Preparation of graded silicalite-1 substrates for all-zeolite membranes with excellent CO2/H2 separation performanceShow others and affiliations
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.2015.06.020ISI: 000360554300021Scopus ID: 2-s2.0-84937053154Local ID: 5e4f9cc9-1c4c-4998-94e9-a3f2fb37570bOAI: oai:DiVA.org:ltu-7494DiVA, id: diva2:980384
Note
Validerad; 2015; Nivå 2; 20150612 (dankor)
2016-09-292016-09-292023-09-09Bibliographically approved