DIFFUSION-COEFFICIENTS OF THE HALOCARBONS CCL2F2 AND C2CL2F4 WITH SIMPLE GASES

Binary diffusion coefficients for halocarbons CCl2F2 (R12) and C2Cl2F4 (R114) with H-2, N2, and He are reported, together with the corresponding temperature dependence coefficient in the 298-343 K region. Experimental results are obtained from the arrested-flow chromatographic method. The precision of the experimental diffusivities is within 2%, but predicted values with the equations of Fuller-Schelter-Giddings or Lennard-Jones differ substantially from those measured.