An adsorption isotherm equation for multi-types adsorption with thermodynamic correctness

被引：87

作者：

Chakraborty, Anutosh ^{[1
]}

Sun, Baichuan ^{[1
]}

机构：

[1] Nanyang Technol Univ, Sch Mech & Aerosp Engn, Singapore 639798, Singapore

来源：

APPLIED THERMAL ENGINEERING | 2014年 / 72卷 / 02期

基金：

新加坡国家研究基金会;

关键词：

Adsorption; Isotherms; Fermi-Dirac distribution; Langmuir equation; Heterogeneity factor; Load factor; Toth equation; GAS-SOLID ADSORPTION; ENERGETICALLY HETEROGENEOUS SOLIDS; GENERALIZED LANGMUIR EQUATION; PHYSICAL ADSORPTION; CALORIMETRIC HEATS; WATER-ADSORPTION; POTENTIAL THEORY; ADSORBENTS; SURFACES; MICROPORES;

D O I：

10.1016/j.applthermaleng.2014.04.024

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

From the perspective of adsorption energy distribution, the Langmuir adsorption isotherm equation is modified and reformulated on the basis of Fermi-Dirac distribution function. The proposed isotherm model including the loading, the adsorbent-adsorbate interaction and the surface structural heterogeneity factors, overcomes the limitations of the existing isotherm models such as Langmuir, Toth or Dubinin equations. The proposed equation is validated with experimentally measured multi-types of adsorption isotherms according to IUPAC. Non-monotonic adsorption isotherms stemming from Gibbs adsorption could also be described by the proposed adsorption isotherm directly and it is verified with experimental data. The surface energy and structural factors of the modified equation are demonstrated by the energy distribution functions. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：190 / 199

页数：10

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