1. Thermal Process Engineering, University of Duisburg−Essen, Lotharstraße 1, D-47057 Duisburg, Germany
2. BASF Catalysts Germany GmbH, Große Drakenburger Straße 93-97, D-31582 Nienburg, Germany
3. Institute of Energy and Environmental Technology, IUTA e. V., Bliersheimer Straße 60, D-47229 Duisburg, Germany