Multi-scale mathematical model of mass transference phenomena inside monolithic carbon aerogels

D. Camargo-Trillos, F. Chejne, J. Alean

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    Abstract

    A phenomenological basis model was developed to describe behavior of gas adsorption at multi-length scales; from the macroscale (fixed bed scale) to mass transport, into the mesopores and micropores (microscale). The multiscale mass transport model is based on partial differential equations of adsorbate in the gas phase; where an additional adsorption flux on interface was implemented as a boundary condition (BC). Therefore, parallel contributions of kinetic adsorption and diffusive mass transference at BC were considered. The model allows a good fit between experimental and simulated results for fixed bed (FB) concentration profile, height of mass transport, and total adsorption capacity by carbon aerogels, with mesopores to micropores volume relation from 0.3 to 3.4. Both the experimental setup date and multi-scale model identify volume relation (Vmeso/Vmicro) as a key parameter on the design and optimization of adsorption technologies.

    Original languageEnglish
    Pages (from-to)3317-3325
    Number of pages9
    JournalHeat and Mass Transfer/Waerme- und Stoffuebertragung
    Volume55
    Issue number11
    DOIs
    StatePublished - 1 Nov 2019

    Bibliographical note

    Funding Information:
    Authors are thankful with the COLCIENCIAS (Ph.D. scholarship program number 528 and 617) for providing funding, for the successful completion of this study. Diego Camargo is grateful with CIDI-Universidad Pontifícia Bolivariana for supporting this work. Farid Chejne and Jader Alean wish to thank to the project “Strategy of transformation of the Colombian energy sector in the horizon 2030” funded by the call 788 of Colciencias Scientific Ecosystem. Contract number FP44842-210-2018.

    Publisher Copyright:
    © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.

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