What's wrong with Lagergreen pseudo first order model for adsorption kinetics?

被引：141

作者：

Rodrigues, Alirio E. ^{[1
]}

Silva, Carlos Manuel ^{[2
]}

机构：

[1] Univ Porto, Fac Engn, Dept Chem Engn, Associate Lab LSRE Lab Separat & React Engn, Rua Dr Roberto Frias S-N, P-4200465 Oporto, Portugal

[2] Univ Aveiro, Dept Chem, CICECO Aveiro Inst Mat, Campus Univ Santiago, P-3810193 Aveiro, Portugal

来源：

CHEMICAL ENGINEERING JOURNAL | 2016年 / 306卷

关键词：

Adsorption; Glueckauf model; Kinetics; Lagergreen model; Linear system; Mass transfer; DRIVING-FORCE MODEL;

D O I：

10.1016/j.cej.2016.08.055

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Adsorption processes can be modeled on the basis of phenomenological principles using conservation, equilibrium and transport kinetics equations. However many times an empirical approach is followed using pseudo first order and pseudo second order models to describe adsorption kinetics. In this short communication we discuss the use of Lagergreen model (pseudo first order kinetic model) and compare it with the linear driving force model of Glueckauf for a linear adsorption equilibrium isotherm. A relation between the kinetic constants of both models is derived, being possible to disclose they exhibit very distinct dependency with temperature whatever the porous structure of the adsorbent particle. In conclusion, care must be taken when using the short-cut approach of pseudo first order expressions, taking into account their theoretically inconsistent trends. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：1138 / 1142

页数：5