Application of rough hard-sphere theory to diffusion in n-alkanes

Abstract

Tracer diffusion coefficients are reported for n-alkane solutes in n-dodecane, n-eicosane, n-eicosane, and n-octacosane in the temperature range 304–533 K at 1.38 MPa. Rough hard-sphere theory is used to interpret the data. The translational-rotational coupling parameters are determined for each solute-solvent pair at each temperature. The nature of the coupling parameter and the possibility of relating it to molecular properties and temperature in a homologous series are discussed.

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Erkey, C., Rodden, J.B., Matthews, M.A. et al. Application of rough hard-sphere theory to diffusion in n-alkanes. Int J Thermophys 10, 953–962 (1989). https://doi.org/10.1007/BF00503164

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Key words

  • hard-sphere theory
  • n-alkanes
  • roughness factor
  • tracer diffusion