Kinetics study on Ni and Cu based oxides for chemical-looping combustion

Chemical-looping combustion(CLC) is a combustion technology with inherent separation of the greenhouse gas carbon dioxide.Oxygen carriers with good activity for chemical reaction are very important for its development.A comparative study on chemical kinetics and cycle reaction ability of two kinds of oxygen carriers(Ni/NiAl2O4,Cu/Al2O3) obtained by mechanical mixing is performed.The results show that the apparent activation energy of oxygen carriers by adding Al2O3 is changed and the chemical reaction performance is enhanced.By XRD measurement,the results show that the cycle reaction ability has been improved greatly.