Binary diffusion coefficients of some organic compounds in carbon dioxide at 313.2 K and 16.0/25.0 MPa were measured by using the Taylor-Aris tracer response technique. We propose a new correlation of Schmidt numbers as a function of solvent molar volumes for predicting binary diffusion coefficients in dense C 0 2 and self-diffusion coefficients of dense C 0 2 . The correlation was also found to be valid for predicting self-diffusion coefficients of dense CH, at F,/A* <40 or u2/ ( 4 ) 0 > 1.62.

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