1. Department of Mechanical Engineering
2. University of Western Macedonia
3. GR-50100 Kozani, Greece
4. Chemical Process & Energy Resources Institute
5. Centre for Research & Technology Hellas
6. Thessaloniki, Greece
7. Department of Chemical Engineering
8. Aristotle University of Thessaloniki
9. Instituto Nacional del Carbon
10. 33080 Oviedo, Spain
11. School of Production Engineering and Management
12. Technical University of Crete
13. GR-73100 Chania, Greece