Evaluation of Cu-based oxygen carrier for chemical looping air separation in a fixed-bed reactor

摘要: Abstract Chemical looping air separation (CLAS) is a novel technology to separate oxygen from air. In CLAS process, carrier releases in steam atmosphere and the reduced regenerated atmosphere. The performance of essential technology. this study, feasibility CuO was evaluated by thermodynamics. Steam not involved any reaction. production achieved decomposition Cu2O optional reduction temperatures should be 850–1050 °C. order inhibit agglomeration copper oxides, carriers were prepared with 60 wt.% SiO2, TiO2, ZrO2 MgAl2O4 as support materials. release absorb rates four determined under 950, 975 1000 °C oxidation 800, 850, 900 °C fixed-bed reactor. Both include quick slow reaction stages. rate increases decreases investigated temperature increasing. macro-kinetic models established based on reactivity data. Binders have great effect kinetic parameters. Cu4Mg6 has highest rates. stability multi-cycles test. keep stable each cycle. chemical physical characteristics reacted also measured. phases are only oxides binder. surface area becomes larger after cycles. There no obvious observed