Accuracy of Dubinin-Astakhov and Dubinin-Radushkevich Adsorption Isotherm Models in Evaluating Micropore Volume of Bentonite

Authors

  • Navid Saeidi
    Affiliation

    Faculty of Chemical, Gas and Petroleum Engineering, Semnan University, Semnan 35195-363, Iran

  • Mehdi Parvini
    Affiliation

    1Faculty of Chemical, Gas and Petroleum Engineering, Semnan University, Semnan 35195-363, Iran

https://doi.org/10.3311/PPch.8374

Abstract

Accuracy of Dubinin-Astakhov (DA) and Dubinin-Radushkevich (DR) isotherm models were examined for evaluating micropore volume of several natural and pillared bentonite samples with type I and II isotherms. Afterwards, the obtained results were compared with the micropore volume calculated by Horvath–Kawazoe (HK) model. The results showed that the accuracy of DA and DR models for this purpose depends on isotherm types and range of relative pressure (P/P0) in which the models are applied. It can be generally concluded that DA and DR can be used to calculate micropore volume of bentonite instead of HK which imposes more complicated calculations.

Keywords:

Bentonite, Micropore volume, Dubini-Astakhov and Dubinin-Radushkevich equations, Horvath and Kawazoe method, Type of isotherms

Published Online

2015-10-07

How to Cite

Saeidi, N., Parvini, M. “Accuracy of Dubinin-Astakhov and Dubinin-Radushkevich Adsorption Isotherm Models in Evaluating Micropore Volume of Bentonite”, Periodica Polytechnica Chemical Engineering, 60(2), pp. 123–129, 2016. https://doi.org/10.3311/PPch.8374

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Section

Articles