Journal ArticleDOI
Gas‐liquid mass transfer in three‐phase fluidized beds with viscous pseudoplastic liquids
TLDR
In this article, a semi-theoretical relation for the effective shear rate of liquid phase volumetric mass transfer coefficients for oxygen was derived in three-phase fluidized beds of 8 mm glass spheres fluidized by a cocurrent flow of air and pseudoplastic polysaccharide solutions (carboxymethyl cellulose, xanthan).Abstract:
Liquid phase volumetric mass transfer coefficients for oxygen were determined in three-phase fluidized beds of 8 mm glass spheres fluidized by a cocurrent flow of air and pseudoplastic polysaccharide solutions (carboxymethyl cellulose, xanthan). A semi-theoretical relation for the effective shear rate was suggested. The mass transfer coefficients could be correlated, together with literature data for particle diameters of 3 mm and 5 mm in other liquids, using the terminal velocity as the particle-specific property.read more
Citations
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Journal ArticleDOI
Heat and mass transfer in three-phase fluidized-bed reactors—an overview
Sang Done Kim,Yong Kang +1 more
TL;DR: In this paper, the authors examined the heat and mass transfer characteristics in three-phase (gas-liquid-solid and liquid-liquid solid) fluidized beds to provide prerequisite knowledge for reactor design.
Journal ArticleDOI
Gas−Liquid Mass Transfer in High-Pressure Bubble Columns
TL;DR: In this article, the mass transfer coefficient in bubble columns under high-pressure and moderate-temperature conditions was investigated by utilizing an oxygen desorption method, and it was shown that system pressure, temperature, gas and liquid velocities, liquid properties, and column dimensions are major factors affecting mass transfer.
Journal ArticleDOI
Effect of some solid properties on gas–liquid mass transfer in a bubble column
TL;DR: In this paper, the effect of the solids on the mass transfer characteristics in a bubble column was studied experimentally for the systems air/water/expandable polystyrene (EPS) beads and air/Water/glass beads.
Journal ArticleDOI
Using image analysis in the study of multiphase gas absorption
TL;DR: In this paper, the effect of the presence of solids on the mass transfer characteristics in a bubble column was experimentally studied for the air-water-calcium alginate beads system.
Journal ArticleDOI
Promotion of oxygen transfer in three-phase fluidized-bed bioreactors by floating bubble breakers
TL;DR: The results indicate that the liquid‐phase volumetric oxygen transfer coefficient can be enhanced up to 20‐25% and exhibits a maximum with respect to the volume ratio of the floating bubble breakers to the fluidized solid particles.
References
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Journal ArticleDOI
Heat Transfer in Aerated Tower Filled with Non-Newtonian Liquid
Journal ArticleDOI
Viscous media in tower bioreactors: Hydrodynamic characteristics and mass transfer properties
A. Schumpe,W. D. Deckwer +1 more
TL;DR: In this paper, a review of tower reactors with viscous liquids on flow regime, effective shear rate, liquid mixing, gas holdup and gas/ liquid mass transfer (kLa) is presented.
Journal ArticleDOI
Three-phase fluidization: Some knowledge gaps
TL;DR: The most recent review by ostergaard as mentioned in this paper on the fluid mechanics of three-phase fluidized beds is updated and broadened, and the more manifest knowledge gaps are identified, and a systematic classification of the various modes of three phase fluidization is presented in order to provide some perspective on the research which has been done and on that which has yet to be done.
Journal ArticleDOI
Gas-liquid mass transfer in fluidized particle beds
TL;DR: In this article, a gas/liquid mass transfer in air/water fluidized beds of 0.05-8 mm glass spheres in a 0.14 m diameter reactor was studied.
Journal ArticleDOI
Momentum transfer to Newtonian and non-Newtonian fluids flowing through packed and fluidized beds
TL;DR: In this article, a generalized average shear-stress-shear-rate relationship is derived and found to predict the flow behavior of power law as well as non-power law fluids.
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Heat and mass transfer in three-phase fluidized-bed reactors—an overview
Sang Done Kim,Yong Kang +1 more