Modeling, Design and Simulation of Cyclic Distillation

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Alipour, Mohammad Mehdi | 2019

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 51882 (06)
University: Sharif University of Technology
Department: Chemical and Petroleum Engineering
Advisor(s): Farhadi, Fathollah
Abstract:
Cyclic distillation can bring new life in old distillation columns, by using a periodic operation mode that leads to significant benefits, such as increased column throughput, lower energy requirements and much higher separation performance. The design method for this type of column are reviewed. Among two design approaches, the Lagrangian one is selected, where equations are formulated as delay differential equations, moving from bottom to top of the column to determine feed tray location and total tray numbers. No rigorous design method is selected in order to calculate the column parameters.In this thesis, by defining an economic index that encompasses capital investment, operating costs and production revenues, the operational and design parameters were optimized for highest profits. Optimization is performed by using the genetic algorithm. A penalty function to satisfy hydraulic and operational constraints of the column is defined. Optimization was accomplished for a theoretical and an experimental case, where in both cases an increase of profits in optimal design was observed
Keywords:
Process Intensification ; Cyclic Distillation ; Optimization ; Genetic Algorithm ; Batch Distilation

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