Premium
Determination of Vapor Phase Diffusivity for Toluene‐Air System and for Benzoic Acid‐Air System
Author(s) -
Yuan H. C.,
Cheng M. H.
Publication year - 1967
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.196700001
Subject(s) - thermal diffusivity , chemistry , benzoic acid , toluene , diffusion , thermodynamics , mass diffusivity , analytical chemistry (journal) , vapor phase , phase (matter) , chromatography , organic chemistry , physics
There are several methods available for determination of diffusion coefficients. Stefan diffusion tube was most widely used for the measurement of vapor phase diffusivity in binary systems. It was proved theoretically that the radial concentration profile may be negligible in a thin cyclindrical section. It was also shown theoretically that the velocity profile does not affect the mass flux. This report considered longtitudinal diffusivity alone. The diffusivity of toluene‐air system was measured from 40°C to 70°C and that of benzoic acid‐air system was estimated from 140°C to 160°C.