Webinar: Modelling distillation process dynamics in gPROMS ProcessBuilder


Typically, distillation columns are designed and operated based on time-invariant (steady state) analysis. In reality however, distillation processes are continuously subject to disturbances, caused by variations in feedstock, changes in product requirements, the availability of utilities, and so on.

Dynamic modelling is a key technology for optimising column design and operation. It can be used to understand the effects of feed and product quality changes, periodic feed upsets and abnormal operation, and then to design and tune control schemes capable of dealing with such disturbances.

Accurate quantification of column transients allows engineers to minimise the effects on off-spec product, energy requirements and purity giveaway, in order to maximise process economics.

This webinar provides an overview of recent developments in PSE's equation-based gPROMS ProcessBuilder flowsheet modelling package that now make dynamic simulation of distillation columns easier than ever before.

Topics covered

In this webinar you will learn about:

  • Key considerations for modelling of distillation column dynamics
  • Dynamic distillation of gPROMS ProcessBuilder
    • How to create and execute a simple dynamic distillation simulation
  • Case studies:
    • Dynamic simulation of a coupled two-column azeotropic ethanol dehydration system
    • Dynamic simulation and optimisation of a coupled two-column alcohol separation system
    • Dynamic analysis of a refinery crude distillation unit, including full pre-heat train and VDU integration


Mariana Marques Mariana Marques is an Applications Engineer at PSE. She has an M.Sc. in Chemical Engineering from Instituto Superior Técnico in Portugal.

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