1. Friedrich-Alexander University Erlangen-Nuremberg, Chair for Separation Science & Technology, D-91058 Erlangen, Germany
2. Previous address: Max Planck Institute, Magdeburg,
Germany
3. Max Planck Institute for Dynamics of Complex Technical Systems, Process Synthesis & Process Dynamics, D-39106 Magdeburg, Germany
4. Otto von Guericke University, Chair for
Automation/Modelling, D-39106 Magdeburg, Germany