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A novel seeding procedure for preparing tubular NaY zeolite membranes (Articolo in rivista)
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- A novel seeding procedure for preparing tubular NaY zeolite membranes (Articolo in rivista) (literal)
- Anno
- 2009-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1016/j.micromeso.2008.10.008 (literal)
- Alternative label
Algieri C.; Bernardo P.; Barbieri G.; Drioli E. (2009)
A novel seeding procedure for preparing tubular NaY zeolite membranes
in Microporous and mesoporous materials (Print); ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS, AMSTERDAM (Paesi Bassi)
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- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Algieri C.; Bernardo P.; Barbieri G.; Drioli E. (literal)
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- http://dx.doi.org/10.1016/j.micromeso.2008.10.008 (literal)
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- ISI Web of Science (WOS) (literal)
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- C. Algieri : National Research Council - Institute for Membrane Technology (ITM-CNR), Via Pietro BUCCI, c/o The University of Calabria, Cubo 17/C, 87030 Rende CS, Italy
P. Bernardo: National Research Council - Institute for Membrane Technology (ITM-CNR), Via Pietro BUCCI, c/o The University of Calabria, Cubo 17/C, 87030 Rende CS, Italy
Barbieri G. : National Research Council - Institute for Membrane Technology (ITM-CNR), Via Pietro BUCCI, c/o The University of Calabria, Cubo 17/C, 87030 Rende CS, Italy
E. Drioli: National Research Council - Institute for Membrane Technology (ITM-CNR), Via Pietro BUCCI, c/o The University of Calabria, Cubo 17/C, 87030 Rende CS, Italy--University of Calabria - Department of Chemical Engineering and Materials, Cubo 44/A, Via Pietro BUCCI, 87030 Rende CS, Italy (literal)
- Titolo
- A novel seeding procedure for preparing tubular NaY zeolite membranes (literal)
- Abstract
- A good seeding is a mandatory step to have defect-free zeolitic membranes prepared by means of a secondary
growth method. The transport properties of the zeolitic membranes depend strongly on the seeding
procedure of zeolite crystals during which the whole support surface has to be covered uniformly and
sufficiently. A new seeding procedure, involving cross-flow filtration of a water suspension combined
with rotation and tilting of the membrane support, was developed and utilized for the first time.
Porous a-alumina tubes were seeded using a water suspension of 0.2 wt.% in zeolite crystals, at a pH of
ca. 9.2 and room temperature. Cumulative stage-cut of the seeding phase was used as design parameter
in order to tailor the permeation properties (e.g., permeance) of the resulting NaY zeolite membranes. The
secondary growth was accomplished by a hydrothermal treatment.
SEM, EDX and XRD analyses show dense intergrown FAU layers with Si/Al ratios of 1.8-2.0 typical of
the NaY zeolite.
The measured permeance was 5-10% of that showed by the bare support. Another evidence of the
membrane quality can be found considering their application in CO selective oxidation reaction [P. Bernardo,
C. Algieri, G. Barbieri, E. Drioli, Catal. Today 118(1-2) (2006) 90]: a complete conversion of carbon
monoxide which falls down 1000 times from 10,000 to ca. 10 ppm indicates very few defects in the zeolite
layer (literal)
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