Influence of pressure on the gas-liquid interfacial area and the gas-side mass transfer coefficient of a laboratory column equipped with cross-flow sieve trays

Badssi, A; Bugarel, R.; Blanc, Christine; Peytavy, Jean‐Louis; Laurent, André

doi:10.1016/0255-2701(88)80003-5

Cited by 16 publications

(10 citation statements)

References 13 publications

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“…As assumed in ref. [12], the diffusivity of CO 2 , D A , in carbonate and bicarbonate solutions and the kinetic constant, k 1 , are assumed to be independent of pressure. Semi-empirical methods have been proposed to predict the diffusion coefficient, the most-used one is that of Wilke and Chang [13]: (7) where l and T are the liquid viscosity and temperature, respectively.…”

Section: Experimental Procedures and Methodologymentioning

confidence: 99%

Influence of Pressure on the Hydrodynamics and Mass Transfer Parameters of an Agitated Bubble Reactor

Maalej¹,

Benadda²,

Otterbein

2001

Chem. Eng. Technol.

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The present study deals with the pressure effects on the hydrodynamic flow and mass transfer within an agitated bubble reactor operated at pressures between 105 and 100 × 105 Pa. In order to clarify the flow behavior within the reactor, liquid phase residence time distributions (RTD) for different operating pressures and gas velocities ranging between 0.005 m/s and 0.03 m/s are determined experimentally by the tracer method for which a KCl solution is used as a tracer. The result of the analysis of the liquid‐phase RTD curves justifies the tank‐in‐series model flow for the operating pressure range. Good agreement is obtained between theoretical and experimental results assuming the reactor is operating as perfectly mixed. Two parameters characterizing the mass transfer are identified and investigated in respect to pressure: the gas‐liquid interfacial area and volumetric liquid‐side mass transfer coefficient. The chemical absorption method is used. For a given gas mass flow rate, the interfacial area as well as the volumetric liquid mass transfer coefficient decrease with increasing operating pressure. However, for a given pressure, a and kLa increase with increasing gas mass flow rates. The mass transfer coefficient kL is independent of pressure.

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Section: Experimental Procedures and Methodologymentioning

confidence: 99%

Influence of Pressure on the Hydrodynamics and Mass Transfer Parameters of an Agitated Bubble Reactor

Maalej¹,

Benadda²,

Otterbein

2001

Chem. Eng. Technol.

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“…Compressed CO 2 is to some extent more viscous than atmospheric CO 2 , but still considerably less viscous than water. Previous works performed in the binary system CO 2 -H 2 O have shown that, under studied pressures and temperatures, changes in viscosity not seem to influence substantially the diffusion coefficient of CO 2 in water solutions [22]. Alternatively, the density of a highly compressible fluid like CO 2 varies rapidly with temperature and pressure, affecting the interfacial properties considerably [23].…”

Section: Mass Transfer Between Co 2 Phase and Water Phase And Formatimentioning

confidence: 98%

Calcite precipitation by a high-pressure CO2 carbonation route

Domingo

Loste

Gómez‐Morales

et al. 2006

The Journal of Supercritical Fluids

106

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“…For the liquid velocity two parameters are commonly used, either U La the liquid velocity based on the active area (Badssi et al, 1988;Scheffe, 1984) or L the liquid rate per weir length (or liquid loading) (El Azrak, 1988;Colwell, 1981). The liquid loading divided by the clear liquid height can be considered as a horizontal characteristic liquid velocity in opposition to U La which represents a vertical characteristic velocity (see Fig.…”

Section: Comparison Between the Two Columnsmentioning

confidence: 99%

“…For these parameters less phenomenological descriptions can be found and the reported expressions are mainly put under a power law form (Badssi et al, 1988;Peytavy et al, 1990;Pohorecki and Moniuk, 1988). Furthermore little experimental work on the mass transfer parameters has been made on reasonably large pilot units to account for the hydrodynamic effects (Scheffe, 1984;El Azrak, 1988;Liang et al, 2008).…”

Section: Introductionmentioning

confidence: 98%

Effect of path length on valve tray columns: Experimental study

Brahem

Royon-Lebeaud

Legendre

2015

Chemical Engineering Science

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Hydrodynamic and interfacial area measurements on two different size columns. Phenomenological correlations proposed for key design parameters. A non-negligible effect of the flow path length on mean emulsion profiles. a b s t r a c tExperimental measurements of hydrodynamic and interfacial area parameters are carried out over two rectangular pilot scale valve tray columns. The effect of tray path length on extrapolation between the two columns is studied and phenomenological correlations for hydrodynamic and interfacial area are proposed. Correlations are compared both to literature and to industrial results showing good agreement and a significant improvement for the prediction of industrial conditions. Discrepancies preventing an accurate description of industrial trends are highlighted through comparison between typical emulsion height profiles on both columns.

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Influence of pressure on the gas-liquid interfacial area and the gas-side mass transfer coefficient of a laboratory column equipped with cross-flow sieve trays

Cited by 16 publications

References 13 publications

Influence of Pressure on the Hydrodynamics and Mass Transfer Parameters of an Agitated Bubble Reactor

Influence of Pressure on the Hydrodynamics and Mass Transfer Parameters of an Agitated Bubble Reactor

Calcite precipitation by a high-pressure CO2 carbonation route

Effect of path length on valve tray columns: Experimental study

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