Study on Cycling Performance of Coal/Straw Blending Chemical Looping Combustion with Oxygen Carrier Fe₂O₃

Multi-cycle reduction/oxidization characteristics of oxygen carrier Fe₂O₃ were studied during the chemical looping combustion (CLC) of coal-straw-Fe₂O₃ mixtures in different blending ratios, with focus on the influence of ash content brought in by solid fuel on the reaction rate of chemical looping, and on the improvement effect of straw on the chemical looping reaction. Results show that the chemical looping reaction can be improved by increasing the mass ratio of oxygen carrier Fe₂O₃, when the initial reaction temperature is lowered; ash content plays a negative role in influencing the cycleability of the oxygen carrier Fe₂O₃; the addition of straw helps to improve the CLC property of coal, which results in both improved combustion reaction rate and increased regeneration reaction rate of the oxygen carrier.