Development and characterization of silica-based membranes for hydrogen separation (Journal article)

Nitodas, S.F.Favvas, E.P.Romanos, G.E.Papadopoulos, M.A.Mitropoulos, A.C.Kanellopoulos, N.K.

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dc.contributor.authorNitodas, S.F.en
dc.contributor.authorFavvas, E.P.en
dc.contributor.authorRomanos, G.E.en
dc.contributor.authorPapadopoulos, M.A.en
dc.contributor.authorMitropoulos, A.C.en
dc.contributor.authorKanellopoulos, N.K.en
dc.rightsDefault License-
dc.subjectChemical vapor epositionen
dc.subjectMembrane permeanceen
dc.titleDevelopment and characterization of silica-based membranes for hydrogen separationen
heal.generalDescriptionVolume 15 , Issue 5, pp. 551-557en
heal.generalDescriptionDepartment of Petroleum and Natural Gas Technology, Cavala Institute of Technology, P.O. Box 1194, Ag. Loukas, Cavala 6540, Greeceen
heal.generalDescriptionInstitute of Physical Chemistry, NCSR Demokritos, P.O. Box 60228, Ag. Paraskevi, Attikis 15310, Greeceen
heal.classificationChemical vapor depositionen
heal.recordProviderΔεν υπάρχει πληροφορίαel
heal.bibliographicCitationΔεν υπάρχει πληροφορίαel
heal.abstractThe method of chemical vapor deposition (CVD) in the counter current configuration was employed in the present study for the development of composite silica membranes. The experiments were carried out in a horizontal CVD reactor under controlled temperature conditions and at various reaction times and differential pressures across the substrate sides. Tetraethylorthosilicate (TEOS) and ozone were used as deposition precursors. Two types of substrates were employed: a porous Vycor tube and an alumina (γ-Al2O 3) nanofiltration (NF) tube. Measurements with a novel mercury intrusion technique showed that significant reduction of the initial pore size of the γ-Al2O3 substrates was achieved, which reached 76% in the cases of extended silica deposition. Additionally, by appropriately interpreting the Knudsen type O2 permeance results, acquired during the CVD treatment of Vycor tubes, a pore radius reduction even down to the 30% of the initial value was concluded. The permeance of Η2 and other gases (Ηe, Ν2, Αr, CO 2) on the developed membranes was measured in a home-made apparatus. The separation capability of the composite membranes was determined by calculating the selectivity of hydrogen over helium, nitrogen, argon and carbon dioxide. © 2007 Springer Science+Business Media, LLC.en
heal.publisherΔεν υπάρχει πληροφορίαel
heal.journalNameJournal of Porous Materialsen
heal.type.enJournal articleen
heal.type.elΆρθρο περιοδικούel
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