Mass transfer enhancement by gas injection to liquid-liquid slug flow in miniaturized channels

Nobuaki Aoki, Ryuichi Ando, Kazuhiro Mae

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    To increase the maximum flow rate that enables the formation of slug flow in miniaturized channels, gas phase slugs are injected in liquid-liquid slug flow to form gas-liquid-liquid slug flow. The effects of the channel size, the void fraction (the ratio of volumetric flow rate of gas phase to that of total flow rate), the volume ratio of aqueous phase to organic phase on the flow regime and the mass transfer rate are examined. The experimental results show that the region of total flow rate of the liquid phases that forms a stable gas-liquid-liquid slug flow increases as high as 200 mL/min with the air injection (void fraction more than 0.1) in a PTFE tube of i.d. 3 mm. If only liquid two phases are used, the maximum total flow rate to form a stable liquid-liquid slug flow is 60 mL/min. The mass transfer rate in gas-liquid-liquid slug flow is also high since the internal circulation flow is enhanced by the increased flow rate. The mass transfer rate is also correlated with the flow velocity. Through this study, we conclude that the gas-liquid-liquid slug flow is useful in rapid mass transfer operation with a high throughput.

    Original languageEnglish
    Title of host publication10AIChE - 2010 AIChE Annual Meeting, Conference Proceedings
    Publication statusPublished - 2010 Dec 1
    Event2010 AIChE Annual Meeting, 10AIChE - Salt Lake City, UT, United States
    Duration: 2010 Nov 72010 Nov 12

    Other

    Other2010 AIChE Annual Meeting, 10AIChE
    CountryUnited States
    CitySalt Lake City, UT
    Period10/11/710/11/12

    Keywords

    • Gas-liquid-liquid slug flow
    • Internal circulation flow
    • Mass transfer

    ASJC Scopus subject areas

    • Chemical Engineering(all)
    • Chemistry(all)

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