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Diffusivities of low‐volatility species in light gases
Author(s) -
Ravindran Periasamy,
Davis E. J.,
Ray A. K.
Publication year - 1979
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.690250607
Subject(s) - boiling point , chemistry , volatility (finance) , dibutyl phthalate , aerosol , mie scattering , vapor pressure , collision theory , analytical chemistry (journal) , light scattering , collision frequency , thermodynamics , scattering , collision , ion , chromatography , organic chemistry , optics , physics , computer security , computer science , financial economics , economics
Gas‐phase diffusivities for high boiling point organics in common gases are determined by evaporating a single submicron aerosol droplet of the organic species, while it is suspended in an electric field in the path of a polarized laser beam. The droplet size is measured as a function of time by using Mie theory to determine the size from the light scattering data of intensity versus angle. In addition to diffusivities, the Lennard‐Jones molecular interaction potential parameter, ϵ ii , and the collision diameter σ ii , are found, by applying the molecular theory of gases to interpret the evaporation rate data. Results are compared with available empirical and semi‐theoretical correlations for diffusivities and Lennard‐Jones parameters. The low vapor pressure organics used here are dioctyl phthalate (DOP), dibutyl sebacate (DBS) and dibutyl phthalate (DBP), and the carrier gases are helium, nitrogen and carbon dioxide.