Thermal dehydration of the sodium carbonate hydrates

A thermal gravimetric method was employed to explore the course of dehydrat ion of Na2CO3 . 10 H2O and Na2CO3 . H2O particles. Experimental data were a massed both in the temperature-increasing and constant temperature mode. Ve ry small sample masses were used in an effort to eliminate an effect of hea t and mass transfer processes on the rate of reaction. Kinetic equations of Arrhenius type were proposed for two stages of the dehydration and tested against the results collected by experiment.