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Estimation of isosteric heat of adsorption from generalized Langmuir isotherm
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Estimation of isosteric heat of adsorption from generalized Langmuir isotherm
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Journal Article
Estimation of isosteric heat of adsorption from generalized Langmuir isotherm
2023
Overview
Simulation and design of adsorptive separation units demand accurate estimation of thermodynamic properties. Isosteric heat of adsorption as calculated from generalized Langmuir (gL) isotherm coupled with Clausius–Clapeyron expression for pure component and mixed-gas adsorption equilibria is presented in this work. The estimated isosteric heat of adsorption as functions of surface loading and composition is validated against the experimental data for various adsorption systems. Furthermore, the gL results are compared against classical Langmuir (cL) and Toth isotherm for pure components and with Ideal Adsorbed Solution Theory (IAST) for mixed-gas adsorption equilibria. The comparison highlights that gL outperforms cL and Toth for pure component adsorption and IAST for mixed-gas adsorption, and gL reliably captures the loading dependence and the composition dependence for isosteric heat of adsorption.
Publisher
Springer US,Springer Nature B.V,Springer Nature
