Influence of sol-gel process parameters on the micro-structure and performance of hybrid silica membranes

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Abstract

A facile, versatile and reproducible sol–gel process to make microporous organosilica membranes by using 1,2-bis (triethoxysilyl) ethane (BTESE) as a precursor is reported. The influence of process parameters on sol particle size and rheology of BETSE-derived sols was investigated to produce defect-free composite membranes by a single dipping procedure and subsequent calcination. The microporous structure of a BTESE layer on mesoporous alumina supports enabled selective molecular sieving of gas molecules. Single gas permeation (SGP) experiments, performed at 200 C, showed that a H2/CH4 permselectivity of 24 was reproducibly achieved. NoSF6 gas permeance through these membranes proof the presence of a defect-free microstructure. SEM cross-section analysis showed a hybrid selective layer with a thickness dependent on the sol precursor concentration.
Original languageEnglish
Pages (from-to)19-25
JournalJournal of membrane science
Volume446
DOIs
Publication statusPublished - 2013

Fingerprint

Polymethyl Methacrylate
sol-gel processes
Sols
Silicon Dioxide
Sol-gel process
Gases
Gels
Silica
Ethane
silicon dioxide
membranes
Membranes
ethane
microstructure
Microstructure
gases
Defects
Rheology
Aluminum Oxide
Composite membranes

Keywords

  • METIS-296810
  • IR-87830

Cite this

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abstract = "A facile, versatile and reproducible sol–gel process to make microporous organosilica membranes by using 1,2-bis (triethoxysilyl) ethane (BTESE) as a precursor is reported. The influence of process parameters on sol particle size and rheology of BETSE-derived sols was investigated to produce defect-free composite membranes by a single dipping procedure and subsequent calcination. The microporous structure of a BTESE layer on mesoporous alumina supports enabled selective molecular sieving of gas molecules. Single gas permeation (SGP) experiments, performed at 200 C, showed that a H2/CH4 permselectivity of 24 was reproducibly achieved. NoSF6 gas permeance through these membranes proof the presence of a defect-free microstructure. SEM cross-section analysis showed a hybrid selective layer with a thickness dependent on the sol precursor concentration.",
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author = "H.F. Qureshi and Arian Nijmeijer and Winnubst, {Aloysius J.A.}",
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Influence of sol-gel process parameters on the micro-structure and performance of hybrid silica membranes. / Qureshi, H.F.; Nijmeijer, Arian; Winnubst, Aloysius J.A.

In: Journal of membrane science, Vol. 446, 2013, p. 19-25.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Influence of sol-gel process parameters on the micro-structure and performance of hybrid silica membranes

AU - Qureshi, H.F.

AU - Nijmeijer, Arian

AU - Winnubst, Aloysius J.A.

PY - 2013

Y1 - 2013

N2 - A facile, versatile and reproducible sol–gel process to make microporous organosilica membranes by using 1,2-bis (triethoxysilyl) ethane (BTESE) as a precursor is reported. The influence of process parameters on sol particle size and rheology of BETSE-derived sols was investigated to produce defect-free composite membranes by a single dipping procedure and subsequent calcination. The microporous structure of a BTESE layer on mesoporous alumina supports enabled selective molecular sieving of gas molecules. Single gas permeation (SGP) experiments, performed at 200 C, showed that a H2/CH4 permselectivity of 24 was reproducibly achieved. NoSF6 gas permeance through these membranes proof the presence of a defect-free microstructure. SEM cross-section analysis showed a hybrid selective layer with a thickness dependent on the sol precursor concentration.

AB - A facile, versatile and reproducible sol–gel process to make microporous organosilica membranes by using 1,2-bis (triethoxysilyl) ethane (BTESE) as a precursor is reported. The influence of process parameters on sol particle size and rheology of BETSE-derived sols was investigated to produce defect-free composite membranes by a single dipping procedure and subsequent calcination. The microporous structure of a BTESE layer on mesoporous alumina supports enabled selective molecular sieving of gas molecules. Single gas permeation (SGP) experiments, performed at 200 C, showed that a H2/CH4 permselectivity of 24 was reproducibly achieved. NoSF6 gas permeance through these membranes proof the presence of a defect-free microstructure. SEM cross-section analysis showed a hybrid selective layer with a thickness dependent on the sol precursor concentration.

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KW - IR-87830

U2 - 10.1016/j.memsci.2013.06.024

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M3 - Article

VL - 446

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JF - Journal of membrane science

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