Synergetic effect of multicomponent additives on limestone when assessed as a thermochemical energy storage material

The effect of adding both Al2O3 and ZrO2 to limestone (CaCO3) enhance the cyclic stability reaction kinetics endothermic CO2 desorption exothermic absorption is investigated. formation CaZrO3 Ca-Al-O compounds, e.g. CA5Al6O14, evident, which enables a substantial >80% capacity retention over 50 calcination/carbonation cycles. additives enable fast where an 80% energy storage reached within 20–30 min, attributed synergetic having Ca-Zr-O ternary present. inert nature formed compounds prevents sintering particles, whilst allowing ion migration throughout crystal structures, catalysing carbonation reaction.