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Modeling of Crude Distillation Unit

Hartono, Nasibah (2010) Modeling of Crude Distillation Unit. Universiti Teknologi PETRONAS. (Unpublished)

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Abstract

Modeling of CDU is today the foundation to almost any operation including design, control, planning and retrofitting of the refinery plant. The purpose of this project is to develop Rigorous model of Crude Distillation Unit (CDU) and also to study the dynamic behavior of the model. In other to develop more accurate model, linearized Francis Weir formula is selected to model liquid flow dynamic. Beside Francis Weir, two different assumptions are studied to improve the model, which are constant molar flow and non-constant flow. In constant molar flow model, the column is assumed to be constant pressure so the vapor flow for each stage is the same and therefore the energy equations is neglected. Since the dynamic model can be subjected to disturbance and used for over a wide pressure, the assumption is not accurate and therefore non constant molar flow assumption is important. The scope of work in this project is firstly to perform Rigorous modeling for CDU where mass, energy balance, equilibrium relation and Francis Weir formula where all the equations are developed. Then, in other to get input properties for the model, process modeling simulator, ASPEN HYSYS is used to simulate CDU. The famous computer algebra, MATLAB is used to solve the dynamic rigorous model simultaneously. Lastly, the results of the model dynamic behavior will be studied. In this report, only constant molar flow model is solved and discussed where non constant molar flow is only discussed in Literature Review and Methodology due to its complexity and also time constrain. This report consists of 5 main chapters; the I'' chapter which is Introduction briefly explains the problem statement, objectives of research, the scope works and work flow of FYP I and also the Gantt chart. The 2"d chapter which is Literature Review covers the background of Crude Distillation Unit (CDU) and also the theory of distillation to model the CDU. The 3'd chapter which is Methodology will explain the steps on how to develop mathematical modeling, how to determine the inputs from HYSYS and also how to do MA TLAB computational. The 41 h chapter is Results and Discussion which all the results from MA TLAB computational is shown and analyzed. The last chapter consists of Conclusion and Future Recommendation.

Item Type: Final Year Project
Academic Subject : Academic Department - Chemical Engineering - Separation Process
Subject: T Technology > TP Chemical technology
Divisions: Engineering > Chemical
Depositing User: Users 2053 not found.
Date Deposited: 08 Jan 2014 08:30
Last Modified: 08 Jan 2014 08:30
URI: http://utpedia.utp.edu.my/id/eprint/10755

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