1. Energy Engineering, Department of Engineering Sciences and Mathematics, Luleå University of Technology, SE-97187 Luleå, Sweden
2. BEST − Bioenergy and Sustainable Technologies GmbH, Inffeldgasse 21b, AT-8010 Graz, Austria
3. Institute of Chemical and Energy Engineering, BOKU − University of Natural Resources and Life Sciences Vienna, Muthgasse 107/I, 1190 Vienna, Austria