Modeling and analysis of internal heat integrated distillation columns

Citation
Kj. Huang et al., Modeling and analysis of internal heat integrated distillation columns, CHIN J CH E, 7(1), 1999, pp. 67-76
Citations number
24
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Chemical Engineering
Journal title
CHINESE JOURNAL OF CHEMICAL ENGINEERING
ISSN journal
1004-9541 → ACNP
Volume
7
Issue
1
Year of publication
1999
Pages
67 - 76
Database
ISI
SICI code
1004-9541(199903)7:1<67:MAAOIH>2.0.ZU;2-B
Abstract
A generalized steady-state model is being developed for an internal heat in tegrated distillation column (IHIDiC). A procedure incorporating the Newton -Raphson method is devised for solving the model equations. Separation of a n ethanol-water binary mixture is simulated and analyzed with the model. Tw o pinch points are found within the process, making the separation extremel y difficult and expensive. Two sharp fronts in the temperature and the comp osition profiles are being observed. With the introduction of heat integrat ion, satisfactory separation may be obtained in a limited number of stages with lower reflux ratios. Increasing the pressure difference between the re ctifying and the stripping sections, however, would bring about a reduced r elative volatility between the two components involved, creating adverse se paration performances. It is obvious that optimization of the IHIDiC is of prime importance.