mass transfer coefficient between fluid and particles agitated tank

Mass transfer in agitated vessels: energetic aspects

transfer coefficients is obtained using an electrochemical method and the influence of the most pertinent hydrodynamic parameters (impeller speed and fluid residence time inside the vessel) is

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Power Consumption and Gas-Liquid Mass Transfer in a Hot ...

The gas-liquid volumetric mass transfer coefficient k L a was measured by the steady-state sulfite feeding method (SFM) (Imai et al., 1987). The measurements show that the location of DO probe has no influence on the results of k L a , and the probe location was finally kept constantly at l / T =1 to determine k L a .

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AGITATED VESSEL MASS TRANSFER - Thermopedia

The rate of mass transfer N B of a component B between phases 1 and 2 can be expressed simply as an overall mass transfer coefficient K multiplied by the total interfacial contact area A and the overall equivalent concentration driving force.

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Mass transfer between a fluid and an immersed object in ...

– The mass transfer in the presence of particles is more intensive, hence the values of the mass transfer coefficient are greater in both the two-phase systems (packed and fludized bed) than with liquid flow around a single sphere.

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LIQUID-SOLID MASS TRANSFER IN A THREE PHASE DRAFT TUBE ...

Mass transfer to particles submerged in a fluid is generally described by ... determined mass transfer coefficients in both agitated tanks and bubble columns for a number of spherical and non spherical particles and were able to correlate all their data with a standard deviation of 30.8%. They conclude that the effects of equipment geometry and the method of flow energy supply are negligible ...

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Particle−Liquid Mass Transfer Coefficient in Two-/Three ...

Experimental determination of intraparticle diffusivity and fluid film mass transfer coefficient using batch contactors Junpei Fujiki , Noriyoshi Sonetaka , Kian-Ping Ko , Eiji Furuya Chemical Engineering Journal 2010 160 (2), 683-690

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Index Terms IJSER

Abstract—In this research, the rate of mass transfer from the wall of a dual impeller agitated vessel was studied. The variable studied The variable studied were the physical properties of the solution, the speed of rotation of the impellers and the length of the clearance between the two

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Mass transfer for suspended solid particles in agitated ...

Mass transfer coefficients were measured for particles suspended in agitated, baffled tanks. The coefficients for a given particle size and a given fluid vary with the 0.10 to 0.15 power of the ...

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liquid-to-particle mass transfer in a stirred batch ...

Stirred tank bioreactorOxygen mass transfer coefficientsImpellers ... Hydrodynamic and Mass Transfer Study in a Mechanically Stirred ... turbine (CD6) radial impellers, with the same geometrical similarities.

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Oxygen mass transfer in a stirred tank bioreactor using ...

2013-01-07· Oxygen mass transfer coefficient. Gas-liquid contact is a matter of decisive importance for describing systems involving biological processes. Mass transfer between phases may often become the limiting step of the overall process rate.

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Experimental & Empirical Correlations for the ...

Kazim, Syeda Anam, "Experimental & Empirical Correlations for the Determination of the Overall Volumetric Mass Transfer Coefficients of Carbon Dioxide in Stirred Tank Bioreactors" (2012). Electronic Thesis and Dissertation Repository . 815.

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GAS - LIQUID MASS TRANSFER IN AGITATED TANKS …

Figure 1 describes mass transfer between a liquid with no insoluble solids and a gas. In Figure 1, C l is the bulk liquid phase benzene concentration, C l-int is the liquid phase benzene concentration at the interface, C g-int is the

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Oxygen mass transfer and hydrodynamics in a multi-phase ...

In this study, oxygen volumetric mass transfer coefficients were determined for an 11L airlift vessel containing tap water alone, tap water with Nylon 6,6 polymer beads (10%v/v), and tap water with silicone rubber beads (10%v/v), over various inlet gas flow rates, with the

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THE EFFECT OF SOLID MICRO PARTICLES ON MASS TRANSFER IN ...

particles) measured in the agitated tank at 30 DC and a gas flow of1 llmin Table 5-3: O2 absorption rate into 0.8 M sulphite solution (with 1 g 11 of activated carbon) measured in the agitated tank at 30 DC and a gas flow of1 llmin

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Mass transfer to suspended particles in gas-liquid ...

Mass Transfer to Suspended Particles in Gas-Liquid Agitated Systems G. M. Marrone and D. J. Kirwan Department of Chemical Engineering University of ia Charlottesville,…

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Transport of heat and mass between liquids and spherical ...

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.

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(PDF) Solid-liquid mass transfer coefficients in gas-solid ...

The research on mass transfer coefficients in solid-liquid agitated systems has received substantial attention in the past, due both to the interest in fundamental aspects of mass transfer between ...

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Solid-liquid Mass Transfer in an Agitated Dissolution ...

Solid-liquid mass transfer in an agitated vessel has been studied extensively during the last few decades but the knowledge is limited to low solids concentration systems.

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MASS TRANSFER BETWEEN FINE PARTICLES AND LIQUIDS IN ...

The mass transfer coefficients between solid particles and turbulent liquids were measured in agitated vessels. For large particles characterized by large …

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Mass Transfer and Reaction Rate | Mixing

The paper, Fundamentals of Mass Transfer and Kinetics for the Hydrogenation of Nitrobenzene to Aniline, outlines the steps to calculate the mass transfer coefficient, and prods warnings about misleading information in agitation studies in catalytic hydrogenation.

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TRANSFER OF 0 2 FROM AIR TO MINERAL SLURRIES IN A …

Rushton turbine agitated tank 1111 V s = superficial gas velocity (m/s) 13,)' = exponents Values for the exponents reported in the literature show a large variation: 0.4 < 13 < 1 and 0 < y < 0.7.

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Determination of the convective mass transfer coefficient ...

The convective mass transfer coefficient evaluation In all experiments, neither the Reynolds number nor the temperature affected the mass transfer coefficient. During the tests, the agitated system was fully turbulent and the temperature was stable at 30 °C.

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Determination of the Effect of Suspended Nanosized ...

Particles on Mass Transfer Rate in an Agitated Vessel ... to the mass transfer coefficient of the base fluid, increased up to 8 times in axial direction and up to 3 times in radial direction. The highest values of (k 1 /k 2) were measured for turbine with 30 o in axial direction and for the turbine as 45o in radial direction. The effect of (H/d) was observed only in axial direction. Keywords ...

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Agitated vessel particle-liquid mass transfer: A ...

Mass transfer from suspended solids in agitated vessels has been explained by both the Kolmogoroff and the terminal velocity-slip velocity theories.

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Mass transfer to microparticles in agitated systems ...

The former mechanism, which is just Harriott’s Mass transfer to microparticles in agitated systems 2791 concept of slip velocity (Harriott, 1962), seems in- enabled us to disregard entirely the gravity effects in adequate to explain the results found here. The high the correlating equation, even when the power input viscosity of the liquid systems mainly used in this work by mechanical ...

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The Design of Agitated Dissolution Tanks | SpringerLink

Abstract. We propose a theoretical and experimental approach for optimizing agitated dissolution tanks to minimize energy requirements. Semiempirical equations for estimation of the mass transfer coefficient and the minimum impeller speed for suspension are reported.

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Effect of Mixed Liquor Suspended Solids (MLSS) on Mass ...

type systems, Krampe and Krauth , cornel et al. , Germain and Stephenson , and Henkel et al. have investigated the effect of MLSS on mass transfer coefficient (k L …

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The effect of solid micro particles on mass transfer in ...

Thesis (Ph.D.)-University of KwaZulu-Natal, Durban, 2008.

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Mass transfer to particles: Part I. Suspended in agitated ...

Please review our Terms and Conditions of Use and check box below to share full-text version of article. I have read and accept the Wiley Online Library Terms and ...

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