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Reactive liquid‐liquid test system Zn/Di (2‐ethyl hexyl) phosphoric acid/ n ‐Dodecane. Equilibrium and kinetics
Author(s) -
Wachter Bruno,
Bart HansJörg,
Moosbrugger Thomas,
Marr Rolf
Publication year - 1993
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.270160610
Subject(s) - mass transfer , chemistry , thermodynamics , kinetics , dodecane , reaction rate constant , kinetic energy , equilibrium constant , rate equation , law of mass action , mass transfer coefficient , reaction rate , chemical kinetics , chromatography , organic chemistry , physics , catalysis , quantum mechanics
This contribution reviews the models for equilibrium and kinetics of the system Zn/D2EHPA/ n ‐dodecane (and other diluents), published during the past decade, as well as values of the appropriate model parameters, i.e. of equilibrium and reaction rate constants. The reviewed kinetic models comprise those for kinetic, diffusional and mixed mass transfer regimes. It is shown that, under certain conditions, the rate equation within the kinetic regime has the same mathematical structure as the equations for the overall mass transfer rate within the diffusional and mixed mass transfer regimes. This means that the same equation interprets experimental data from each of the three regimes. Thus, a fit of experimental data to a model is not sufficient for discriminating between the mass transfer regimes. Results of kinetic experiments, using a stirred mass transfer cell with constant interfacial area, are presented.