DTA/TG Analysis And Phase Changes Of Activated Na2CO3

Abstract

Sodium carbonate material is used as a good sorbent of carbon dioxide from the atmosphere, and has gained increasing importance in environmental protection.In order to enhance its sorption ability, mechanochemicaly activatied sodium carbonate was investigated,and the occurred changes after the activation and the relaxation time in a controlled environment were monitored. Activation was performed in a vibro-mill for 2 and 7 minutes, and the activated samples were placed in an atmosphere of carbon dioxide at a humidity of 95 % for 96 hours, (the relaxation time). Differential thermal and thermogravimetric analyses were applied with the aim of determining the changes that occurred on the activated samples during the relaxation period.The decomposition temperature change of activated Na2CO3 samples, mass loss, and conversion degree of Na2CO3 to NaHCO3 was monitored depending on activation and relaxation time periods.