Topic
Mass transfer coefficient
About: Mass transfer coefficient is a research topic. Over the lifetime, 7827 publications have been published within this topic receiving 168354 citations.
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TL;DR: In this article, Sherwood-number relations for prediction of the mass-transfer coefficient for developing concentration boundary-layer have been obtained for laminar flow-regime from first principles The common flow-modules, namely, rectangular channel, tubular and radial crossflow are considered The relationships developed include the effect of suction through the membrane Relevant relations for estimation of mass transfer coefficient for cross-flow reverse osmosis and ultrafiltration are formulated
72 citations
TL;DR: This paper showed that liquid-liquid extractions with microporous membranes will be more rapid when the membrane is wetted by the phase having the higher solubility for the solute being transferred.
72 citations
TL;DR: In this paper, the effects of various physical properties on the dispersed phase mass transfer coefficient was carried out for both nonoscillating and oscillating liquid droplets falling in a single stream through stationary continuous liquid phases.
Abstract: An experimental investigation of the effects of various physical properties on the dispersedphase mass transfer coefficient was carried out for both nonoscillating and oscillating liquid droplets falling in a single stream through stationary continuous liquid phases. The Colburn and Welsh two-component technique was used to isolate and measure the disperesed-phase resistance to mass transfer. This technique limited the experimental study to systems with low interfacial tensions, between 2.5 and 5.8 dynes/cm. Solute was transferred into the droplets, and the droplet concentration was measured after droplet-fall heights ranging from about 2 cm. to 103 cm. Precautions were taken to minimize end effects.
The experimental mass transfer rates on nonoscillating droplets in general were greater than that predicted by the Kronig and Brink model for nonoscillating circulating droplets. Experimental Sherwood numbers for four liquid systems were correlated in terms of a relationship involving the dispersed-phase Schmidt number, the Weber number, and the time group, 4DLtc/d2e, which allows for the time dependency of the transfer mechanism. The data were correlated with an average absolute deviation of 34%. The Kronig and Brink and Newman relations fitted the experimental data for nonoscillating droplets with an average absolute deviation of 46 and 54%, respectively. The experimental results for the oscillating droplets were correlated by two relationships with an average absolute deviation of 10.5%. The Handlos and Baron model fitted the experimental results for oscillating droplets with an average absolute deviation of 38%.
72 citations
TL;DR: In this paper, the authors aimed the mass transfer investigation in the removal of organic contaminants from water by the pervaporation process and used terpolymer ethene-propene-diene (EPDM) as the selective elastomer.
72 citations
TL;DR: A mathematical model for spiral wound reverse Osmosis membrane module is presented in this article, which incorporates spatial variations of pressure, flow, solvent flux and solute concentration on the feed channel side of the module.
72 citations