Chemical-Looping Combustion of Solid Fuels – Operational Experiences in 100 kW Dual Circulating Fluidized Bed System

Results from the first year of operation of a 100 kW chemical-looping combustor for solid fuels arepresented. Gas measurements showed the presence of unconverted gas from the fuel reactor. Withbituminous coal the gas conversion was up to 84%, and significantly higher with low-volatile fuel andchar. The gas conversion was strongly dependent on solids inventory in the fuel reactor. A CO2 captureup to 98-99% was reached.The unit worked well and operation was stable. The operation shows the viability of this technology,which has unique potential for breakthrough in cost and energy penalty of CO2 capture