1. Department of Chemical Engineering, KTH Royal Institute of Technology, Teknikringen 42, SE-10044 Stockholm, Sweden
2. Department of Chemical Engineering, University of Rome Sapienza, via Eudossiana 18, 00184 Rome, Italy
3. Haldor Topsoe A/S, Haldor Topsøes Allé 1, DK-2800 Kongens Lyngby, Denmark