[1] Univ Zaragoza, Chem & Environm Engn Dept, Zaragoza 50018, Spain
[2] Univ Zaragoza, INA, Zaragoza 50018, Spain
[3] Delft Univ Technol, Dept Chem Engn, NL-2628 BL Delft, Netherlands
[4] Univ Cantabria, Chem Engn & Inorgan Chem Dept, E-39005 Santander, Spain