Adsorbate-adsorbate interactions on microporous materials

Seishi Shimizu; Nobuyuki Matubayasi

doi:10.1016/j.micromeso.2021.111254

Adsorbate-adsorbate interactions on microporous materials

Seishi Shimizu, Nobuyuki Matubayasi

Chemistry

Research output: Contribution to journal › Article › peer-review

Abstract

Simple isotherm models can fit microporous adsorption yet the molecular interactions underlying the successful fitting have often remained obscure. Here we demonstrate how semi-empirical isotherm model data can be mined to reveal the reality of adsorbate-adsorbate molecular interactions. This was made possible by the fluctuation adsorption theory, a rigorous theory based only on the principles of statistical thermodynamics. For microporous carbons, adsorbate-adsorbate interactions quantified from the Dubinin-Radishkevich (DR) and Dubinin-Astakhov (DA) models successfully capture the primary micropore filling mechanism and the subsequent layer adsorption, leading to a liquid-like behaviour of the adsorbates. The microscopic meanings of the DR and DA parameters and the adsorption potential have also been clarified via statistical thermodynamics.

Original language	English
Article number	111254
Journal	MICROPOROUS AND MESOPOROUS MATERIALS
Volume	323
DOIs	https://doi.org/10.1016/j.micromeso.2021.111254
Publication status	Published - 18 Jun 2021

Bibliographical note

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10.1016/j.micromeso.2021.111254

Micropor Mesopor Mat accepted author
© 2021 Elsevier Inc. All rights reserved. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy.
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Cite this

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