Effects of impurities in the kinetics of calcite decomposition

Abstract The effects of impurities on the observed kinetic parameters of calcium carbonate decomposition were studied. The kinetic parameters observed were found to be strongly affected by small amounts of impurities; however, the kinetic model is not affected. Therefore the activation energy for calcite containing at least 98.2% of calcium carbonate is 110.5 kJ mol −1 and for calcite with 99.5% of calcium carbonate it is 193.8 kJ mol −1 . The kinetic model in both cases is a superficial reaction in cylindrical geometry.