Contribution of liquid-and gas-side mass transfer coefficients to overall mass transfer coefficient in Taylor flow in a microreactor

• Autorzy: Sobieszuk P. , Ilnicki F. , Pohorecki R.

Identyfikatory

DOI

10.2478/cpe-2014-0003

• Języki publikacji: EN

Abstrakty

EN

Gas-liquid microreactors find an increasing range of applications both in production, and for chemical analysis. The most often employed flow regime in these microreactors is Taylor flow. The rate of absorption of gases in liquids depends on gas-side and liquid-side resistances. There are several publications about liquid-side mass transfer coefficients in Taylor flow, but the data about gas-side mass transfer coefficients are practically non existent. We analysed the problem of gas-side mass transfer resistance in Taylor flow and determined conditions, in which it may influence the overall mass transfer rate. Investigations were performed using numerical simulations. The influence of the gas diffusivity, gas viscosity, channel diameter, bubble length and gas bubble velocity has been determined. It was found that in some case the mass transfer resistances in both phases are comparable and the gas-side resistance may be significant. In such cases, neglecting the gas-side coefficient may lead to errors in the experimental data interpretation.

Słowa kluczowe

EN

Taylor flow; mass transfer coefficients; microreactor; CFD simulations

PL

przepływ Taylora; współczynnik przenikania masy; mikroreaktor; symulacje CFD

• Wydawca: Komitet Inżynierii Chemicznej i Procesowej Polskiej Akademii Nauk
• Czasopismo: Chemical and Process Engineering
• Rocznik: 2014
• Tom: Vol. 35, nr 1
• Strony: 35--45
• Opis fizyczny: Bibliogr. 19 poz., rys., tab.

Twórcy

autor

Sobieszuk P.

• Faculty of Chemical and Process Engineering, Warsaw University of Technology, Warynskiego 1, 00-645 Warsaw, Poland

autor

Ilnicki F.

• Nalecz Institute of Biocybernetics and Biomedical Engineering, Polish A cademy of Sciences, Ks. Trojdena 4; 02-109 Warsaw; Poland

autor

Pohorecki R.

• Faculty of Chemical and Process Engineering, Warsaw University of Technology, Warynskiego 1, 00-645 Warsaw, Poland

Bibliografia

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