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Showing 1 to 20 of 89 for “"Mass transfer coefficient"”.
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The effect of varying phase velocities and the direction of flow on the mass transfer coefficient in a horizontal extractor tube
… with varying phase velocities on the overall, mass-transfer coefficient in a horizontal, unpacked, extraction tube, for the system n-butanol-water, and for the system 1,1,2-trichloroethane-sectione-water.
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The Effects Of Diffusion, Capillary Heterogeneity, And Porous Media Morphology On CO2 Migration In Porous Media
… a finite difference model and the effective mass transfer coefficient is determined and linked to various styles of capillary heterogeneity. Results show that an increase in saturation does not result in an increase in mass transfer coefficient rather, the surface area, which in turn is …
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Evaluation of mass transfer in a catalytic distillation column using hydrogenation of 1 -hexene as a test reaction
… experimentally the overall vapour/liquid mass transfer coefficient, and to develop a simple model for evaluating the effect of chemical reaction on the overall vapour/liquid mass transfer coefficient.
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Factors affecting the extraction efficiency of an experimental, liquid-liquid, sieve-plate, pulse extractor
… and pulse amplitude on the overall mass transfer coefficient. The equipment used was operated at a temperature of 25±1 ºC, and consisted of a two-inch diameter glass column with eight sieve plates having 1/16-inch diameter holes on triangular centers, and a plate-free area of …
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Analysis of Pore -Scale Nonaqueous Phase Liquid Dissolution in Etched Silicon Pore Network
… areas were used as input parameters to calculate mass transfer coefficients for dissolution in all micromodel experiments. Mass transfer coefficients for the homogeneous and heterogeneous micromodels initially increased with water velocity but then leveled off to a relatively constant value. Also, …
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Towards an understanding of mass transfer and hydrodynamics in packed bed reactors using Nuclear Magnetic Resonance
… magnetic resonance (NMR) techniques to study mass transfer and hydrodynamic phenomena that govern the performance of packed bed reactors. The aim of this work is to gain insight into factors that affect the process of fines deposition and mass transfer inside packed beds to ultimately enable …
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A fundamental approach to predicting mass transfer coefficients in bubble column reactors
… high gas-liquid interfacial area, high heat and mass transfer rates, low maintenance requirements and operating costs. On the other hand, attempts at modelling and simulation are complicated by lack of understanding of hydrodynamics and mass transfer characteristics. This complicates design …
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The effect of interfacial tension on the rate of mass transfer in ternary liquid-liquid extraction
… the effect of interfacial tension on the rate or mass transfer by obtaining extraction data for the above systems in a horizontal, countercurrent liquid-liquid extraction tube for a series of interfacial tension values achieved through variation of the total acetone concentration in the system; …
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Studies On Copper Extraction With Hydroxyoxime Extractants For The Design Of Hollow Fibre Membrane Based Extraction Processes
… in the literature to assess the equilibrium and mass transfer data of metal extraction by the use of chelating agents. The limitations of these techniques and models have been highlighted.<br/><br/>Three chelating extractants diluted in EscaidllO were used to study the extraction equilibrium of …
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Mass transfer coefficients and effective area of packing
The effective mass transfer area (a [subscript e]), liquid film mass transfer coefficient (k [subscript L]), and gas film mass transfer coefficient (k [subscript G]) of eleven structured packings and three random packings were measured consistently in a 0.428 m packed column. Absorption of CO₂ with …
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Vibrations for improving multiphase contact
… In a bubble column reactor, enhancements of mass transfer coefficient and gas hold up were experimentally studied for the air-water system. Mass transfer coefficient enhancements up to 500% and gas hold-up improvements up to 200% were achieved under the application of low amplitude (0.5-2.5 …
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Study of the Performance of a Large Mechanically-Agitated Extraction Column
… and coalescence, axial mixing, single drop mass transfer mechanisms and flooding/phase-inversion, and related mathematical models have been reviewed. An experimental study was performed of the hydrodynamic and mass transfer characteristics of a 0.45m diameter, 4.3m high Rotating Disc …
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Study on the thermodynamics and kinetics of the stripping of palladium from a typical palladium organic
… speed and type on the overall volumetric mass transfer coefficient. which was the major focus of this thesis.
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A numerical analysis of condenser performance of a seawater desalination system
… parameters of a condenser such as heat and mass transfer coefficient, surface effectiveness and condensate flow rate. The parameters that were changed in the analysis were the face velocity of air, the water velocity, and the number of rows of tubes. The numerical analysis was done based on …
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Packed bed reactors at the pellet scale: magnetic resonance studies of hydrodynamics, mass transport and reaction
… techniques to investigate the hydrodynamics, mass transport and reaction occurring at the pellet scale within packed bed reactors. The aim of this work is to gain physical insight into the processes occurring at the pellet scale, which can subsequently be applied to optimize the catalyst and …
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Mechanisms of liquid extraction in a pilot plant sieve plate column
… pertinent to droplet hydrodynamics and mass transfer in perforated (sieve)plate liquid-liquid extractor columns has been reviewed. An experimental investigation was conducted in a 450 mm diameter perforated plate extractor with four plates using four different designs with holes of 1.588 …
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Mass Transfer Characteristics of Large Oscillating Drops
The literature related to mass transfer of solute from large, oscillating drops in liquid-liquid systems has been critically reviewed. A thermostatically-controlled spray column, provided with mirrors, was used to study the hydrodynamics and mass transfer characteristics of single large oscillating …
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Mass transfer characteristics of two-aqueous-phase liquid-liquid mixtures
Mass transfer rates were studied using the falling drop method. Cibacron Blue 3 GA dye was the transferring solute from the salt phase to the PEG phase. Measurements were undertaken for several concentrations of the dye and the phase-forming solutes and with a range of different drop sizes, e.g. …
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Drying of portland cement raw material slurries:predicting the performance of a counter-current spray drier
… on. A mathematical model for estimating crust mass transfer coefficient at high drying temperatures was derived.
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