1. Department of Process Technology─Kinetics and Catalysis, SINTEF Industry, P.O. Box 4760, Sluppen, N-7465 Trondheim, Norway
2. CSIRO Energy, 71 Normanby Road, Clayton North, Victoria 3169, Australia
3. Department of Chemical Engineering, Norwegian University of Science and Technology (NTNU), N-7491 Trondheim, Norway