Facebook Google Twitter. Password Hide. Remember me. I agree to the Terms. Lost your password? Please enter your email address.
You will receive a link to create a new password. Toggle navigation. Embed Script. Size px x x x x In this example, a simple distillation column to separate Tetrahydrofuran THF from Toluene is simulated. The object of the exercise is to select the product specifications such that profit is maximized. The components are: Tetrahydrofuran and Toluene. Binary interaction parameters are used to correlate lab data with a thermodynamic model.
Enter the Simulation Environment. Connections Column Name T No. The DOF for the column should now be 0. The column should now solve automatically. If it does not, press the Run button to start the solver. Save your case!This instructable will guide you, step-by-step, through modeling an elementary distillation tower using the HYSYS software.Distillation Column Simulation in ASPEN HYSYS
Using HYSYS can drastically reduce the amount of time spent doing distillation tower calculations by hand. While it may take hours to fully complete and understand the model, it is much faster and more reliable than doing numerous calculations by hand. HYSYS also allows the user to modify tower or stream conditions to see how the modifications affect other streams with a few clicks, rather than with numerous more pages of calculations!
Please not that the following tutorial is designed for Chemical Engineering students who are familiar with separations and related terminology.
Did you use this instructable in your classroom? Add a Teacher Note to share how you incorporated it into your lesson. Again, please note that this tutorial is directed towards Windows users. To begin modeling the distillation tower, open a new case. The HYSYS main screen also displays software news, recent cases, and some helpful "getting started" links these are labelled in Figure 2.
Before beginning a simulation, it is first necessary to define all of the necessary tower and stream parameters. The first parameter to define is the fluid package.
Click the fluid package tab on the left side of the screen Figure 3a. Next, click "Add" on the bottom left of the fluid package screen pictured in Figure 3b. Once a fluid package is added, a new "basis" for calculations appears under the fluid packages tab see Figure 4a. The most commonly used fluid package is Peng-Robinson. For this tutorial we will also use Peng-Robinson, however, if your system is known to better follow a different Equation of State, select the appropriate model.
To set the desired fluid package, simply click the option from the "Property Package Selection" window. Once a fluid package is selected it should be highlighted in blue as seen in Figure 4b.
Next, we must define what chemical species are present in the system. For our purposes we will consider a debutanizer, which is designed to separate butane out of a stream containing many different hydrocarbons.
There is also a search feature with several filters to help find certain compounds faster. From the fluids package screen, click "view" located next to the Component List Selection. Pick a compound present in your system. Find the compound by searching or filtering the list of pre-loaded compounds on the right side of the screen. Click to highlight the desired compound. Repeat for ALL compounds present in the system being modeled.To browse Academia. Skip to main content.
Log In Sign Up. Touhid Islam. Ahaduzzaman Mr. Rajesh Paul Dr. In this project, Crude distillation unit system constituted a furnace, a three phase separator and an atmospheric distillation tower. The atmospheric distillation aims to fraction the crude oil in their products: naphtha, kerosene, gas oil, etc. P a g e iv Acknowledgements First and foremost we would like to thank God because without him none of this would have ever been possible.
We would also love to thank our wonderful parents, friends and benefactors who have wished nothing but the best for us.
We would also like to give special thanks to our teachers who were constantly patient with us as we were doing the project. Date: 6. Crude distillation is the process of separating the hydrocarbons in crude oil based on their boiling point. The crude oil fractioning is very intensive process.
The complexity due to large number of products, side stripper, and pump around made the task of improving energy efficiency into tedious. Page 2 Process Description Distillation of crude oil or petroleum refers to fractioning crude oil into the following cuts: gas, naphtha, JP or kerosene, light and heavy gas oil and atmospheric residue.
Generally, it is used to make the separation in one single column, which operates under a pressure slightly higher than the atmospheric one, possessing side extractions. Nowadays, distillation unit of crude oil is a fractionation single unit, on contrast with a set of units that were the first fractionation units.
The crude oil feed to a fractional distillation tower is heated by flow through pipe arranged within a large furnace. The heating unit is known as a pipe-still furnace, and the heating unit and the fractional distillation tower make up the essential parts of a distillation unit.
The crude oil feed is heated by furnace to a predetermined temperature. The vapor is held under pressure in the pipe-still furnace until it discharges as a foaming stream into the fractional distillation tower.To browse Academia. Skip to main content. Log In Sign Up. Oussama Mourad. In addition, you will learn how to determine properties of these streams by using the Phase Envelope and the Property Table utilities.
Example: By: Eng. The resulting vapor and liquid are to be separated as the two product streams. Neglect the pressure drop inside the condenser. By: Eng. The property package is a collection of methods for calculating the properties of the selected components. The By: Eng. The built-in property packages in HYSYS provide accurate thermodynamic, physical and transport property predictions for hydrocarbon, non-hydrocarbon, petrochemical and chemical fluids.
The database consists of an excess of components and over fitted binary coefficients. If a library component cannot be found within the database, a comprehensive selection of estimation methods is available for creating fully defined hypothetical components.
This is a simple case; you can create your own case study with the same steps. The purpose is to find the LTS Low Temperature Separator temperature at which the hydrocarbon dew point target is met. The incoming gas is cooled in two stages—first by exchange with product Sales Gas in a gas-gas exchanger Gas-Gas and then in a propane chiller Chillerrepresented here by a Cooler operation.
A Balance operation will be used to evaluate the hydrocarbon dew point of the product stream at kPa. The cold stream is then separated in a low-temperature separator LTS. The heating curves are broken into intervals, which then exchange energy individually.
The Weighted method is available only for Counter-Current exchangers. For simple problems where there is no phase change and Cp is relatively constant, this option may be sufficient. Calculate the temperature of LTS feed ………………. Refrigeration is used to cool gas to meet a hydrocarbon dewpoint specification and to produce a marketable liquid.
In this module you will construct, run, analyze and manipulate a propane refrigeration loop simulation. You will convert the completed simulation to a template, making it available to connect to other simulations. Inside the Condenser there is a pressure drop of 30 kPa, and leaves as saturated liquid at 45oC. Finally, the propane passes through a valve to return the pressure of the Evaporator.
Valve pressure drop in kPa. Temperature of the valve outlet in oC.ASPEN is a process simulation software package widely used in industry today. Given a process design and an appropriate selection of thermodynamic models, ASPEN uses mathematical models to predict the performance of the process.
This information can then be used in an iterative fashion to optimize the design. This accurate modeling of thermodynamic properties is particularly important in the separation of non-ideal mixtures, and ASPEN has a large data bases of regressed parameters. ASPEN can handle very complex processes, including multiple-column separation systems, chemical reactors, distillation of chemically reactive compounds, and even electrolyte solutions like mineral acids and sodium hydroxide solutions.
ASPEN does not design the process. It takes a design that the user supplies and simulates the performance of the process specified in that design. Therefore, a solid understanding of the underlying chemical engineering principles is required to supply reasonable values of input parameters and to evaluate the suitability of the results obtained.
This information could come from an approximate method, such as the McCabe-Thiele approach, general modeling of the T-x-y behavior, or residue curve maps.
ASPEN cannot tell you how many stages to use for a given separation. You must set the number of stages and see what type of separation results. Some preliminary or 'back of the envelope' calculations are generally recommended.
MSU has a variety of Aspen packages for different simulations. Briefly, here are the programs and capabilities:. Aspen Adsim - Fixed bed adsorption for pressure swing adsorption, etc. Aspen Chromatography - Fixed bed adsorption, simulated moving bed chromatography. Runs independent of Aspen Plus.
Aspen Custom Modeler - A utility to permit the creation of user unit operations. Aspen Dynamics - Unsteady-state simulator. Aspen Plus - Steady-state process simulator.
Modeling a Distillation Tower in HYSYS
Aspen Properties - Modeling of properties and phase equilibria. Incorporated into most other components, though it can be run as a stand-alone subset. All of the phase equilibria and mixture property methods discussed on this site are accessible in either Aspen Plus or Aspen Properties. Aspen Polymers - Modeling of polymerization reactors and polymer thermodynamics.
Distillation Of Water/ethanol In Hysys
This package is available within Aspen Plus or Aspen Properties rather than via an external menu. BatchSep - Batch distillations. Runs independently of Aspen Plus. Normally undergraduate student projects will involve Aspen Plus or Aspen Properties. To start either of these packages, be sure to look for the corresponding User Interface on the start menu. This document is intended to be an overview.
ASPEN has extensive online help. They do not respond to student requests. Work through your instructor and TA for getting answers to your questions. Most common tasks are covered.
When you are prompted to connect to the engine license configure the window as shown, and click OK. To demonstrate how to build a process simulation using ASPEN, we will develop a distillation column for separation of ethanol and water.
The first step in developing a simulation is to develop the process flow diagram PFDwhich consists of the unit operations blocks and streams that feed and connect the blocks. The blocks are listed by category at the bottom of the main window columns, reactors, etc.Initial Setup: 1.
Select Benzene and Toluene for the components. Use the Peng-Robinson Fluid Package. Setting up the Distillation Column: 1. Since this is a simple distillation case, 3 process streams are needed. Place 3 material streams for the feed, the distillate, and the bottoms, and 2 energy streams for the re- boiler and condenser.
In order to make the simulation easy to follow, rename the material streams to feed, distillate, and bottoms. Rename the energy streams to condenser energy, and reboiler energy.
Now a distillation column should be placed. Click on the Distillation Column button in the Simulation Toolbar, and then place it on the simulation window. Now the column is ready to be hooked up to the process and energy streams. Hook up the streams to their appropriate locations.
Now the type of condenser must be specified. HYSYS simulates 3 different types of condensers; a partial, full reflux, and total. Select a total condenser. The next step is to specify the pressures of Distillation column. There are no pressure drops in the condenser and the whole process is run at In the next step, HYSYS prompts for temperature estimates for the top stage, condenser, and re-boiler.
Since these are optional fields, they can be ignored and HYSYS will calculate them when the simulation is run. Clicking done will bring up a window displaying all of the data and options of the distillation column.
In order to achieve the ultra pure distillate stream that is needed, it has been estimated that the column needs 23 trays with the feed entering at tray 7.
HYSYS sets the default number of trays at 10 with the feed entering at tray 5, so 13 trays need to be added and the location of the feed needs to be changed. Specifications of the Feed Stream: After completing the steps above, the Distillation column should be fully specified for most simple distillation cases.
To complete and run the simulation, the feed stream needs to be specified. Double click on the Feed stream. This will open its specification menu.To browse Academia. Skip to main content. Log In Sign Up. It contains mostly those pages that have web links. Use the bookmarks to the left to go to a specific page. Hanyak, Jr. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted in any form or by any means—electronic, mechanical, photo- copying, recording, scanning or otherwise—without the prior written permission of the Publisher, except as permitted under Section or of the United States Copyright Act.
Request to the Publisher for permission should be sent to the address below. Michael E. About the Author Michael E. He received his B. Fromhe worked as a senior chemical engineer at Air Products, Inc.
His teaching and research interests included computer-aided engineering and design, instructional design, pedagogical software tools, and the electronic classroom. With undergraduate and M.
The HYSYS manual is a self-paced instructional document that teaches students how to use effectively a process simulator. With grants from the Air Products Foundation, the General Electric Fund, and the National Science Foundation, Professor Hanyak provided leadership with groups of engineering faculty in pioneering the electronic classroom and active learning in the chemical engineering department and the engineering college at Bucknell University.
As an outreach sincehe and his colleagues have annually presented summer workshops at Bucknell Univeristy on active learning, cooperative learning, and problem-based learning to nearly engineering faculty from the U. InProfessor Hanyak served on the original committee that formulated the Writing Program at Bucknell University. He has integrated teamwork, writing, oral communication, and professionalism in the freshman course on stoichiometry, the junior unit operations laboratory, and the two senior design courses, using a fictitious consultant company, the Bison Engineering and Evaluation Firm BEEF, Inc.
He has authored two BEEF company handbooks to support this integration. As department chairman fromProfessor Hanyak supervised the migration to the first outcome-based format for the successful ABET accreditation inautomated the course scheduling process, and spearheaded the electronic assessment of courses in the Chemical Engineering Department. For his love of teaching and non-traditional research in support of that teaching, he received the Lindback Award for Distinguished Teaching from Bucknell University in This semester-long, problem-based learning activity is intended to be a student-based independent study, with about two-hour support provided once a week by a student teaching assistant to answer any questions.
Your feedback is welcomed in order to improve the next version of this instructional manual. Please direct your feedback to the email address hanyak bucknell. It can also be used as a refresher for chemical engineering seniors in their process engineering design course. Chapter 1 provides an overview of the problem assignment to make styrene monomer from methanol and toluene. Chapter 2 presents ten tutorials to introduce the student to the HYSYS simulation software—tutorial conventions, HYSYS interface, simulation file creation, heater operation, conversion reactor, process flow diagram PDF manipulation tools, Gibbs equilibrium reactor, plug flow reactor, printing capabilities, and spreadsheet programming.
The first six of these tutorials can be completed in a two-week period for the introductory chemical engineering course. The other four are intended for the senior-level design course. These five assignments can be completed over a three-week period. These seven assignments can be completed over a seven-week period.
The HYSYS manual also contains fourteen appendices in support of the four chapters for the steady- state simulation of a continuous process represented by a process flow diagram PFD. Appendix B provides an overview of the steady-state simulation modules for the material and energy balances of some standard unit operations that are detailed in the next ten appendices. Appendix B also provides the conceptual and mathematical models for a process stream divider, often called a TEE.
Appendix N contains the economic model and its HYSYS spreadsheet to determine the net profit for the styrene monomer flowsheet. Finally, Appendix N contains the bibliography for the preface, four chapters, and thirteen appendices.