Comparative Evaluation of the Performance of Coal Combustion in 0.5 and 50 kWth Chemical Looping Combustion Units with Ilmenite, Redmud or Iron Ore as Oxygen Carrier

In this work, an overview of the operational experience in ICB-CSIC is presented. Results obtained in 0.5 kWth and 50 kWth CLC units burning different coals with ilmenite, redmud or iron ore are compiled and critically compared. Insights were obtained in order to achieve high CO2 capture and combustion efficiency values. Eventually, the use of ring-type internals in the fuel reactor of the 50 kWth CLC unit was accomplished to promote the gas-solid contact, thus increasing the combustion efficiency.