Study of Carbonation of CaO for High Temperature Thermal Energy Storage
In view of its potential application to high temperature heat energy storage, carbonation of CaO with various CO<SUB>2</SUB> pressures is investigated in the temperature range 873–1173 K by using a thermogravimetric analyzer under atmospheric conditions. For a given temperature, although the reaction takes place for a partial pressure of CO<SUB>2</SUB>, <I>P</I>, higher than the equilibrium CO<SUB>2</SUB> pressure of CaCO<SUB>3</SUB>, <I>P</I><SUB>e</SUB>, the reaction rate shows a slight increase with increasing <I>P</I>. On the other hand, for a given <I>P</I>, the rate increases rapidly with increasing temperature from 973 to 1023 K, above which it decreases gradually. By applying a grain model and assuming the presence of a reaction intermediate, a possible reaction rate equation has been developed.
- Journal of chemical engineering of Japan
Journal of chemical engineering of Japan 31(2), 281-284, 1998-04
The Society of Chemical Engineers, Japan