Study of Carbonation of CaO for High Temperature Thermal Energy Storage.

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  • Kyaw Kyaw
    Research Center for Advanced Waste and Emission Management, Nagoya University
  • Kubota Mitsuhiro
    Department of Energy Engineering & Science, Nagoya University
  • Watanabe Fujio
    Department of Energy Engineering & Science, Nagoya University
  • Matsuda Hitoki
    Research Center for Advanced Waste and Emission Management, Nagoya University
  • Hasatani Masanobu
    Department of Energy Engineering & Science, Nagoya University

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  • Study of Carbonation of CaO for High Temperature Thermal Energy Storage(SC)
  • Study of Carbonation of CaO for High Te

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Abstract

In view of its potential application to high temperature heat energy storage, carbonation of CaO with various CO2 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 CO2, P, higher than the equilibrium CO2 pressure of CaCO3, Pe, the reaction rate shows a slight increase with increasing P. On the other hand, for a given P, 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.

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