Vapor-Liquid Equilibrium of Benzene and Toluene
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Questions and Answers

What is the thermodynamic model used in the simulation for generating VLE data?

  • Soave-Redlich-Kwong model
  • Peng-Robinson model
  • Ideal model (correct)
  • UNIFAC model
  • Which property package is selected for the simulation in this experiment?

  • Raoult’s law (correct)
  • Redlich-Kwong law
  • Virial equation
  • Ideal gas law
  • What is the first step in starting the DWSIM simulation for VLE data generation?

  • Select components from different databases
  • Set the pressure to 2 atm
  • Choose the desired system of units
  • Click on 'New steady state simulation' (correct)
  • What is the pressure setting used to generate the Txy diagram in the provided data?

    <p>1 atm</p> Signup and view all the answers

    Which property package is specified for creating the Txy diagram using Raoult’s Law?

    <p>PP_1</p> Signup and view all the answers

    Which components are specified for the VLE data generation?

    <p>Benzene and Toluene</p> Signup and view all the answers

    When generating the T-x-y data for the Water-Ethanol system, which methods should be compared?

    <p>Ideal and NRTL or Peng Robinson</p> Signup and view all the answers

    What is required in the flowsheeting section to generate binary VLE?

    <p>At least one material stream</p> Signup and view all the answers

    What is the primary purpose of generating P-x-y data for the benzene-toluene system at 120 °C?

    <p>To understand vapor-liquid equilibrium</p> Signup and view all the answers

    What is the x-axis basis used for the Txy diagrams described in the content?

    <p>Mole fraction</p> Signup and view all the answers

    Study Notes

    Experiment Objective

    • Generate Vapor-Liquid Equilibrium (VLE) data for a binary system composed of Benzene and Toluene at 1 atm pressure.

    Experiment Setup

    • Utilizes DWSIM simulation software (version 5.1 - Classic UI).
    • Uses Raoult's Law as the thermodynamic model, assuming an ideal system.

    Procedure

    • Step 1: Create a new steady-state simulation in DWSIM.
    • Step 2: Select Benzene and Toluene as the components from the ChemSep database.
    • Step 3: Add Raoult’s Law as the property package and a default flash algorithm.
    • Step 4: Select desired unit system.
    • Step 5: Open the flowsheeting section.
    • Step 6: Add a material stream object to the flowsheet.
    • Step 7: Attach a "Binary Envelope" utility to the material stream.
    • Step 8: Open the Binary Envelope window:
      • For Txy Plot: Set Compound 1 to Benzene, Compound 2 to Toluene, Envelope Type to Txy, Txy Diagram Options to VLE, X axis basis to Mole fraction, Pressure to 1 atm, and Property Package to PP_1 (Raoult’s Law).
      • For xy (VLE) Plot: Set Compounds, Envelope Type, Txy Diagram Options, X axis basis, Pressure, and Property Package as before, but change Envelope Type to (T)xy.

    Self-Learning Exercises

    • Generate P-x-y data for Benzene-Toluene at 120°C.
    • Generate T-x-y data at 5 bar and compare results with data at 1 bar.
    • Generate T-x-y data for Water-Ethanol at 1 bar using both "Ideal" and "NRTL" or "Peng Robinson" methods, then compare results.

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    Description

    Explore the Vapor-Liquid Equilibrium (VLE) data generation for a binary system of Benzene and Toluene using DWSIM software. This quiz covers the experimental setup, procedure, and thermodynamic models involved in the simulation process at 1 atm pressure.

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