1. VTT Technical Research Centre of Finland Ltd., P.O. Box 1000, FI-02044 Espoo, Finland
2. Department of Chemical Engineering (ENTEG), University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
3. BTG Biomass Technology Group BV, P.O. Box 835, 7500 AV Enschede, The Netherlands