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Cryogenic air separation at low pressure using MFI membranes
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Chemical Engineering.
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: 0000-0002-4755-5754
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Chemical Engineering.
2015 (English)In: Journal of Membrane Science, ISSN 0376-7388, E-ISSN 1873-3123, Vol. 487, p. 135-140Article in journal (Refereed) Published
Abstract [en]

Ultra-thin MFI membranes were for the first time evaluated for air separation at low feed pressures ranging from 100 to 1000 mbar at cryogenic temperature. The membrane separation performance at optimum temperature at all investigated feed pressures was well above the Robeson upper bound for polymeric membranes at near room temperature. The O2/N2 separation factor at optimum temperature increased as the feed pressure was decreased and reached 5.0 at 100 mbar feed pressure and a membrane temperature of 67 K. The corresponding membrane selectivity was 6.3, and the O2 permeance was as high as 8.6×10−7 mol m−2 s−1 Pa−1. This permeance was about 100 times higher than that reported for promising polymeric membranes. The membrane selectivity and high O2 permeance was most likely a result of O2/N2 adsorption selectivity. The increase in O2/N2 separation factor with decreasing pressure and temperature was probably due to increased adsorption selectivity at reduced temperature. This work has demonstrated the potential of MFI zeolite membranes for O2/N2 separations at cryogenic temperature.

Place, publisher, year, edition, pages
2015. Vol. 487, p. 135-140
National Category
Chemical Process Engineering
Research subject
Chemical Technology
Identifiers
URN: urn:nbn:se:ltu:diva-10747DOI: 10.1016/j.memsci.2015.03.063ISI: 000354490700015Scopus ID: 2-s2.0-84928169403Local ID: 99a46e1f-6cce-41c3-84db-bcca182f12bcOAI: oai:DiVA.org:ltu-10747DiVA, id: diva2:983694
Note
Validerad; 2015; Nivå 2; 20150316 (dankor)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Ye, PengchengKorelskiy, DanilGrahn, MattiasHedlund, Jonas

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