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Highly Structured Nanofiber Zeolite Materials for Biogas Upgrading
Department of Environmental Engineering, Technical University of Denmark, Lyngby, Denmark.
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Materialvetenskap.
Department of Energy Conversion and Storage, Technical University of Denmark, Roskilde, Denmark.
Department of Energy Conversion and Storage, Technical University of Denmark, Roskilde, Denmark.
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2020 (Engelska)Ingår i: Energy Technology, E-ISSN 2194-4296, Vol. 8, nr 1, artikel-id 1900781Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Hierarchical zeolite composite nanofibers are designed using an electrospinning technique with post‐carbonization processing to form mechanically strong pellets for biogas upgrading. A ZSM‐5 nanopowder (zeolite) and a polyvinylpyrrolidone (PVP) polymer are electrospun to form ZSM/PVP composite nanofibers, which are transformed into a ZSM and carbon composite nanofiber (ZSM/C) by a two‐step heat treatment. The ZSM/C nanofibers show a 30.4% increase in Brunauer–Emmett–Teller (BET) surface area compared with the non‐structured ZSM‐5 nanopowder. Using ideal adsorbed solution theory, CO2‐over‐CH4 selectivity of 20 and CO2 uptake of 2.15 mmolg−1 at 293 K at 1 bar for ZSM/C nanofibers are obtained. For the efficient use of adsorbents in pressure swing adsorption operation, the nanofibers are structured into ZSM/C pellets that offer a maximum tensile strength of 6.46 MPa to withstand pressure swings. In the breakthrough tests, the CO2 uptake of the pellets reach 3.18 mmolg−1 at 293 K at 4 bar after 5 breakthrough adsorption–desorption cycles, with a much higher mass transfer coefficient of 1.24 ms−1 and CO2 uptake rate of 2.4 mg of CO2 g−1s−1, as compared with other structured zeolite adsorbents.

Ort, förlag, år, upplaga, sidor
John Wiley & Sons, 2020. Vol. 8, nr 1, artikel-id 1900781
Nyckelord [en]
adsorbent materials, biogas upgrading, electrospinning, zeolites
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Materialteknik
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URN: urn:nbn:se:ltu:diva-76434DOI: 10.1002/ente.201900781ISI: 000488168800001OAI: oai:DiVA.org:ltu-76434DiVA, id: diva2:1362283
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Validerad;2020;Nivå 2;2020-01-28 (johcin)

Tillgänglig från: 2019-10-18 Skapad: 2019-10-18 Senast uppdaterad: 2020-01-28Bibliografiskt granskad

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Narang, KritikaAkhtar, Farid

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