Water vapor sorption kinetics of polymer based sorbents: Theory and experiments

Muhammad Sultan, Ibrahim I. El-Sharkawy, Takahiko Miyazaki, Bidyut B. Saha, Shigeru Koyama, Tomohiro Maruyama, Shinnosuke Maeda, Takashi Nakamura

    Research output: Contribution to journalArticlepeer-review

    34 Citations (Scopus)

    Abstract

    Water vapor sorption kinetics of two polymer based sorbents has been experimentally measured at adsorption temperatures of 20, 30, 50, 70 and 80 °C using a magnetic suspension adsorption measurement unit. The experimental data is employed to commonly known adsorption kinetics approximations i.e. Linear driving force (LDF) model, Fickian diffusion (FD) model, and Semi-infinite model. All these models could not approximate the adsorption kinetics of polymer based sorbents, however, the LDF model is modified which successfully predicts the experimental kinetics for short-time and long-time estimation. For both sorbents, the diffusion time constant has been calculated at each adsorption temperature, and consequently, activation energy and pre-exponential constant are found from Arrhenius plot. The variation of diffusion time constant with relative pressure and adsorption temperature is discussed in relation with typical behavior of polymer/water pairs.

    Original languageEnglish
    Pages (from-to)192-202
    Number of pages11
    JournalApplied Thermal Engineering
    Volume106
    DOIs
    Publication statusPublished - Aug 5 2016

    All Science Journal Classification (ASJC) codes

    • Energy Engineering and Power Technology
    • Industrial and Manufacturing Engineering

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