THE KINETICS OF THE ISOTHERMAL DEHYDRATION OF LITHIUM-SULFATE MONOHYDRATE UNDER A SELF-GENERATED TEMPERATURE CONDITION

The rate behavior of the isothermal dehydration of crushed crystals of Li2SO4 . H2O was studied under a self-generated temperature condition by recording the mass loss and temperature deviation from the pre-set isothermal temperature. The sample temperature during the reaction was influenced by the effect of self-cooling. The rate process under such a temperature condition could be divided into three distinct stages: acceleratory, nearly constant rate, and deceleratory periods. The constant rate period was processed kinetically using the Friedman method. The apparent values of Arrhenius parameters during the constant rate process remained constant irrespective of the sample mass examined.