Experiment - Generation of VLE Data of Binary Component System PDF
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Summary
This document provides a procedure for generating vapor-liquid equilibrium (VLE) data for a binary component system (benzene-toluene) using a software (DWSIM). It also includes exercises for generating VLE data for other systems like water-ethanol. The document focuses on chemical engineering principles and practices.
Full Transcript
Experiment No. 03 Generation of VLE Data of Binary Component System Objective Generate vapour-liquid equilibrium data (VLE) for a binary component system Data Fluid components: Benzene - Toluene Pressure = 1 atm Thermodynamic model: Ideal DWSIM Block Material Stream Procedure 1. S...
Experiment No. 03 Generation of VLE Data of Binary Component System Objective Generate vapour-liquid equilibrium data (VLE) for a binary component system Data Fluid components: Benzene - Toluene Pressure = 1 atm Thermodynamic model: Ideal DWSIM Block Material Stream Procedure 1. Start a new DWSIM simulation (DWSIM VER 5.1 - CLASSIC UI). Click on “New steady state simulation” as a template for new simulation 2. The simulation configuration window will be opened. The specification page will appear. Select the components required for the simulation, namely “Benzene” and “Toluene”. Ensure, components are added from same property database. In this illustration, both components are added from “ChemSep” database. 3. Select and add the property package (Raoult’s law) and click “Next”. Add the default flash algorithm for the simulation. Click “Next”. 4. Choose the desired system of units for the simulation and click “Next”. 5. The flowsheeting section will be opened. 6. To generate binary VLE, at least one material stream is required in the flowsheeting section. Hence, click on material stream object at the object palette and drag it to the flowsheet section. 7. Click the “material stream” to open its specification window. Next to the object name, you will find an icon, click it to attach utility and under utility add an “Binary Envelope” as shown in the figure below 9|Page 8. A new window opens. Enlarge it. Use the different pull down menus available in the window to generate the Txy and VLE plot for Benzene and Toluene at given pressure. Provide settings as shown below and click at “Calculate” to see the Txy plot Settings to generate Txy at given pressure Compound 1 Benzene Compound 2 Toluene Envelope type Txy Txy diagram options VLE X axis basis Mole fraction Pressure 1 atm Property package PP_1 (Raoult’s Law) Settings to generate xy (VLE plot) at given pressure Compound 1 Benzene Compound 2 Toluene 10 | P a g e Envelope type (T)xy Txy diagram VLE options X axis basis Mole fraction Pressure 1 atm Property package PP_1 (Raoult’s Law) Self-Learning Exercises 1. Generate P-x-y data at T = 120 oC for benzene toluene system. 2. Generate T-x-y at P = 5 bar and compare your results with 1 bar to make suitable observations 3. Generate the T-x-y data for Water-Ethanol system at 1 bar using “Ideal” and “NRTL” or “Peng Robinson” method. What differences are observed? 11 | P a g e
