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Effect of the equilibrium relationship on the dynamic characteristics of distillation column sections
Author(s) -
Mohr C. Michael
Publication year - 1965
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.690110215
Subject(s) - fractionating column , distillation , column (typography) , thermodynamics , binary number , dynamic equilibrium , mechanics , chemistry , thermodynamic equilibrium , section (typography) , mathematics , chromatography , physics , geometry , computer science , connection (principal bundle) , arithmetic , operating system
The dependence of the dynamic characteristics of distillation column sections on the shape of the equilibrium relationship and the number of plates comprising the section is discussed. Dynamic characteristics, valid near the steady state operating condition, were obtained for simple column sections separating binary mixtures by a straightforward calculation with a digital computer. Sections with concave downward equilibria respond significantly more slowly than comparable sections with linear equilibria. Sections with concave upward equilibria respond faster. This behavior is explained in terms of the internal recycle within the section. The rate of propagation of a disturbance from end to end in the section is only weakly influenced by the shape of the equilibrium relationship.