Chemical looping combustion (CLC) is a novel combustion technology with the capability for segregation of exhaust products (i.e.carbon dioxide/H2O and nitrogen/oxygen).If water condensation is applied to the exhaust products of a CLC system,a concentrated stream of CO2 is possible,and thus sequestration of CO2 becomes a possibility.CLC uses a metal oxide as an oxygen carrier,which transfers oxygen from the air to the fuel,thus avoiding the direct contact between fuel and air.The feasibility of a CLC system depends on the selection of an appropriate oxygen carrier.Cu-based oxygen carriers are good oxygen carriers due to high reactivity,environmental friendliness,and favorable thermodynamics.Based on the initial oxygen loading capability tests,the dry impregnation methods received additional investigation.The characterizations of the carriers were evaluated by using thermogravimetric analyzer (TGA),X-ray Diffraction (XRD),scanning electron microscope (SEM) and surface area analyzer.TGA is an excellent fixed-bed technique to evaluate (1) the content of metal (Cu) in/on the supporting material (Al2O3),(2) the preparation methods for oxygen carriers; (3) the morphology of oxygen carriers under the controlled furnace temperature.The major issue found in this study was the attrition loss of copper of the ICSET oxygen carrier.Unlike the TGA tests,where the oxygen carrier was kept in a static condition for the testing period,the continuous operations of the 10KW CLC pilot exposed the oxygen carrier to high circulation rates,which caused collisions between the oxygen carrier particles with themselves,the reactors and the cyclones resulting in the breakage of oxygen carrier particles.The oxygen carrier was subjected to evaluation in a 10 kW dual-fluidized bed chemical looping facility and the carrier showed a good performance.