In the R&D consortium on biomass co-firing, ECN and KEMA, with the assistance of DElft University of Technology, have joined forces to address the biomass co-firing R&D needs. The Dutch power generation sector is closely involved to ensure that the R&D activities are well targeted to market needs and to facilitate the implementation and exploitation of the results. The work is financially supported by SenterNovem through the Dutch Long-Term Energy Research Strategy programme (EOSLT).