New theory of water activity in heterogeneous systems
- 1 January 1996
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions
- Vol. 92 (6) , 979-983
- https://doi.org/10.1039/ft9969200979
Abstract
A new theory of water activity in heterogeneous porous systems has been proposed in which the observed activity is calculated as the volume average of a local, spatially varying activity determined by the amount of bulk, surface or structural water at each location in the system. The new theory accounts quantitatively for the sorption isotherms in a variety of model porous systems and provides a consistent explanation of freezing point depression and hysteresis during adsorption and desorption.Keywords
This publication has 0 references indexed in Scilit: