Coupling microwave-assisted and classical heating methods for scaling-up MFI zeolite membrane synthesis
Journal of Membrane Science, ISSN: 0376-7388, Vol: 401, Page: 144-151
2012
- 26Citations
- 37Captures
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Article Description
Silicalite-1 (S-1) nano-seeds obtained by microwave-assisted (MW) heating have been used to coat industrial supports and to up-scale the synthesis of MFI zeolite membranes by secondary growth applying a classical heating (CH) method. The MW-assisted method was adapted/optimized for fast synthesis and high yield of uniform and non-aggregated S-1 nano-seeds suspensions which were directly used for seeding macroporous industrial α-Al 2 O 3 - based supports by dip-coating. The CH secondary growth yielded uniform MFI membranes, by applying optimal reaction conditions while minimizing the reaction time and consumption of chemicals. The protocol coupling MW-assisted and classical heating in zeolite membrane synthesis revealed high reproducibility and has been validated on various industrial ceramic supports: single tubes ( Pall-Exekia, Atech, Inocermic, CTI ) and also single capillaries and capillary bundles, from Hyflux, providing a higher surface/volume ratio (typically S / V > 100 m 2 /m 3 ). Membrane homogeneity has been validated by both SEM and single gas permeation measurements with N 2 and SF 6. The N 2 /SF 6 ideal selectivity was used to predict the ethanol/water separation factor for the prepared MFI membranes.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S0376738812000749; http://dx.doi.org/10.1016/j.memsci.2012.01.045; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84858446379&origin=inward; https://linkinghub.elsevier.com/retrieve/pii/S0376738812000749; https://dx.doi.org/10.1016/j.memsci.2012.01.045
Elsevier BV
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