1. Institute of Chemical Engineering Ulm University Albert-Einstein-Allee 11 D-89069 Ulm Germany
2. Institute for Chemical Technology and Polymer Chemistry Karlsruhe Institute of Technology Engesserstraße 20 76131 Karlsruhe Germany
3. Institute of Catalysis Research and Technology Karlsruhe Institute of Technology Hermann-von-Helmholtz Platz 1 76344 Eggenstein-Leopoldshafen Germany