Thermogravimetric Analysis of Moisture in Natural and Thermally Treated Clay Materials.

ABSTRACT: Clays are a class of porous materials; their surfaces are naturally covered by moisture. Weak thermal treatment may be considered practical to remove the water molecules, changing the surface properties and making the micro- and/or mesoporosities accessible to interact with other molecules. Herein, a modulated thermogravimetric analysis (MTGA) study of the moisture behavior on the structures of five, both fibrous and laminar, clay minerals is reported. The effect of the thermal treatment at 150 °C, which provokes the release of weakly adsorbed water molecules, was also investigated. The activation energies for the removal of the adsorbed water (Ea) were calculated, and they were found to be higher, namely, from 160 to 190 kJ mol^-1, for fibrous clay minerals compared to lamellar

SUBMITTER: Lo Dico G 

PROVIDER: S-EPMC11123035 | biostudies-literature | 2024 May

REPOSITORIES: biostudies-literature