1. School of Chemical Engineering, Department of Materials Science and Engineering, National Technical University of Athens, 9 Heroon Polytechniou Street, Zografou Campus, GR 15780 Athens, Greece; Institute of Chemical Engineering and High-Temperature Chemical Processes, ICE/HT-FORTH, GR 26500 Patras, Greece; and Department of Chemical Engineering, University of Patras, GR 26504 Patras, Greece