A Novel Differential Thermal Analysis Method for Quantifying the Sorption Capacity of Smectite Clay

Paul O'Brien and Colin J. Williamson
Department of Chemistry, Queen Mary and Westfield College, University of London Mile End Rd., London E1 4NS, United Kingdom

Abstract: The enthalpy of freezing of methyl salicylate sorbed by four commercial montmorillonite clays was used to estimate the absorption/adsorption capacity of the clay. Differential thermal analysis was therefore employed to give a quantitative estimate of the sorption capacity of the clay for methyl salicylate. The absorption capacity of the clay depended on the state of hydration and ranged from 30.4% for an 8% water content to 9.7% for a montmorillonite containing 24% water.

Key Words: Adsorption • Differential thermal analysis • Hydration • Methyl salicylate • Smectite

Clays and Clay Minerals; June 1990 v. 38; no. 3; p. 322-326; DOI: 10.1346/CCMN.1990.0380312
© 1990, The Clay Minerals Society
Clay Minerals Society (www.clays.org)