1. Laboratory of Adsorption and Catalysis, Department of Chemistry, University of Antwerpen (U.I.A.), Universiteitsplein 1, 2610 Wilrijk, Belgium, Fortum Oil and Gas Oy, Oil, Research and Development, POB 110, 00048 Fortum, Keilaranta 6, Espoo, Finland, Department of Inorganic Chemistry and Catalysis, Debye Institute, University of Utrecht, Sorbonnelaan 16, PO Box 80083, 2508 TB Utrecht, The Netherlands, and Centrum voor Oppervlaktechemie en Katalyse, Departement Interfasechemie, K.U. Leuven, Kardinaal...