1. Centre for Research and Technology Hellas, Chemical Process and Energy Resources Institute, 6th km Charilaou-Thermi Road, Thessaloniki 570 01, Greece
2. Department of Chemistry, Aristotle University of Thessaloniki, University Campus, Thessaloniki 541 24, Greece
3. Technology Center, Bourne Boulevard, Johnson Matthey Process Technologies, Savannah, Georgia 31408, United States