Adiabatic Flash Calculations using the Peng Robinson Equation of State
Author
Housam Binous
Title
Adiabatic Flash Calculations using the Peng Robinson Equation of State
Description
The notebook solves Example 7.5 page 285 presented in the excellent book by Henley and Seader, Equilibrium-Stage Separation Operations in Chemical Engineering, Wiley, 1981. The notebook shows how to perform easily adiabatic flash calculations using the Peng Robinson Equation of State. This approach, based on the built-in Mathematica function FindRoot, is easier than the iterative technique of Henley and Seader.
Category
Educational Materials
Keywords
URL
http://www.notebookarchive.org/2018-10-10qovwh/
DOI
https://notebookarchive.org/2018-10-10qovwh
Date Added
2018-10-02
Date Last Modified
2018-10-02
File Size
20.24 kilobytes
Supplements
Rights
Redistribution rights reserved
This notebook has not been updated since 2006. 
Adiabatic Flash Calculations using the
Peng Robinson Equation of State
Author's Data: Housam Binous
Department of Chemical Engineering
National Institute of Applied Sciences and Technology
Tunis, TUNISIA
Email: binoushousam@yahoo.com
Adiabatic Flash Calculations using the
Peng Robinson Equation of State
Author's Data: Housam Binous
Department of Chemical Engineering
National Institute of Applied Sciences and Technology
Tunis, TUNISIA
Email: binoushousam@yahoo.com
Peng Robinson Equation of State
Author's Data: Housam Binous
Department of Chemical Engineering
National Institute of Applied Sciences and Technology
Tunis, TUNISIA
Email: binoushousam@yahoo.com
Acknowledgement :
This problem was presented in the excellent book by Henley and Seader, Equilibrium-Stage Separation Operations in Chemical Engineering, Wiley, 1981.
This problem was presented in the excellent book by Henley and Seader, Equilibrium-Stage Separation Operations in Chemical Engineering, Wiley, 1981.
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Reduced Pressure and Temperature
Equilibrium constants using the ϕ-ϕ methode and the Peng Robinson Equation of State. Binary interaction parameters for the Peng Robinson EOS were taken from HYSYS 3.2.
Critical Pressure and Temperature and acentric factor for Hydrogen, Methane, Benzene and Toluene
Feed Pressure and temperature are 485 psia and 100°F. Feed is composed of 0.41% Hydrogen, 5.71% Methane, 70.97% Benzene and 22.91% Toluene. Feed pressure is decreased adiabatically from 485 psia to 165 psia.
Adiabatic Flash Calculations using Enthalpy balance with Q=0.
Results of the iterative technique of Henley and Seader:
Equilibrium liquid mole fractions: { 0.000413642, 0.0280863, 0.734359, 0.237141 } ,
Equilibrium vapor mole fractions: { 0.108406, 0.869565, 0.0197101, 0.00231884 } ,
Only 3.44% of the feed is vaporized.
All these results compare very well with the approach using FindRoot presented here.
Equilibrium liquid mole fractions: { 0.000413642, 0.0280863, 0.734359, 0.237141 } ,
Equilibrium vapor mole fractions: { 0.108406, 0.869565, 0.0197101, 0.00231884 } ,
Only 3.44% of the feed is vaporized.
All these results compare very well with the approach using FindRoot presented here.
Cite this as: Housam Binous, "Adiabatic Flash Calculations using the Peng Robinson Equation of State" from the Notebook Archive (2006), https://notebookarchive.org/2018-10-10qovwh
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