1. Department of Chemical Engineering, University of Naples Federico II, P. le Tecchio 80, 80125 Naples, Italy
2. Institute of Researches on Combustion-CNR, P. le Tecchio 80, 80125 Naples, Italy
3. Department of Material Science and Chemical Engineering, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Turin, Italy