DTA/TG analysis of mechanochemicaly activated sodium carbonate

Abstract

Sodium carbonate is a material that is very good sorbent of carbon dioxide from the atmosphere, and it is a reason of it`s increasing importance in environmental protection. In order to improve it´s sorption characteristics, activation of Na₂CO₃ was performed by mechanochemical procedure and monitoring of changes during the relaxation time. This research is based on differential thermal analysis with thermogravimetry, in order to determine the changes that occurred on the activated samples during the relaxation period under controlled conditions. Sodium carbonate was activated for 2 and 7 minutes in a vibro mill, and then the activated samples were deposited in at room temperature and atmosphere of carbon dioxide at a humidity of 95% for 96h.