Thermophysical properties of limestone as a function of origin (Part 2): Calcination enthalpy and equilibrium temperature

The influence of the origin of different limestones on the reaction enthalpy at calcination temperature and on the equilibrium temperature was experimentally determined. The reaction enthalpy at standard temperature seems to be independent of the origin and it is specified as 178 kJ/mol in the literature. The reaction enthalpy at calcination temperature varies between 160 and 172 kJ/mol for four different limestones. The equilibrium temperature at 1 bar CO2 varies between 907 and 923°C for 18 different limestones.These values are independent of the particle size.Therefore, both researched properties depend significantly on the nature of the limestone.