1. Dept. of Chemical Engineering; Centre for Process Systems Engineering (CPSE), Imperial College London; London SW7 2AZ U.K
2. Artie McFerrin Department of Chemical Engineering; Texas A&M University, College Station; TX 77843
3. Institute for Chemical and Bioengineering; ETH Zurich; olfgang-Pauli-Str. 10/HCI F 129, W Zurich CH-8093 Switzerland