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Shaping of HKUST-1 via Extrusion for the Separation of CO[sub.2]/CH[sub.4] in Biogas

Separations, 2023-09, Vol.10 (9) [Peer Reviewed Journal]

COPYRIGHT 2023 MDPI AG ;ISSN: 2297-8739 ;EISSN: 2297-8739 ;DOI: 10.3390/separations10090487

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  • Title:
    Shaping of HKUST-1 via Extrusion for the Separation of CO[sub.2]/CH[sub.4] in Biogas
  • Author: Rozaini, Muhamad Tahriri ; Grekov, Denys I ; Bustam, Mohamad Azmi ; Pré, Pascaline
  • Subjects: Biogas
  • Is Part Of: Separations, 2023-09, Vol.10 (9)
  • Description: HKUST-1 is a metal-organic framework (MOF) that is widely studied as an adsorbent for CO[sub.2] capture because of its high adsorption capacity and good CO[sub.2]/CH[sub.4] selectivity. However, the numerous synthesis routes for HKUST-1 often result in the obtention of MOF in powder form, which limits its application in industry. Here, we report the shaping of HKUST-1 powder via the extrusion method with the usage of bio-sourced polylactic acid (PLA) as a binder. The characterization of the composite was determined by XRD, FTIR, TGA and SEM analyses. The specific surface area was determined from the N[sub.2] adsorption isotherm, whereas the gas adsorption capacities were investigated via measurements of CO[sub.2] and CH[sub.4] isotherms of up to 10 bar at ambient temperature. The material characterization reveals that the composite preserves HKUST-1’s crystalline structure, morphology and textural properties. Furthermore, CO[sub.2] and CH[sub.4] adsorption isotherms show that there is no degradation of gravimetric gas adsorption capacity after shaping and the composite yields a similar isosteric adsorption heat as pristine HKUST-1 powder. However, some trade-offs could be observed, as the composite exhibits a lower bulk density than pristine HKUST-1 powder and PLA has no impact on pristine HKUST-1’s moisture stability. Overall, this study demonstrates the possibility of shaping commercial HKUST-1 powder, using PLA as a binder, into a larger solid-state-form adsorbent that is suitable for the separation of CO[sub.2] from CH[sub.4] with a well-preserved pristine MOF gas-adsorption performance.
  • Publisher: MDPI AG
  • Language: English
  • Identifier: ISSN: 2297-8739
    EISSN: 2297-8739
    DOI: 10.3390/separations10090487
  • Source: AUTh Library subscriptions: ProQuest Central
    ROAD: Directory of Open Access Scholarly Resources
    DOAJ Directory of Open Access Journals
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