Commissioning of a 0.8Â MWth CFBC for oxy-fuel combustion

► A 0.8 MWth CFBC had been retrofitted for oxy-fuel CFB combustion research. ► Continuous tests (∼96 h) had been carried out proving the system reliability. ► CO2 concentration reached 85-90% during the entire oxy-fuel firing period. ► Transition from air firing mode to oxy-fuel firing mode was fast and smooth. ► The facility is ready to be used in the development of oxy-fuel CFBC technology.