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Effect of Surfactant on Homogeneous Regime Stability in Bubble Column.

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985858%3A_____%2F08%3A00099419" target="_blank" >RIV/67985858:_____/08:00099419 - isvavai.cz</a>

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    Effect of Surfactant on Homogeneous Regime Stability in Bubble Column.

  • Original language description

    Experiments were carried out to investigate the effect a surface active agent on homogeneous?heterogeneous flow regime transition in a laboratory scale bubble column. The (voidage e) - (gas flow rate q) dependence was measured. The critical point where the homogeneous regime loses stability and the transition begins was evaluated by several methods. These methods are based on the slip speed concept and the drift flux model. The critical values of voidage and gas flow rate were taken as the quantitativemeasures of the homogeneous regime stability. They were plotted against the surfactant concentration. It was found that the surfactant has a dual effect on both the voidage and the regime transition: low concentration stabilizes and larger concentrationdestabilizes the homogeneous bubble bed. At present, we do not have an explanation to these observations. Possible physical mechanisms of the surfactant effect are expected to be revealed by further experiments.

  • Czech name

    Vliv povrchově aktivních látek na stabilitu homogenního režimu v probublávaných kolonách.

  • Czech description

    Byly provedeny experimenty v probublávaných kolonách laboratorního měřítka za účelem studia vlivu povrchově aktivních látek na stabilitu homogenního režimu probublávané vrstvy. Roztoky CaCl2 různých koncentrací byly použity jako povrchově aktivní látky.Byla naměřena primární data zádrž plynu vs. průtok plynu. Kritický bod to jest průtok plynu, při kterém ustavený homogenní režim v koloně ztrácí svou stabilitu a nastupuje režim přechodový byl vyhodnocen několika způsoby. Kritické hodnoty průtoku a odpovídající zádrže byly uvažovány jako kvantitativní měřítko stability homogenního režimu.

Classification

  • Type

    J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

  • CEP classification

    CI - Industrial chemistry and chemical engineering

  • OECD FORD branch

Result continuities

  • Project

    Result was created during the realization of more than one project. More information in the Projects tab.

  • Continuities

    Z - Vyzkumny zamer (s odkazem do CEZ)

Others

  • Publication year

    2008

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Chemical Engineering Science

  • ISSN

    0009-2509

  • e-ISSN

  • Volume of the periodical

    63

  • Issue of the periodical within the volume

    4

  • Country of publishing house

    GB - UNITED KINGDOM

  • Number of pages

    17

  • Pages from-to

  • UT code for WoS article

  • EID of the result in the Scopus database