This contribution provides a critical review of gas physisorption in the textural characterization of porous solids, with the focus on the artifacts in experimental data that lead to serious misinterpretation of the results derived from the analysis of adsorption isotherms. Apart from the problems related to the determination and interpretation of the BET area, we paid particular attention to the issues associated with the determination of pore size distribution; for example, the choice of the correct branch of the hysteresis loop and the network effects. Pitfalls in the analyses using either the classical macroscopic or the advanced microscopic (DFT, GCMC) methodology are addressed. The ultimate aim is to provide guidance for proper calculations and correct interpretation of physisorption data.

Department of Chemistry Faculty of Science University of Ostrava 30 dubna 22 70103 Ostrava Czech Republic

Graduate School of Technology Industrial and Social Sciences University of Tokushima 2 1 Minamijosanjima Tokushima 770 8506 Japan

School of Chemical Engineering University of Queensland St Lucia QLD 4072 Australia

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