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The Determination of Activity Coefficients at Infinite Dilution with the Help of the Dilutor Technique (Inert Gas Stripping)
Author(s) -
Gruber D.,
Krummen M.,
Gmehling J.
Publication year - 1999
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/(sici)1521-4125(199910)22:10<827::aid-ceat827>3.0.co;2-x
Subject(s) - dilution , distillation , stripping (fiber) , extractive distillation , chromatography , chemistry , inert gas , inert , extraction (chemistry) , activity coefficient , limiting , repeatability , impurity , separation (statistics) , air separation , process engineering , analytical chemistry (journal) , thermodynamics , materials science , mathematics , organic chemistry , oxygen , engineering , statistics , mechanical engineering , physics , aqueous solution , composite material
The activity coefficient at infinite dilution (limiting activity coefficient) represents an important property, which is used in particular for the selection of selective solvents (e.g. extraction and extractive distillation) and for the reliable design of thermal separation processes. The removal of the last traces of impurities causes the largest separation effort. In order to avoid an oversizing of the column (e. g. distillation column) which would lead to an increase of the investment and operating costs, reliable information about the separation factor at infinite dilution is required.