1. Schuit Institute of Catalysis, Laboratory for Inorganic Chemistry and Catalysis, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, and ZeoSys GmbH (Zeolithsysteme), Haus 6.1, Rudower Chaussee 5, 12484 Berlin-Adlershof, Germany