1. Chair of Process Dynamics and Operation, Sekr. KWT-9; Berlin Institute of Technology; Str. des 17 Juni 135, D-10623; Berlin; Germany
2. Dept. of Chemical Engineering; Carnegie Mellon University; 5000 Forbes Avenue; Pittsburgh; PA; 15213
3. School of Design, Engineering and Technology; University of Bradford; Richmond Road; Bradford; BD7 1DP; U.K.