Affiliation: | a Chemical Process Engineering Research Institute and Department of Chemical Engineering, Aristotle University of Thessaloniki, P.O. Box 361, 570 01 Thermi, Thessaloniki, Greece b Ruhr-Universität Bochum, Lehrstuhl für Technische Chemie, P.O. Box 102 148, D-44 780, Bochum, Germany |