User:Darsie42/CO2-Battery

Dissolve CO2 from air or carbon capture in sodium carbonate solution and get sodium bicarbonate:

CO2 + Na2CO3 + H2O --> 2 NaHCO3 (1)

Charging the battery:

In a heat exchanger heat the sodium bicarbonate to get CO2:

CO2 + Na2CO3 + H2O <--heat-- 2 NaHCO3 (2)

Store the hot sodium carbonate solution. Compress the CO2 with an electric compressor. Use the released heat for (2), which liquefies the CO2. Store the liquid CO2 e.g. in bladders 800 m under water.

Discharging the battery:

Pump liquid CO2 into a heat exchanger to heat it with the hot sodium carbonate solution. You get hot CO2 gas and cold sodium carbonate solution. Create electricity with hot CO2 and a turbine. Dissolve the CO2 in the sodium carbonate solution and get sodium bicarbonate (1).