about Supercritical Fluids...

I suppose most of the readers of this blog, if there are some, should know what a Supercritical Fluid is.
Just in case...
A SCF is defined as a substance above its critical temperature (TC) and critical pressure (PC). The critical point represents the highest temperature and pressure at which the substance can exist as a vapour and liquid in equilibrium.
In the figure you can see the transition from the gas-liquid equilibrium to de Supercrítical Fluid.
You can find more information elsewhere... like here, here or here ...
or just type "Supercritical Fluids" on Google!