Improvement ofPGB Depropanizer Column Model by Removing Ideal Mixture Assumption

• Main Author: Mat Sidek, Mohd Hirmi
• Format: Final Year Project
• Language: English
• Published: Universiti Teknologi Petronas 2004
• Subjects: TP Chemical technology
• Online Access: http://utpedia.utp.edu.my/8535/1/2004%20-%20Improvement%20of%20PGB%20Depropanizer%20Column%20Model%20By%20Removing%20Ideal%20Mixture%20Assumption.pdf; http://utpedia.utp.edu.my/8535/

This report entitled "Improvement of PGB Depropanizer Column Model by Removing Ideal Mixture Assumption" is basically a dissertation report for the Chemical Engineering Final Year Research Project. Since a long time ago, chemical engineers have been dealing with a lot of optimization methods for distillation column. The optimization is crucial because the best parameters are needed so that the desired product of distillation column can be achieved and also saving energy consumed in the plant which automatically saves million of dollars for the plant. The main purpose of this research is to improve the de-propanizer column modeling by removing the ideal mixture assumption made in the early stage of this project. The results obtained are compared with the results obtained from HYSYS by using the plant data of PGB De-Propanizer Column. The final objective of this project is to show the results in the form of graphical user interface, GUI. The modeling for the non-ideal mixture was done by using the MA TLAB 7.0 software. First of all, mass balance was done by using the narrow feed boiling procedure and it was converged by applying the theta-convergence method. Then, the energy balance calculation was taken into consideration by calculating the energy balance for ideal system and nonideal system. Singular Value Decomposition (SVD) method was used for the convergence of matrix. Comparison of results between results obtained from MODEL with the results obtained from HYSYS was made. The results were presented in the form of graphical user interface GUI for more users friendly. Several results were obtained for mass balance and energy balance and discussed in the discussion section. Some recommendations were made for future improvement of the model. This project is crucial as optimization of distillation column is one of the most important features to be achieved by the engineers in any plant. This is because any changes in the data and operating parameters such as the temperature and pressure of the column will results to the difference in compositions of product and by-product. It is hoped that this model will be used as a tool for engineers to obtain desired parameters and would predict the results of the actual distillation column by referring to the model.