
612 Principles of Sustainable Energy Systems
© 2008 Taylor & Francis Group, LLC
10.7.3 Thermochemical Storage
Thermochemical energy is stored as the bond energy of a chemical compound. In thermo-
chemical energy storage, atomic bonds are broken during a reversible chemical reaction
and are catalyzed by an increase in temperature. After thermochemical separation occurs,
the constituents are stored apart until the combination reaction is desired. Recombination
of the bonds between atoms releases the stored thermochemical energy.
Reversible chemical reactions with reactants and products that can be easily stored as
liquids and/or solids are of in