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Highly permeable DDR membranes
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.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Chemical Engineering.ORCID iD: 0000-0002-7477-4960
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Chemical Engineering.ORCID iD: 0000-0003-1053-4623
2023 (English)In: Journal of Membrane Science, ISSN 0376-7388, E-ISSN 1873-3123, Vol. 687, article id 122039Article in journal (Refereed) Published
Abstract [en]

In this study, DDR membranes with a layer thickness of approximately 700 nm were studied for separation feeds comprising mixtures of CO2 and CH4. The membranes displayed the highest CO2 over CH4 permselectivity and CO2 permeability reported in literature. This was ascribed to a defect-free and ultra-thin zeolite film as well as an open and highly permeable support. For equimolar mixtures, the highest CO2 over CH4 permselectivity of 727 was observed when the pressure at the feed side was 5 bar(a) and the permeate pressure was 1 bar(a) at 25 °C. At these conditions, the CO2 permeability was very high at 45 × 10−7 mol/(m2 s Pa). Separation experiments for 80/20 and 20/80 mixtures were also performed, and in these cases, CO2 over CH4 permselectivities of 1011 and 622 were observed, respectively. For all feeds, the membrane permselectivity decreased slightly at higher temperature and in all cases, higher permselectivity was observed when vacuum was applied at the permeate side. One-stage membrane processes for upgrading biogas to biomethane at three different operating pressures were designed based on the experimental data. In all cases, a quite low membrane area, methane slip and power need were observed.

Place, publisher, year, edition, pages
Elsevier B.V. , 2023. Vol. 687, article id 122039
Keywords [en]
Biogas, Biomethane, CO2 separation, DDR zeolite membrane, High permeability
National Category
Chemical Process Engineering
Research subject
Chemical Technology
Identifiers
URN: urn:nbn:se:ltu:diva-101337DOI: 10.1016/j.memsci.2023.122039ISI: 001087566300001Scopus ID: 2-s2.0-85169829212OAI: oai:DiVA.org:ltu-101337DiVA, id: diva2:1796692
Funder
Swedish Research Council FormasSwedish Research CouncilBio4Energy
Note

Validerad;2023;Nivå 2;2023-09-13 (joosat);

CC BY-NC-ND 4.0 License

Available from: 2023-09-13 Created: 2023-09-13 Last updated: 2024-03-07Bibliographically approved

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Yu, LiangKyriazidou, IlianaZhou, MingHedlund, Jonas

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