This company wants to use carbon dioxide to store renewable power on the grid
Compressing gases to store energy isn’t new: for decades, a few facilities around the world have been pumping air into huge underground caverns under pressure and then using it to generate electricity in a natural gas power plant. But Energy Dome turned to carbon dioxide because of its physics. Carbon dioxide, when squeezed to high enough pressures, turns into a liquid, which air doesn’t do unless cooled down to ultra-low temperatures. The liquid carbon dioxide can fit into smaller steel tanks close to where renewable…