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Separation Design with Shortcut Methods

by Lars von Wedel last modified 2006-07-26 12:15

Designing separation sequences is important to achieve efficient processes. The Shortcut Toolbox and the CAPE-OPEN based Shortcut Unit effectively support you in this task.

Simplify Assessment of Separation Steps

In order to gain qualitative insight into a separation, the tools help you to

  • determine azeotropes,
  • find miscibility gaps,
  • draw residue curve diagrams, and
  • compute mass balances.

These steps are easily applied to mixtures with an arbitrary number of components. The analysis is based on non-ideal property models using existing property data.

Reduce Energy Cost

Based on the rectification body method (RBM) developed at Process Systems Engineering (LPT) at RWTH Aachen University, you can

  • easily determine the feasibility of separation steps,
  • calculate the minimum energy demand, and
  • quickly screen separation alternatives for energy efficient candidates.

Minimize Entrainer Demand

An extension to the distillation shortcut permits the computation of minimum entrainer demand in addition to energy demand for homogeneous extractive distillation.

The RBM Shortcut method

  • No need to specify tray number, feed tray, reflux ratio
  • Based on tight approximation of column profiles (pinch point analysis)
  • Full support of non-ideal behavior

Shortcut Unit Model

Plug our CAPE-OPEN compliant shortcut into your flowsheeting simulator:

  • quickly analyse separation sequences,
  • reuse existing thermodynamics, and
  • include the shortcut within recycles.

Ongoing Developments

Current developments tackle

  • flowsheet optimization,
  • initialization of MINLP optimization problems, and
  • heterogeneous distillation

Contact us to discuss your ideas!


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