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Preparation of graded silicalite-1 substrates for all-zeolite membranes with excellent CO2/H2 separation performance
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.ORCID iD: 0000-0003-4888-6237
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Chemical Engineering.ORCID iD: 0000-0003-2459-7932
Department of Chemistry, The University of Surrey, Guildford.
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2015 (English)In: Journal of Membrane Science, ISSN 0376-7388, E-ISSN 1873-3123, Vol. 493, p. 206-211Article in journal (Refereed) Published
Abstract [en]

raded silicalite-1 substrates with a high gas permeability and low surface roughness have been produced by pulsed current processing of a thin coating of a submicron silicalite-1 powder onto a powder body of coarser silicalite-1 crystals. Thin zeolite films have been hydrothermally grown onto the graded silicalite-1 support and the all-zeolite membranes display an excellent CO2/H2 separation factor of 12 at 0 °C and a CO2 permeance of 21.3×10-7 mol m-2 s-1 Pa-1 for an equimolar CO2/H2 feed at 505 kPa and 101 kPa helium sweep gas. Thermal cracking estimates based on calculated surface energies and measured thermal expansion coefficients suggest that all-zeolite membranes with a minimal thermal expansion mismatch between the graded substrate and the zeolite film should remain crack-free during thermal cycling and the critical calcination step.

Place, publisher, year, edition, pages
2015. Vol. 493, p. 206-211
National Category
Other Materials Engineering Chemical Process Engineering
Research subject
Engineering Materials; Chemical Technology
Identifiers
URN: urn:nbn:se:ltu:diva-7494DOI: 10.1016/j.memsci.2015.06.020Local ID: 5e4f9cc9-1c4c-4998-94e9-a3f2fb37570bOAI: oai:DiVA.org:ltu-7494DiVA, id: diva2:980384
Note
Validerad; 2015; Nivå 2; 20150612 (dankor)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved

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Akhtar, FaridSjöberg, ErikKorelskiy, DanilHedlund, Jonas
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