. The water adsorption depended strongly on the Si/Al ratio. Comparatively, ethanol adsorption varied less with membrane hydrophobicity. Consistent with these trends, low-silica membranes showed good performance in the pervaporative dehydration of ethanol/water mixtures. On contrary, high-silica membranes were found to be more effective for CO2/CH4 equimolar gas mixture separation. Together with increasing framework polarity, the concentration of non-zeolitic pathways (intercrystalline defects) increased with the Al content. The net effect of the influence of membrane polarity and defect density makes low-silica SSZ-13 water-selective membranes for alcohol/water pervaporation and high-silica SSZ-13 promising CO2-selective membranes in gas separation (CO2/CH4).

U2 - 10.1016/j.memsci.2015.02.044

DO - 10.1016/j.memsci.2015.02.044

M3 - Article

SN - 0376-7388

VL - 484

SP - 140

EP - 145

JO - Journal of Membrane Science

JF - Journal of Membrane Science

ER -

Influence of the Si/Al ratio on the separation properties of SSZ-13 zeolite membranes

Abstract

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