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Tracer diffusion in methanol, 1‐butanol and 1‐octanol from 298 to 433 K
Author(s) -
Chen S.H.,
Evans D. F.,
Davis H. T.
Publication year - 1983
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690290418
Subject(s) - thermal diffusivity , chemistry , tracer , solvent , krypton , diffusion , methanol , octanol , thermodynamics , argon , analytical chemistry (journal) , chromatography , partition coefficient , organic chemistry , physics , nuclear physics
Diffusion coefficients of argon, krypton, xenon, methane, carbon tetrachloride and the tetraalkyltins (methyl through butyl) were measured in methanol, 1‐butanol and 1‐octanol over the temperature range 298 to 433 K. With temperature‐dependent solvent diameters fitted from the tracer diffusivity of one of the solutes, a rough‐hard‐sphere theory predicts well the observed tracer diffusivity over the solvent density range in which hard‐sphere computer simulations are available. The Wilke‐Chang correlation predicts diffusion coefficients in the higher alcohols with an average error of 80% and a maximum error of 200%. A correlation of the form Dμp/T = A where p and A depend on solute and solvent size is more successful giving an average error of 7% and a maximum error of 24%.