As always, it was a great experience, thanks to all students and my tutors, Yang and Jack. The two had taken part in previous years’s course and had stayed 3 months in Germany for the “Chemical Process Development” course. They did a terrific job!

At the end, the students presented many interesting talks:

Development of Cubic equations of state, vdW to SRK and PR |

Experimental determination of pure component vapor pressures |

Chemical theory for vapor dimerization
Present the calculation and effect of dimerization on pure component density and heat of vaporization. Describe the calculation of the binary VLE of acetic acid and water. |

Calculation of enthalpy changes of fluids using the equation of state and latent heat approach |

Parameter a of the SRK equation of state from high precision vapor pressure equations for water and benzene |

Measurement of vapor-liquid equilibrium data using dynamic and static method
(gave exp. Chapter) |

Derivation of the Wilson equation |

Derivation of the UNIQUAC equation
See Prausnitz, Molecular Thermodynamics of Fluid Phase Equilibria |

Measurement of activity coefficients at infinite dilution using gas chromatographic retention times |

Regression of NRTL BIP from experimental VLE using Excel |

Regression of NRTL BIP from experimental VLE (TDE) in Aspen Plus |

VLE calculation using EOS (quadratic mixing rule) for the mixture N2-CH4 |

Verify gE-model BIPs using DDB |

Verifying gE-model BIPs in Aspen Plus using data from TDE |

LLE phase stability, second derivative of gE with respect to composition and K-factor method |

Criteria for azeotropic behavior |

Eutectic SLE calculation |

Process balancing in residual curve or distillation line plots |

Calculation of VLE using mod. UNIFAC |

Extractive distillation and solvent screening via headspace-GC |

Solvents for azeotropic distillation
To the homogeneous azeotropic mixture water – pyridine, a non-polar solvent is added to generate a lower boiling azeotrope that allows to distill the more polar component water over the top of the column, where it is separated in a decanter. Explain the Effect of solvent vapor pressure and polarity on the behavior of the azeotropic mixture. |

Sodium acetate / acetic acid buffer system simulation for pH control
Calculate the amount of sodium acetate and acetic acid in a 0.1M sodium acetate buffer and demonstrate it by adding various amounts of HCl and NaOH (sensitivity study) |

Solubility of salts in Aspen Plus as function of temperature |

Graphical design of the QVF-process to recover acetic acid from dilute aqueous solutions |

Acid gas (CO2, H2S) scrubbing using mono-, di- or triethanolamine solutions.
Explain the modeling of the gas sweetening process using Aspen Plus. What is the difference between the three amines? |

Relaxation method for the calculation of chemical equilibria |

Extracting drinking water from salt water using a fatty acid
Explain the process and the underlying thermodynamic and molecular basis |