1. Ph.D. Student and Research Scientist, Karlsruhe Institute of Technology, Engler-Bunte-Institut Division of Combustion Technology, Kaiserstraße 12, 76131 Karlsruhe, Germany.
2. Research Scientist, Chemical Engineering Dept., Ege Univ., 35100 Bornova/Izmir, Turkey.
3. Professor, Chemical Engineering Dept., Ege Univ., 35100 Bornova/Izmir, Turkey (corresponding author).