1. Department of Chemistry, Norwegian University of Science and Technology, NO 7491 Trondheim, Norway, Institut Carnot de Bourgogne, UMR-5209 CNRS-Université de Bourgogne, 9 av. A. Savary, 21000 Dijon, France, and Department of Process and Energy, Technical University of Delft, 2628 EV Delft, The Netherlands