SCF as Solvent Substitutes

Carbon dioxide (CO2) in its supercritical fluid state (scCO2) is distinguished as the most commonly used SCF solvent for several reasons: it is readily available, it is a reusable gas, and it has a low critical temperature (Tc) of 31.1 °C and relatively low critical pressure (Pc) of 72.8 bar. Typical applications, operated by means of supercritical fluids (SCFs), are the extraction of hop constituents, decaffeination of tea and coffee, and the separation of lecithin from oil, all of which are high-pressure processes, which are performed on a large industrial scale.
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