Show simple item record

dc.contributor.authorTopuz, Berna
dc.contributor.authorÇiftçioğlu, Muhsin
dc.date.accessioned2016-12-07T09:09:29Z
dc.date.available2016-12-07T09:09:29Z
dc.date.issued2010-12
dc.identifier.citationTopuz, B., and Çiftçioğlu, M. (2010). Sol-gel derived mesoporous and microporous alumina membranes. Journal of Sol-Gel Science and Technology, 56(3), 287-299. doi:10.1007/s10971-010-2305-7en_US
dc.identifier.issn0928-0707
dc.identifier.urihttp://doi.org/10.1007/s10971-010-2305-7
dc.identifier.urihttp://hdl.handle.net/11147/2586
dc.description.abstractStable polymeric and colloidal boehmite sols were prepared by sol-gel process through controlled hydrolysis/condensation reactions. The particle sizes of the colloidal sols were in the 12-25 nm range depending on the process parameters and about 2 nm for polymeric sols. The presence of a significant increase in the microporosity content of the heat treated polymeric membranes relative to the mesoporous colloidal membranes might make the design of thermally stable microporous alumina membranes with controlled pore structures possible. The phase structure evolution in the 600-800 °C range had shown that the crystallization of the gamma alumina in the amorphous matrix starts at about 800 °C. This indicated that the pore structure stability may be enhanced through processing up to this relatively high temperature in polymeric alumina derived unsupported membranes. The permeance values of the two and three layered colloidal alumina membranes were observed to be independent of pressure which implies that the dominant gas transport mechanism is Knudsen diffusion in these structures. This was also supported by the 2.8 nm BJH pore sizes of the colloidal membranes. The Knudsen diffusion equation derived permeances of the polymeric alumina membranes with thicknesses of about 300 nm were determined to be very close to the experimentally determined permeance values. © 2010 Springer Science+Business Media, LLC.en_US
dc.language.isoengen_US
dc.publisherSpringeren_US
dc.relation.isversionof10.1007/s10971-010-2305-7en_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectGas permeable membranesen_US
dc.subjectAlumina membranesen_US
dc.subjectThermal stabilityen_US
dc.subjectSol-Gelen_US
dc.subjectGas permeationen_US
dc.titleSol-gel derived mesoporous and microporous alumina membranesen_US
dc.typearticleen_US
dc.contributor.authorIDTR199469en_US
dc.contributor.authorIDTR11652en_US
dc.contributor.institutionauthorTopuz, Berna
dc.contributor.institutionauthorÇiftçioğlu, Muhsin
dc.relation.journalJournal of Sol-Gel Science and Technologyen_US
dc.contributor.departmentİYTE, Mühendislik Fakültesi, Kimya Mühendisliği Bölümüen_US
dc.identifier.volume56en_US
dc.identifier.issue3en_US
dc.identifier.startpage287en_US
dc.identifier.endpage299en_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record