# Distillation research and models

I have worked on distillation (both batch and continuous) since about 1980 -- on design (steady-state), modelling, dynamics and control. If you do not know much about distillation, then the following paper dealing with the steady-state behavior and design of continuous distillation may be useful:
• I.J. Halvorsen and S. Skogestad, ``Distillation Theory'', Encyclopedia of Separation Science. In: D. Wilson (Editor-in-chief), Academic Press, 2000.
The following paper covers control of distillation columns:
In addition, the following paper provides an introduction to dynamics and control of distillation columns:
The following paper covers the literature up to about 1991 very well:

## Matlab files

A lot of our work has been related to the dynamics and control of "Column A" (41 stages;, relative volatility 1.5; 99% purity; liquid flow dynamics; constant pressure):
• colamod.m The basic dynamic Matlab model for column A (more details below).
In addition, there are some other column models:
• dist.m A very simple model with 3 stages + total condenser.
• dist3.m A model for closed operation (F=0, D=0, B=0) (binary mixture, two vessels).
• multicomA.m (ORIGINAL VERSION, 2003). A model for a column with any number of components (extension of colamod.m to NC components - still ideal mixture)
• colamod_nonideal.m A model for 3 components and nonideal Wilson or Uniquac liquid activity (extension of colamod.m to nonideal mixture)
• OLD: dist5.m A model for a column with varying reboiler and condenser holdup, but constant stage holdup. With PI-controllers in top. Works for closed operation (F=0)
• OLD: colap.m A first attempt at a MATLAB model for a column with pressure variations.
• Models with varying pressure and neglected vapor holdup written by Hilde Engelien
• fenske.f Steady-state model of binary distillation column based on assumption of constant molar flows and constant relative volatility (Fortran program).
• linemcmodel.mat Linear model of 5x5 column of Lundstrom in mutools format. See distillation mailbox for more details.
• Petlyuk column Dynamic model of Petlyuk column made by Ivar Halvorsen

## Speedup files

• Speedup files of B. Wittgens on multivessel batch distillation and continous distillation
• Speedup and Matlab files of E.H. Hilmen on batch distillation of nonideal mixtures
• Speedup file of P. Lundstrom of 5x5 distillation model with varying pressure and vapor holdup included