Transport and kinetics in two phase systems

Albery, W. John; Couper, A. M.; Hadgraft, Jonathan; Ryan, Charles W.

doi:10.1039/f19747001124

Cited by 34 publications

(21 citation statements)

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“…Free energies of activation can thus be calculated from eq. [6]; these are shown in Table 2. The free energies for the complete transfer process, A;Ge, can, of course, be calculated from the distribution coefficients, and thus the free energies of activation for the reverse reaction, AGPi*, can be calculated.…”

Section: Resultsmentioning

confidence: 99%

“…Certainly, the length and degree of branching of the alkane chain of the acid has little effect on the height of the free energy barrier. Equation [6] may be expressed in a slightly expanded form I /~I C Y C L E~I S~~ [7] The frequency factor, Z , taken as 100 m/s at 25°C as in Fig. 3. is assumed proportional to VT (15 For personal use only.…”

Section: Resultsmentioning

confidence: 99%

“…[6] [6] ki = Z exp (AGif IRT) where AGi* is the free energy of activation a n d 2 is a frequency factor, usually taken as (RT/2nm)112 where m is the reduced mass (15,16). Thus Z has a value close to 100 mls at 25OC.…”

Section: Resultsmentioning

confidence: 99%

“…support the shear stress necessary to allow it to be rotated in isolation and thus to establish rotating Experimental disc hydrodynamics at both sides of the interface. Apparatus Albery et al (5,6) have partially solved this The diffusion cell was built according to the design of Albery problem by introducing a porous filter disc into the et al (5). For the experiments described here, dodecane containing dissolved alkanoic acids was placed in a rotating interface' The disc is with one of the two cylinder whose end was closed with a porous filter disc.…”

Section: Introductionmentioning

confidence: 99%

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The transfer of alkanoic acids from dodecane to water

Sagert¹,

Quinn²,

Dixon³

1981

Can. J. Chem.

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A rotating diffusion cell was used to study the transfer of five alkanoic acids from dodecane to water under conditions of known interfacial area and hydrodynamics. The acids studied were acetic, butanoic, hexanoic, 2-methylbutanoic and 2,2-dimethylpropanoic acids. Small interfacial resistances to mass transfer were noted, the mass transfer coefficients for interfacial transfer being in the range 2.6 to 4.7 pmls at 25°C. This small range means that the effects of the length and structure of the alkane chain on the resistance to mass transfer are minimal. A study of the temperature dependence of the resistance to mass transfer at the interface showed that the resistance is largely entropic rather than enthalpic. On a utilisk une cellule de diffusion rotative pour etudier le transfert de cinq acides alcanoiques, du dodecane B I'eau dans des conditions ou la surface interfaciale et I'hydrodynamique sont connus; on a 6tudie les acides suivants: butanoique, hexanoique, methyl-2 butanoique et dimethyl-2,2 propanoique. On a note de faibles resistances interfaciales au transfert de masse; les coefficients de transfert de masse lors du transfert interfacial sont de I'ordre de 2,6 4,7 pmls B 25°C. Ce faible Ccart signifie que les effets de la longueur des chaines et la structure de I'alcane influencent tres faiblement la resistance au transfert de masse. Une etude de I'effet de la temperature sur la resistance au transfert de masse i I'interface i montre que la resistance est plutBt de nature entropique que de nature enthalpique.[Traduit par le journal]

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The transfer of alkanoic acids from dodecane to water

Sagert¹,

Quinn²,

Dixon³

1981

Can. J. Chem.

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“…An alternative approach to the study of liquid|liquid extraction processes involves the rotating diffusion cell (RDC), introduced by Albery and co-workers [154][155][156] and modified by Manzanares et al [157] and Kralj and Dryfe [158,159], to study the simple and facilitated ion transfer reactions by external polarization.…”

Section: Methodologies Based On Forced Hydrodynamic Conditionsmentioning

confidence: 99%

Simple Ion Transfer at Liquid|Liquid Interfaces

Vallejo

Ovejero

Fernández

et al. 2012

International Journal of Electrochemistry

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The main aspects related to the charge transfer reactions occurring at the interface between two immiscible electrolyte solutions (ITIES) are described. The particular topics to be discussed involve simple ion transfer. Focus is given on theoretical approaches, numerical simulations, and experimental methodologies. Concerning the theoretical procedures, different computational simulations related to simple ion transfer are reviewed. The main conclusions drawn from the most accepted models are described and analyzed in regard to their relevance for explaining different aspects of ion transfer. We describe numerical simulations implementing different approaches for solving the differential equations associated with the mass transport and charge transfer. These numerical simulations are correlated with selected experimental results; their usefulness in designing new experiments is summarized. Finally, many practical applications can be envisaged regarding the determination of physicochemical properties, electroanalysis, drug lipophilicity, and phase-transfer catalysis.

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