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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, a T-shaped microchannel with 600μm wide and 200μm deep in continuous phase and 70mm wide and 20mm deep in dispersed phase by flowing two immiscible solutions, buffer solution containing aluminum and tributyl phosphate as dispersed phase.
58 citations
TL;DR: In this paper, the effects of pressure on the liquid-phase mass transfer coefficient at the free gas-liquid interface and on the volumetric coefficient k L a at the gas-bubble liquid interface in a stirred vessel were studied with various gas liquid systems in the pressure range 2-100 atm.
58 citations
TL;DR: In this article, the behavior of three different compositions based on nickel ferrite,nickel oxide and copper cermets was investigated as anode materials in laboratory electrolysis tests for 50h in a conventional cryolite-based electrolyte.
Abstract: The behaviour of three different compositions based on nickel ferrite–nickel oxide–copper cermets was investigated as anode materials in laboratory electrolysis tests for 50h in a conventional cryolite-based electrolyte. The corrosion of the anodes was assumed to be mass transfer controlled and the transfer of impurities into the electrolyte and subsequently into the cathodically deposited metal was studied. The results indicate that the materials corroded in a controlled manner. Mass transfer coefficients of species from the anode to the electrolyte were of the order of 10−4ms−1 while the mass transfer coefficients for transfer of the species from the electrolyte into the deposited metal were of the order of 10−6ms−1. Nickel exhibited significantly lower mass transfer coefficients than those of iron and copper. The extrapolated corrosion rates of the anode ranged 1.2–2.0 cm year−1, which is acceptable from an industrial perspective. The contamination of the deposited aluminium with respect to Ni and Cu was, however, too high to meet current specifications for commercial grade metal. Post-electrolysis examination of the anodes showed that a reaction layer of approximately 50μm thickness was formed on the anodes. This layer did not contain any metal grains and seemed to prevent preferential corrosion of the metal phase in the underlying cermet.
58 citations
TL;DR: In this paper, a shell-and-tube heat-exchange ttype of hollow fiber module was considered for treatment of a wastewater containing toluene, trichloroethane (TCE) and methylene chloride.
58 citations
TL;DR: The results of laboratory scale studies conducted to delineate the effect of such parameters on the kinetics of adsorption of metal ions are reported in this paper, where various physical parameters such as effective diffusion coefficient, activation energies and entropy of activation are evaluated, as these provide some information regarding the mechanistic aspects.
Abstract: The waste slurry generated in fertilizer plants in India has been converted into a cheap carbonaceous adsorbent material. The prepared adsorbent has been characterised and used for the removal of lead and chromium metals. The kinetics of adsorption and the extent of adsorption at equilibrium are dependent on the physical and chemical characteristics of the adsorbate, adsorbent and experimental system. Results of laboratory scale studies conducted to delineate the effect of such parameters on the kinetics of adsorption of metal ions are reported. Parameters evaluated include: hydronium ion concentration, temperature, initial adsorbate concentration, size of adsorbent, and amount of adsorbent. On the basis of these studies the various physical parameters such as effective diffusion coefficient, activation energies and entropy of activation are evaluated, as these provide some information regarding the mechanistic aspects. Mass transfer coefficient values suggest a rapid transport of the adsorbate from bulk to solid phase.
58 citations