Three-phase distillation. Simulation and application to the separation of fermentation products

✍ Scribed by A. Pucci; P. Mikitenko; L. Asselineau

• Publisher: Elsevier Science
• Year: 1986
• Tongue: English
• Weight: 763 KB
• Volume: 41
• Category: Article
• ISSN: 0009-2509
• DOI: 10.1016/0009-2509(86)87030-0

✦ Synopsis

In recent years, most of the simulation methods proposed for solving distillation problems in which three.-phase distillation occurs use a Newton-Raphson or a comparable approach which requires an initial estimate ofvariables close enough to the final answer. A plate-to-plate calculation which is more likely to converge on the solution is presented here. The phase equilibria are represented by the NRTL model. The position of three-phase stages is solved automatically. Another three-phase distillation program operating at infinite reftux first supplies the location of feeds and/or sidestreams and computes the minimum number of stages for a given separation. An application of the proposed method is illustrated by the rectification of butanol-acetone fermentation products. The calculated results are in good agreement with the experimental data obtained from the operation of a laboratory glass-plate-type column.