Abstract
The kinetics of sodium carbonate formation within a sodalite matrix by an intracage reaction of hydrothermally grown basic nitrite sodalite and carbon dioxide has been studied. This heterogeneous reaction inside the sodalite cages was followed in the 773 K–1153 K temperature interval by thermogravimetry, IR-spectroscopy, as well as X-ray powder diffraction. The weight uptake during heating and the increase of the unit cell volume has been discussed to describe the imbibition of CO2 and the resulting intra-cage carbonate formation.
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