An electrochemically regenerative hydrogen—chlorine energy storage system for electric utilities

Electrolysis of HCl and storage of hydrogen and chlorine is proposed as a means for energy storage for the electric utility industry. An economic evaluation is presented which shows that the system has a clear advantage over the hydrogen—air storage system and is comparable in cost to gas turbines. The system is flexible, allowing both energy storage and hydrogen production for industrial purposes, and lends itself easily to scale-up. Assuming that the R&D goals of this new system are met, it will compete successfully with all other electric energy storage devices presently considered.