1. Chemical Process and Energy Resources Institute; Centre for Research and Technology Hellas; P.O. Box 60361 Thermi 57001 Thessaloniki Greece
2. CNRS, LRGP, UMR 7274, and Université de Lorraine; LRGP; UMR 7274 F-54001 Nancy France
3. Department of Chemical Engineering; Aristotle University of Thessaloniki; P.O. Box 472 54124 Thessaloniki Greece