1. Van‘t Hoff Institute for Molecular Sciences, University of Amsterdam, P.O. Box 94157, 1090GD Amsterdam, The Netherlands
2. Retired from SABIC Limburg B.V., Geleen Technology Center, Urmonderbaan 22, 6167 RD Geleen, P.O. Box 319, 6160AH Geleen, The Netherlands
3. SABIC Limburg B.V., Geleen Technology Center, Urmonderbaan 22, 6167 RD Geleen, P.O. Box 319, 6160AH Geleen, The Netherlands
4. Department of Chemical Engineering, Queen’s University, Dupuis Hall, Room 201, Kingston, Ontario K7L 3N6, Canada