e-SPRESSO WEBINAR: Desiccants- To dry or not to dry? Sorption capacity and enthalpy measurements

e-SPRESSO WEBINAR: Desiccants- To dry or not to dry? Sorption capacity and enthalpy measurements

Desiccants are an important class of materials used in food and drug preservation, gas drying for industrial processes, dehumidification in living and working spaces, even air cooling in a suitable heat exchanger. Water sorption capacity and the adsorption/desorption enthalpies are essential properties that need to be measured in order to understand and predict both working effectiveness and regeneration.

Key insights:

- Vapor sorption mechanisms

- Water vapor sorption isotherms

- Static-volumetric measurement technique

- Heat of sorption calculations

In this webinar, you will learn how materials accumulate water (and other vapors) on their surface and in their pores. Water vapor sorption isotherms obtained by the static-volumetric method will be presented and discussed together with the Clausius-Clapeyron approach to determining sorption enthalpy calculations.

Dr. Martin Thomas (English)
Martin Thomas

Dr Martin A. Thomas has more than forty years of industrial experience in the characterization of powders and porous materials. After studying for his Master’s degree in analytical chemistry and then his Doctorate in inorganic/physical chemistry - both at the School of Chemistry, University of Birmingham (UK) - he joined Cookson Group's Central Research labs where he began his specialization in powders and porous materials. He joined ICI's Catalyst Research Centre (now a Johnson-Matthey facility) in 1985 and spent six years as a Principal Research Officer in charge of porous materials characterization.

In 1991 Dr. Thomas joined Quantachrome Instruments which became part of Anton Paar in 2018. He is currently serving as Lead Scientist for the Surface and Pores product line at Anton Paar.

Dr. Martin Thomas has authored several research articles and books and has also been co-author of ten patents relating to porous materials and their characterization.


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