Using CO2 to generate power will revolutionize how power is generated, built, and distributed. Using super critical CO2 to run the turbines for electricity generation instead of conventional steam(water). We all know that water boils at 100 degree C ,but the boiling point can be raised by increasing the pressure, a further increase in pressure and temperature leads us to a point at which the latent heat of vapourisation is zero, or there is no boiling. Water directly becomes steam. This is the Critical Pressure and the Critical Temperature. For steam this occurs at 374 deg C and 220.6 bar.
In super critical condition the density of gas and liquid becomes equal .The critical point for carbon dioxide occurs at a pressure of 73.8 bar and a temperature of 31.1°C. These parameters make equipment design and reaction set-up relatively simple. For water this occurs at 374 deg C and 220.6 bar. The great advantage of CO2 over water it reaches SCF state at almost room temperature.
CO2 is not produced in the the SCF process, rather already existing CO2 is used. There is no addition to any greenhouse effect.
The use of CO2 in power turbines has been an active area of research for a number of years, and now multiple companies are bringing early stage commercial products to market.
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