圖1-1.超臨界流體的壓力–溫度相圖
Fig.1-1.Schematic pressure-temperature phase diagram for a pure component showing the supercritical fluid (SCF) region.The triple point (T) and critical point (C) are marked.The blue circles represent the variation in density of the substance in the different regions of the phase diagram.Note that the density varies continuously between the liquid state and the gas state,providing that the liquid-gas equilibrium line (T-C) is not crossed.[15]
圖1-2.超臨界二氧化碳物理（密度和傳輸）性質(zhì)的可調(diào)節(jié)性
Fig.1-2.Pressure-tunability of density and transport properties of supercritical fluids in the near-critical region.[16]
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[15] Cooper A.I.Polymer synthesis and processing using supercritical carbon dioxide [J].J.Mater.Chem.,2000,10:207-234.[16] Subramaniam B.Enhancing the stability of porous catalysts with supercritical reaction media [J].Applied Catalysis A:General,2001,212:199-213.