1. Laboratory of Inorganic Materials and CatalysisDepartment of Chemical Engineering and ChemistryEindhoven University of Technology P.O. Box 513, 5600 MB Eindhoven The Netherlands
2. Current address: Polymer Technology Group Eindhoven (PTG/e) B.V. P.O. Box 6284 5600 HG Eindhoven The Netherlands
3. Energy TechnologyDepartment of Mechanical EngineeringEindhoven University of Technology P.O. Box 513, 5600 MB Eindhoven The Netherlands