Adsorption from binary solution in slit shaped pores

Borówko, M.; Borówko, Piotr; Rżysko, W.

doi:10.1002/bbpc.19971010711

Cited by 7 publications

(2 citation statements)

References 39 publications

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“…Earlier investigations presented in the papers [4,7,19] suggest a higher selectivity of adsorption in respect to preferentially adsorbed component for solids containing narrower micro-or mesopores. Some effects should be also expected for the studied microporous carbons.…”

Section: Adsorption From Solutionsmentioning

confidence: 97%

Influence of differences in porous structure within granules of activated carbon on adsorption of aromatics from aqueous solutions

Deryło–Marczewska

Goworek

Świątkowski

et al. 2004

Carbon

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Section: Adsorption From Solutionsmentioning

confidence: 97%

Influence of differences in porous structure within granules of activated carbon on adsorption of aromatics from aqueous solutions

Deryło–Marczewska

Goworek

Świątkowski

et al. 2004

Carbon

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“…However, the above-mentioned equations may only be used for correlations while they lack the possibility to predict surface excess isotherms. Simulation methods like the Monte Carlo method may offer the possibility to predict surface excess isotherms but are rarely used until now, particularly since they are limited to simple systems with respect to the pore shape and the adsorbed species. At this point the success of group contribution methods in the prediction of vapor−liquid equilibrium (VLE) or liquid−liquid equilibrium (LLE) suggests a similar approach for the calculation of adsorption processes.…”

Section: Introductionmentioning

confidence: 99%

Correlation and Prediction of Liquid-Phase Adsorption on Zeolites Using Group Contributions Based on Adsorbate−Solid Solution Theory

et al. 1999

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Both correlation as well as prediction of experimental data for the adsorption of various binary liquid mixtures of alkanes and alkenes on NaX at different temperatures are presented. The theoretical background is based on the adsorbate−solid solution theory which conceives the adsorbed phase to be a mixture of the adsorbed species (adsorbate) and the adsorbent as an additional component. With the introduction of the Gibbs excess energy GE* for this hypothetical mixture, activity coefficients and composition of the adsorbed phase may be calculated. The Gibbs excess energy and thus the activity coefficients of the adsorbed species depend strongly on the energetic heterogeneity of the solid surface which may be described by use of so-called group contribution models. These approaches, until now widely applied to predict fluid-phase equilibrium, are derived from statistical thermodynamics and take into account the energetic interactions between the respective components. For the application of this approach on thermodynamics of adsorption zeolites have to be divided into different functional groups such as SiO2, AlO2 -, and the respective cations. The interaction energies between these active sites and the functional groups of the adsorbed liquid molecules represent fundamental parameters of activity coefficient models based on group contributions such as UNIFAC. These parameters were determined by fitting four different adsorption systems. With the fitted values, six other systems were predicted. Both correlation and prediction include adsorption data at different temperatures. All calculations show excellent results with a mean relative deviation of 4.2% for the correlation and a mean deviation in the range of 8−17% for the predictions.

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