1. Foundation for Research and Technology Hellas, Institute of Chemical Engineering and High-Temperature Processes, (FORTH/ICE-HT) Stadiou Str, Platani, P.O. Box 1414, GR 26504 Patras, Greece, and Department of Chemical Engineering, 159 Goessmann Laboratory, University of Massachusetts Amherst, Amherst, Massachusetts 01003-3110, and Department of Chemical Engineering and Center for Catalytic Science and Technology (CCST), University of Delaware, Newark, Delaware 19716-3110