Generalization of thermodynamic Langmuir isotherm for mixed‐gas adsorption equilibria

Hamid, Usman; Vyawahare, Pradeep; Tun, Hla; Chen, Chau‐Chyun

doi:10.1002/aic.17663

Generalization of thermodynamic Langmuir isotherm for mixed‐gas adsorption equilibria

Journal Article · Mon Mar 07 00:00:00 EST 2022 · AIChE Journal

DOI:https://doi.org/10.1002/aic.17663· OSTI ID:1848009

^[1]; ^[1]; Tun, Hla ^[1]; ^[1]

Department of Chemical Engineering Texas Tech University Lubbock Texas USA

Abstract

This work presents a comprehensive thermodynamic model for both pure component isotherms and mixed‐gas adsorption equilibria. A generalization of thermodynamic Langmuir isotherm, the proposed model assumes competitive adsorption of multiple adsorbates on adsorbent surface for mixed‐gas adsorption equilibria, and it applies an area‐based adsorption nonrandom two‐liquid activity coefficient model in the activity coefficient calculations for the adsorbate phase. The resulting generalized Langmuir isotherm properly captures both surface loading dependence and adsorbate phase composition dependence for mixed‐gas adsorption equilibria. The model is validated with accurate representations of gas adsorption equilibrium data for varieties of unary, binary, and ternary gas systems. The model results are further compared with those calculated from extended Langmuir isotherm and Ideal Adsorbed Solution Theory.

View Accepted Manuscript (Publisher)

Sponsoring Organization:: USDOE

Grant/Contract Number:: EE0007888

OSTI ID:: 1848009

Journal Information:: AIChE Journal, Journal Name: AIChE Journal Journal Issue: 6 Vol. 68; ISSN 0001-1541

Publisher:: Wiley Blackwell (John Wiley & Sons)Copyright Statement

Country of Publication:: United States

Language:: English

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