Journal
MICROPOROUS AND MESOPOROUS MATERIALS
Volume 132, Issue 3, Pages 572-575Publisher
ELSEVIER
DOI: 10.1016/j.micromeso.2010.03.034
Keywords
Gassorption; Brunauer-Emmett-Teller; Dubinin-Radushkevich; t-Plot; Evaluation models
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Three of the most common methods to analyze sorption isotherms with respect to micropore volume and specific surface, respectively, are the Brunauer-Emmett-Teller (BET) theory, established for the specific surface area of meso- and macroporous materials, the t-plot-method, which separates micropore from multilayer adsorption and the micropore analysis based on the work of Dubinin and Radushkevich (DR). While BET-analysis is assumed to be sensitive to multilayer adsorption on the external surface area, the DR-method is expected to be in particular sensitive to the micropores. However, the data for a series of synthetic carbons investigated reveal that the values derived by both methods are equivalent, despite the different underlying assumptions. (C) 2010 Elsevier Inc. All rights reserved.
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