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Activated carbon fibers for efficient VOC removal from diluted streams: the role of surface morphology

Baur, Guillaume ; Yuranov, Igor ; Renken, Albert ; Kiwi-Minsker, Lioubov

In: Adsorption, 2015, vol. 21, no. 6-7, p. 479-488

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    Titel
    • Activated carbon fibers for efficient VOC removal from diluted streams: the role of surface morphology
    Autor
    • Baur, Guillaume. Group of Catalytic Reaction Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-GGRC, Station 6, 1015, Lausanne, Switzerland
    • Yuranov, Igor. Group of Catalytic Reaction Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-GGRC, Station 6, 1015, Lausanne, Switzerland
    • Renken, Albert. Group of Catalytic Reaction Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-GGRC, Station 6, 1015, Lausanne, Switzerland
    • Kiwi-Minsker, Lioubov. Group of Catalytic Reaction Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-GGRC, Station 6, 1015, Lausanne, Switzerland
    Dokumententyp
    • Postprint
    Sprache
    • Englisch
    Veröffentlicht in
    • Adsorption, 2015, vol. 21, no. 6-7, p. 479-488. Springer US; http://www.springer-ny.com
    Andere elektronische Ausgabe
    OAI-PMH-ID
    • oai:doc.rero.ch:332999
    Summary
    The effect of the micropore structure of activated carbon fibers (ACFs) on the adsorption of toluene at low concentration (10-80ppmv) was studied over two types of ACFs. Both adsorbents presented similar surface chemistry but different porous structure: one ACF was ultramicroporous (d pore <1nm) and the other supermicroporous (d pore ~1 to 2nm). Toluene adsorption isotherms were determined for both ACFs and were found to be consistent with Dubinin-Radushkevich (D-R) model. The toluene adsorption enthalpies calculated from temperature-programmed desorption profiles at temperatures below 330K were close to the values obtained from D-R equations. Larger adsorption strength was found in the ultramicroporous adsorbent as compared to the supermicroporous one suggesting that the pore shape strongly influences the adsorption mechanism. The adsorbent with a lower specific surface area but narrower micropores could be more efficient at high temperatures than an adsorbent with large pore volume and wider micropores. The findings reported have a big importance for correct choice of material when designing efficient structured adsorbing bed.