Evaluation of a new supercritical CO2-assisted deposition method for preparing gas selective polymer/zeolite composite membranes

Drobek M., Motuzas J., Durand V., Duchateau M., Charmette C., Hertz A., Loubat C. and Julbe A. (2013) Evaluation of a new supercritical CO2-assisted deposition method for preparing gas selective polymer/zeolite composite membranes. Journal of Membrane Science, 429 428-435. doi:10.1016/j.memsci.2012.11.058


Author Drobek M.
Motuzas J.
Durand V.
Duchateau M.
Charmette C.
Hertz A.
Loubat C.
Julbe A.
Title Evaluation of a new supercritical CO2-assisted deposition method for preparing gas selective polymer/zeolite composite membranes
Journal name Journal of Membrane Science   Check publisher's open access policy
ISSN 0376-7388
1873-3123
Publication date 2013-02-01
Year available 2012
Sub-type Article (original research)
DOI 10.1016/j.memsci.2012.11.058
Volume 429
Start page 428
End page 435
Total pages 8
Place of publication Amsterdam Netherlands
Publisher Elsevier BV
Language eng
Formatted abstract
This work evaluates a new eco-friendly strategy for preparing ultrathin gas selective membranes on top of a microporous support. The method involves the dissolution of small amounts of fluorinated oligomers with alkoxysilane functional groups in supercritical CO2 (scCO2) and their transport to the substrate followed by the subsequent deposition/filtration under high pressure using a MFI zeolite membrane support (silicalite-1 (S-1), channel size ∼0.55 nm. During the deposition process, the oligomers are compressed on the zeolite surface and potentially forced in the intercrystalline defects of the zeolite membrane, if any. The performance of this new type of polymer/zeolite composite membranes has been evaluated for both single gas permeation and gas mixture separations. Attractive results were obtained applying oligomers with short molecular chains (∼1.2–2 nm; ∼300–600 g mol−1), easily forming an interpenetrated compact network during the deposition process at ΔP =6 MPa and 50 °C. High permselectivities were obtained at 25 °C (α*He/N2=85–135 and α*CO2/N2=50–80 with the He and CO2 permeance in the range 1–2.7⁎10−8 mol m−2 s−1 Pa−1) together with attractive separation factors (FHe/N2=49 and FCO2/N2=18).
Keyword Composite membranes
Deposition method
Fluorinated oligomers
Gas separation
Q-Index Code C1
Q-Index Status Confirmed Code
Grant ID 09.2.90.6408
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
Non HERDC
 
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