Modeling the extra-column volume in a small column setup for bulk gas adsorption

Lisa Joss, Marco Mazzotti

    Research output: Contribution to journalArticlepeer-review


    This study aims at highlighting the importance of an accurate characterization of the extra-column volume (ECV) and presents an experimental and computational protocol based on the characterization of the extra-column volume in terms of step-response experiments performed under various flow rates and pressures of 1 bar, 5 bar and 10 bar. The experiments are interpreted by describing the extra-column volume with a compartment model that reflects the geometry of the physical setup and that involves a stagnant zone to account for the non-ideal flow behavior through the piping system. The use of a mathematical model combining the description of the adsorption column and of the ECV can successfully predict experimental CO2–H2 breakthrough profiles performed at different pressures on an activated carbon adsorbent. This work shows how the presence of non-negligible extra-column effects can be accounted for, for the determination of adsorption transport parameters.
    Original languageEnglish
    Pages (from-to)381-393
    Issue number5-6
    Publication statusPublished - 1 Dec 2012


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