Research progress on oxygen carrier attrition and anti-attrition methods in chemical looping combustion
The large-scale use of fossil fuels has led to excessive CO2 emissions,and the resulting global climate problems have received widespread attention.Chemical looping combustion improves the traditional combustion method by using a circulating oxygen carrier to provide active oxygen to the fuel,avoiding the dilution of N2 to the flue gas,reducing the cost of CO2 capture and has the advantage of internal separation of CO2,which has a great potential for development in the field of CO2 capture.Oxygen carrier is the core of chemical looping combustion technology,which plays the dual role of transferring heat and releasing lattice oxygen,but the oxygen carrier faces the problems of large attrition rate and short lifetime,which seriously affect the economy of chemical looping combustion technology.The apparent phenomena and intrinsic mechanism of oxygen carrier attrition were reviewed,and chemical attrition is found to be the main factor of oxygen carrier attrition.The methods of assessing and predicting the attrition of oxygen carrier as well as the methods of improving the abrasion resistance of oxygen carrier were summarized,and the future research of oxygen carrier was also prospected.
chemical looping combustionCO2 captureoxygen carrierattrition
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