1. Department of Engineering Science and Mathematics; Division of Energy Science; Luleå University of Technology; 971 87 Luleå Sweden
2. Technical Chemistry, Department of Chemistry; Chemical-Biological Centre; Umeå University; SE-90871 Umeå Sweden
3. Industrial Chemistry & Reaction Engineering, John Gadolin Process Chemistry Centre; Åbo Akademi University; Biskopsgatan 8 Fl-20500 Åbo-Turku Finland