A review of common practices in gravimetric and volumetric adsorption kinetic experiments

Author:

Wang Jin-Yu,Mangano Enzo,Brandani StefanoORCID,Ruthven Douglas M.

Abstract

AbstractThe availability of commercial gravimetric and volumetric systems for the measurement of adsorption equilibrium has seen also a growth of the use of these instruments to measure adsorption kinetics. A review of publications from the past 20 years has been used to assess common practice in 180 cases. There are worrying trends observed, such as lack of information on the actual conditions used in the experiment and the fact that the analysis of the data is often based on models that do not apply to the experimental systems used. To provide guidance to users of these techniques this contribution is divided into two parts: a discussion of the appropriate models to describe diffusion in porous materials is presented for different gravimetric and volumetric systems, followed by a structured discussion of the main trends in common practice uncovered reviewing a large number of recent publications. We conclude with recommendations for best practice to avoid incorrect interpretation of these experiments.

Funder

University of Edinburgh

Publisher

Springer Science and Business Media LLC

Subject

Surfaces and Interfaces,General Chemical Engineering,General Chemistry

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