Characteristics of biomass chemical looping gasification with CoFe2O4 as oxygen carrier

The evaluation of biomass chemical looping gasification (CLG) was conducted via a thermogravimetric analyzer and a fixed bed reactor using CoFe2O4 as oxygen carrier. The effects of mass ratio (oxygen carrier to biomass), steam content and reaction temperature on the CLG reactivity of biomass were explored and the recyclability of oxygen carrier was also studied. The oxygen carriers of fresh and reacted were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The TGA results indicate that CoFe2O4 can provide lattice oxygen to effectively improve the biomass gasification. The optimal performance can be achieved when the mass ratio, steam content and temperature are 0.8, 50%, and 900℃, respectively. After 5 cycles of reaction, high quality syngas can still be obtained. The oxygen carrier can be recycled and there is no obvious sintering and agglomeration. © All Right Reserved.