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Multicomponent efficiencies in two types of distillation column
Author(s) -
Biddulph M. W.,
Kalbassi M. A.,
Dribika M. M.
Publication year - 1988
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.690340411
Subject(s) - tray , distillation , ternary operation , column (typography) , component (thermodynamics) , point (geometry) , plate column , chemistry , fractionating column , chromatography , process engineering , analytical chemistry (journal) , materials science , biological system , thermodynamics , mathematics , computer science , mechanical engineering , geometry , engineering , physics , biology , connection (principal bundle) , programming language
A study of the efficiencies of two plate distillation columns is reported. One column had three rectangular trays with a flow path length of about 1 m, the other was a modified glass Oldershaw column with one tray of 38 mm dia. Tray efficiencies were measured in both columns and point efficiencies were deduced for the rectangular column. The systems studied were ternary and quaternary mixtures of alcohols and water. The results showed that for thermodynamically nonideal systems significant differences existed among the individual component point efficiencies. In the case of an ideal system the component point efficiencies were effectively equal, but tray efficiencies were different due to differing volatilities and composition profiles across the large trays. This study illustrates the need to allow for the above effects in large‐column designs for multicomponent systems. The possibility of using laboratory‐scale point efficiencies in these designs is explored.