[1] ENEA, Portici Res Ctr, I-80055 Naples, Italy
[2] CNR, Ist Tecnol Avanzate Energia Nicola Giordano, ITAE, Salita S Lucia Contesse 5, I-98126 Messina, Italy
[3] Clemson Univ, Mat Sci & Engn, Clemson, SC 29634 USA
[4] CNR, Inst Membrane Technol, I-87036 Arcavacata Di Rende, Italy