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A simple method for blocking defects in zeolite membranes
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Chemical Engineering. Catalysis and Nanostructured Materials Research Laboratory, College of Engineering, School of Chemical Engineering, University of Tehran.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Chemical Engineering.ORCID iD: 0000-0003-2459-7932
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Chemical Engineering.ORCID iD: 0000-0003-2656-857X
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Chemical Engineering.ORCID iD: 0000-0003-4582-0902
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2015 (English)In: Journal of Membrane Science, ISSN 0376-7388, E-ISSN 1873-3123, Vol. 489, p. 270-274Article in journal (Refereed) Published
Abstract [en]

The abatement of defects in zeolite membranes is essential for achieving high selectivity. In the present work, a simple and effective method for blocking defects in ultra-thin (ca. 0.5 μm) MFI zeolite membranes has been developed. The method is based on deposition of an ultra-thin (∼15 nm) layer of amorphous silica on the top surface of the membrane. Permporometry data indicated that the amount of defects, especially defects larger than 4 nm, in the membranes was significantly reduced after the modification. In mixture separation experiments, the CO2/H2 separation factor increased dramatically after blocking the defects in a defective membrane that was selected for the experiments. For instance, at 263 K and 9 bar feed pressure, the CO2/H2 separation factor increased from 8.5 to 36 after modification of the membrane, whereas the CO2 flux only decreased by ca. 40%.

Place, publisher, year, edition, pages
2015. Vol. 489, p. 270-274
National Category
Chemical Process Engineering
Research subject
Chemical Technology
Identifiers
URN: urn:nbn:se:ltu:diva-7226DOI: 10.1016/j.memsci.2015.04.038ISI: 000355209300032Scopus ID: 2-s2.0-84938496874Local ID: 58f3c157-abda-4f09-9571-e3ea491e7be5OAI: oai:DiVA.org:ltu-7226DiVA, id: diva2:980115
Note
Validerad; 2015; Nivå 2; 20150413 (dankor)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Karimi, SomayehKorelskiy, DanilYu, LiangMouzon, JohanneHedlund, Jonas

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