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Ideal Adsorbed Solution Theory

Molecules (Basel, Switzerland), 2023-03, Vol.28 (7) [Peer Reviewed Journal]

COPYRIGHT 2023 MDPI AG ;ISSN: 1420-3049 ;EISSN: 1420-3049 ;DOI: 10.3390/molecules28073016

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  • Title:
    Ideal Adsorbed Solution Theory
  • Author: Ismail, Marhaina ; Bustam, Mohamad Azmi ; Kari, Nor Ernie Fatriyah ; Yeong, Yin Fong
  • Subjects: Adsorption ; Carbon dioxide ; Magnesium ; Methane ; Physical instruments
  • Is Part Of: Molecules (Basel, Switzerland), 2023-03, Vol.28 (7)
  • Description: Ideal Adsorbed Solution Theory (IAST) is a predictive model that does not require any mixture data. In gas purification and separation processes, IAST is used to predict multicomponent adsorption equilibrium and selectivity based solely on experimental single-component adsorption isotherms. In this work, the mixed gas adsorption isotherms were predicted using IAST calculations with the Python package (pyIAST). The experimental CO[sub.2] and CH[sub.4] single-component adsorption isotherms of Mg-gallate were first fitted to isotherm models in which the experimental data best fit the Langmuir model. The presence of CH[sub.4] in the gas mixture contributed to a lower predicted amount of adsorbed CO[sub.2] due to the competitive adsorption among the different components. Nevertheless, CO[sub.2] adsorption was more favorable and resulted in a higher predicted adsorbed amount than CH[sub.4]. Mg-gallate showed a stronger affinity for CO[sub.2] molecules and hence contributed to a higher CO[sub.2] adsorption capacity even with the coexistence of a CO[sub.2]/CH[sub.4] mixture. Very high IAST selectivity values for CO[sub.2]/CH[sub.4] were obtained which increased as the gas phase mole fraction of CO[sub.2] approached unity. Therefore, IAST calculations suggest that Mg-gallate can act as a potential adsorbent for the separation of CO[sub.2]/CH[sub.4] mixed gas.
  • Publisher: MDPI AG
  • Language: English
  • Identifier: ISSN: 1420-3049
    EISSN: 1420-3049
    DOI: 10.3390/molecules28073016
  • Source: GFMER Free Medical Journals
    PubMed Central
    Alma/SFX Local Collection
    ProQuest Central
    DOAJ Directory of Open Access Journals
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