Mass transfer performance enhancement by nanoemulsion absorbents during CO2absorption process

Myunghwan Jeong, Jae Won Lee, Seung Joo Lee, Yong Tae Kang

    Research output: Contribution to journalArticlepeer-review

    31 Citations (Scopus)

    Abstract

    In this study, nanoemulsion absorbents (silicone oil/methanol) were manufactured by adding nano-size oil to absorbents for CO2absorption performance enhancement. To evaluate the dispersion stability of the nanoemulsion, oil droplet size measurement, turbidity measurement, and Tyndall effect visualization experiments were conducted. The effect of the ratio and concentration of oil and surfactants on the mass transfer enhancement was evaluated through thermal conductivity measurement using the transient hot wire method and the visualization analysis of CO2bubble absorption. The oil (silicone) and surfactant ratio of 2:1 was found to be the optimum condition through the results of dispersion stability analysis. In the CO2bubble absorption results obtained through the visualization analysis, the nanoemulsion with 0.01 vol% oil concentration showed the most significant absorption performance improvement. It was found that nano-size oil dispersion contributed to mass transfer enhancement, which was caused by the convective motion of nano-size oil droplets, not by enhanced thermal conductivity. Finally, the mechanisms of mass transfer enhancement by nanoemulsions are proposed, and it is concluded that the CO2absorption performance is enhanced by the shuttle effect and the hydrodynamic effect by the nanoemulsion absorbents.

    Original languageEnglish
    Pages (from-to)680-690
    Number of pages11
    JournalInternational Journal of Heat and Mass Transfer
    Volume108
    DOIs
    Publication statusPublished - 2017

    Bibliographical note

    Publisher Copyright:
    © 2016 Elsevier Ltd

    Keywords

    • COabsorption
    • Dispersion stability
    • Mass transfer enhancement
    • Nanoemulsion absorbents
    • Silicone oil
    • Surfactants

    ASJC Scopus subject areas

    • Condensed Matter Physics
    • Mechanical Engineering
    • Fluid Flow and Transfer Processes

    Fingerprint

    Dive into the research topics of 'Mass transfer performance enhancement by nanoemulsion absorbents during CO2absorption process'. Together they form a unique fingerprint.

    Cite this