Adsorption Isotherms for Binary Gas Mixtures

Broughton, D. B.

doi:10.1021/ie50464a036

Cited by 73 publications

(26 citation statements)

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“…The competitive Langmuir-like model is thermodynamically consistent only when the condition 2 in the previous paragraph is met [17]. Slight differences in molecular sizes or in orientations on the surface could result in the surface not being equally available to all of the competing adsorbates.…”

Section: Competitive Langmuir-like Modelmentioning

confidence: 99%

Prediction of adsorption from multicomponent solutions by activated carbon using single-solute parameters. Part II—Proposed equation

Alkhamis

Wurster

2002

AAPS PharmSciTech

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Section: Competitive Langmuir-like Modelmentioning

confidence: 99%

Prediction of adsorption from multicomponent solutions by activated carbon using single-solute parameters. Part II—Proposed equation

Alkhamis

Wurster

2002

AAPS PharmSciTech

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“…It is a thermodynamically consistent model (11). It can be formulated for the binary case of EA and EC as follows:…”

Section: Theory Competitive Adsorption Isothermmentioning

confidence: 99%

Effect of Solution Polarity and Temperature on Adsorption Separation of Erythromycin A and C onto Macroporous Resin SP825

Jin¹,

Chen²,

Zhu³

et al. 2014

Separation Science and Technology

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In this article, macro-porous resin, SP825, was used as adsorbent for the adsorption separation of erythromycin A (EA) and erythromycin C (EC). The effect of solution polarity and temperature on adsorption of EA and EC with their mixture was determined by batch adsorption experiments in detail. Adsorption isotherms were modeled by competitive Langmuir equations, selectivity coefficients were obtained, and thermodynamic parameters such as changes of Gibbs free energy, enthalpy, and entropy were calculated by van't Hoff relationships. Then, dynamic adsorption and desorption separation experiments with the appropriate solution polarity and temperature obtained from the batch experiments were examined in a fixed-bed. Breakthrough curves were determined to understand the different dynamic adsorption performances for EA and EC. After the adsorption and desorption separation, the mass concentration ratio of EA to EC increased sharply from 9:1 to 25.3:1.

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“…This model is thermodynamically consistent only if the sorption capacity, Q Ld,i , is the same for all solutes [16]. In real systems, this condition is not satisfied, and therefore, it violates the Gibbs-Duhem relationship [3]. Despite of this thermodynamic condition, multicomponent isotherm data can be described with unequal Q Ld values [16].…”

Section: Multicomponent Isotherm Modelsmentioning

confidence: 99%

Modelling the Competitive Sorption Process of Multiple Solutes During their Transport in Porous Media

Avila

Breiter

2008

Environ Model Assess

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A general mathematical model to solve the advection-dispersion transport equation for multiple solutes was developed, where the dual porosity mobile-immobile mass transfer, the two-site non-equilibrium model and firstorder transformation reactions were included. The two-site model was expressed with an equilibrium sorption term and a kinetic term. One of three kinetic models could be used: the non-linear, the bilinear and the pore diffusion model. The traditional Freundlich or Langmuir isotherms were employed to simulate no-interaction between the solutes, but with the extended Freundlich or extended Langmuir isotherms, a competitive sorption could be simulated. The transport equation was solved with the Moving Concentration Slope method. The mathematical model was tested and further simplified by using real data from soil column experiments, with 1,2-cis-dichloroethene and trichloroethene as model contaminants and silica gel and real soil samples as porous medium.

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Adsorption Isotherms for Binary Gas Mixtures

Cited by 73 publications

References 0 publications

Prediction of adsorption from multicomponent solutions by activated carbon using single-solute parameters. Part II—Proposed equation

Prediction of adsorption from multicomponent solutions by activated carbon using single-solute parameters. Part II—Proposed equation

Effect of Solution Polarity and Temperature on Adsorption Separation of Erythromycin A and C onto Macroporous Resin SP825

Modelling the Competitive Sorption Process of Multiple Solutes During their Transport in Porous Media

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