The self-explanatory lecture students follow the road map balance, noting the gray area is the supercritical region.
The three (triple point) on the phase diagram is the intersection of the curve of CO2 status change. At the same time there exist three solid, liquid and gas.
Supercritical CO2 (CO2 super critical) is liquid at the conditions exist at or above the critical temperature and critical pressure.
CO2 supercritical often is used as a solvent extraction organic compounds of high purity required, and the solvent is removed easily after extraction.
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