Previous works in the literature proposed the utilization of a reversible gas-solid reaction within a packed bed reactor for storing electricity. In this setup, electricity is introduced during the charging phase by operating a compressor to both pressurize and heat the gas above the decomposition temperature of the metal oxide, known as the equilibrium temperature. When the material is subjected to temperatures above the equilibrium temperature, the oxidized material reduces, whereas if the temperature is less than the equilibrium temperature, the reduced material oxidizes. The previous work only focused on using the redox reaction as a mechanism to store electricity due to the possibility of using air during both charging and discharging. However, hydration and carbonation can provide alternatives with potential advantages and disadvantages. The hydroxide reaction offers some notable advantages over the redox reaction. Firstly, dry air can be used to dehydrate the solids during the charge cycle. Therefore, the working fluid during charging no longer contains a high volume percentage of the reactive gas, making it easier to proceed with the endothermic reaction. During discharge, air can be humidified to advance the hydration reaction. While air can no longer be used with the carbonation reaction as the working fluid, storing CO2 in the supercritical phase significantly reduces the space required for gas storage. A comparative analysis between the performance of these storage mechanisms is carried out by adopting new system designs and configurations during both charging and discharging for each of these chemical reaction families.