SOLUBILITY BEHAVIOR OF SOLIDS AND LIQUIDS IN COMPRESSED GASES

A one-pass flow system for the determination of the solubilities of so lids and liquids in compressed gases is described. The solubilities of styrene in supercritical carbon dioxide ar different conditions are d etermined. The range of temperatures covered is 323-333 K and pressure s 8.0-24.0 MPa. An equation representing solubility behavior is derive d from the solvation concept, the equilibrium constant of the high pre ssure reaction and the rules of the phase equilibrium. This is compare d with the experimental results, and very good agreement is obtained. Some experimental results from the literature are also reproduced by m eans of this equation, and very good agreement with these experimental results is found, as in previous examples. Agreement between values o f a(0), obtained from parameter fitting by this equation and those fro m the literature is very good. The relation between the parameter a(1) , of the equation and the second virial coefficients is also discussed . (C) 1998 Elsevier Science B.V.