Kinetic derivation of common isotherm equations for surface and micropore adsorption

• Type: Article in International Scientific Journal
• Date: 2016

Authors

Rui Afonso (Author) FEUP; Luís Gales (Author) FCUP; Adélio Mendes (Author) FEUP

Journal

Title: ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY

Vol. 22 No. 7

Pages: 963-971

ISSN: 0929-5607

Publisher: Springer

Indexing

ISI Web of Knowledge - 14 Citations

ISI Web of Science

Scopus - 18 Citations

INSPEC

Scientific classification

CORDIS: Technological sciences

Associated Projects

LEPABE-2-ECO-INNOVATION - LEPABE-2-ECO-INNOVATION

LEPABE - Laboratório de Engenharia de Processos, Ambiente, Biotecnologia e Energia

PTDC/EQU-EQU/114944/2009 - Desenvolvimento de um sistema autorregenerativo para a remoção de CO2 de sistemas anestésicos em circuito fechado

Other information

Authenticus ID: P-00K-S1Z

DOI: 10.1007/s10450-016-9803-z

Abstract (EN): t The Langmuir equation is one of the most successful adsorption isotherm equations, being widely used to fit Type I adsorption isotherms. In this article we show that the kinetic approach originally used by Langmuir for 2D monolayer surface adsorption can also be used to derive a 1D analogue of the equation, applicable in ultramicropores with single-file diffusion. It is hoped that such a demonstration helps dispel the idea that the Langmuir isotherm equation cannot apply to some micropores as more than a mathematical correlation. We furthermore seek to extend the insight provided by the simple kinetic derivation of the Langmuir equation to other isotherm equations capable of modelling Type I isotherms. The same kinetic approach is thus also used to derive the Volmer, Fowler–Guggenheim and Hill–de Boer equations, both for surface (2D adsorbed phase) and micropore adsorption (1D and 3D adsorbed phases). It is hoped that this will help make more intuitively clear that these equations can be used as phenomenological models in some instances of adsorption in micropores

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9