Diabatic column optimization compared to isoforce columns

This paper analyzes and compares optimization results for simulated diabetic columns to theoretically derived optimization results from the isoforce method for the same system. The separation of ethanol and water is used to illustrate the two methods and bring out their common and special features....

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Bibliographic Details
Published inEnergy conversion and management Vol. 38; no. 15; pp. 1777 - 1783
Main Authors Sauar, Erik, Rivero, Ricardo, Kjelstrup, Signe, Lien, Kristian M.
Format Journal Article Conference Proceeding
LanguageEnglish
Published Oxford Elsevier Ltd 01.10.1997
Elsevier
Subjects
Applied sciences
Chemical engineering
Diabatic distillation
Distillation
Energy efficient design
Entropy
Equipartition of forces
Exact sciences and technology
Exergy
Isoforce operation
Isoforce operation
Entropy
Exergy
Diabatic distillation
Equipartition of forces
Energy efficient design
Distillation
Water
Energy equipartition
Ethanol
Exergy analysis
Diabatic state
Numerical simulation
Binary mixtures
Thermodynamic properties
Optimization
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Summary:This paper analyzes and compares optimization results for simulated diabetic columns to theoretically derived optimization results from the isoforce method for the same system. The separation of ethanol and water is used to illustrate the two methods and bring out their common and special features. The results, which are presented in McCabe-Thiele diagrams, show partial compatibility between the methods. The isoforce method is found to require total reflux ratios close to the azeotrope, and a reformulation of the method is suggested. It is also shown that the separation work obtained in an adiabatic stripping column can not be achieved in a diabatic column without adding a (distributed) condenser in the upper section of the column, or more plates.
ISSN:0196-8904
1879-2227
DOI:10.1016/S0196-8904(96)00201-4