This thesis is focused on the study of a new way of storing thermal energy coupled with already mature CSP technologies in order to enhance their competitiveness in the energy market. Currently the main solutions for existing CSP plants, as thermal energy storage, are based on sensible heat storage technology made using molten salt at high temperature. The alternative way studied in this work is instead based on the exploitation of chemical bonds. The heat is not simply stored but is used to drive an endothermic reversible chemical reaction where the products act as the actual energy storage. The inverse exothermic reaction is then the energy releasing step.