A high tech supercritical carbon dioxide power plant is taking shape behind the walls of a modest building in Texas, with the potential to lower the cost of concentrating solar power systems.
More specifically, it behaves as a supercritical fluid above its critical temperature (304.128 K, 30.9780 °C, 87.7604 °F)[1] and critical pressure (7.3773 MPa, 72.808 atm, 1,070.0 psi, 73.773 bar),[1] expanding to fill its container like a gas but with a density like that of a liquid.
For perspective on that pressure: a US natural gas car fills at 3,600psi (240 Bar)