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Influence of PVP buffer layer on the formation of NaA zeolite membrane

IR@CGCRI: CSIR-Central Glass and Ceramic Research Institute, Kolkata

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Title Influence of PVP buffer layer on the formation of NaA zeolite membrane
 
Creator Naskar, Milan Kanti
Kundu, Debtosh
Chatterjee, Minati
 
Subject Structural Clay Products
 
Description The support substrates were modified with the aqueous solutions of 1 and 3 wt% of polyvinyl pyrrolidine (PVP) as intermediate buffer layer followed by NaA zeolite seed (prepared hydrothermally at 85 A degrees C for 2 h) coating with 2.5 wt% aqueous dispersion in each case. A better surface coverage with the oriented layer of NaA seed crystals was found with 1 wt% PVP buffer layer. The secondary crystallization of NaA membranes in the PVP-seed-coated supports was carried out hydrothermally at 65 A degrees C for 2, 4, 6 h (single-stage each) and (2 + 2), (4 + 2)h (double-stage each) crystal growth processes. The crystallization behaviours of NaA membranes were studied by X-ray diffraction (XRD) while the microstructures of the same films were observed by scanning electron microscope (SEM). The single-stage secondary crystallization at 65 A degrees C for 4 h showed highly interlocked and oriented NaA grains in the membranes and it rendered the permeance value of 2.2 x 10(-8) mol m(-2)s(-1)Pa(-1) for single gas, nitrogen (N(2)) at ambient temperature (30 A degrees C).
 
Publisher Springer
 
Date 2011-06
 
Type Article
PeerReviewed
 
Format application/pdf
 
Identifier http://cgcri.csircentral.net/303/1/J_Porous_Mater_18_(2011)_319%E2%80%93327.pdf
Naskar, Milan Kanti and Kundu, Debtosh and Chatterjee, Minati (2011) Influence of PVP buffer layer on the formation of NaA zeolite membrane. Journal of Porous Materials, 18 (3). pp. 319-327. ISSN 1380-2224
 
Relation http://cgcri.csircentral.net/303/