CuO/Al_2O_3载氧体的制备和表征  

Preparation and characterization of CuO/Al_2O_3 oxygen carrier

作　　者：程钢[1] 乐清华[1] 史小帅[1] 

机构地区：[1]华东理工大学化工学院,上海200237

出　　处：《现代化工》2016年第1期127-130,132,共5页Modern Chemical Industry

摘　　要：以CuO为载氧体,通过化学链燃烧法进行煤层气脱氧的研究。采用共同沉淀法制备了一系列不同负载量的CuO/Al_2O_3载氧体,并通过TGA、XRD、BET、SEM等分析技术对载氧体进行了表征,考察了不同CuO负载量和氧气体积分数对氧化反应的影响。结果表明:CuO的负载量和氧气体积分数对氧化反应速率有很大影响。当负载量为80%时,CuO/Al_2O_3载氧体具有较高氧化活性和化学链循环稳定性。经过循环20次,还原性能和氧化性能均未见明显降低。在氧气体积分数为5.1%时,氧化反应仍然可以达到80%的转化率。It is a key step to remove oxygen from the coal bed methane for the safe utilization of this resource.Chemical-looping combustion is adopted with Cu O as oxygen carrier. A series of CuO/Al2O3 oxygen carriers with different Cu O loading are prepared by the co-precipitate method and characterized by TGA,XRD,BET and SEM. The effects of Cu O loadings and oxygen volume concentration on oxidation reaction are studied. The results show that the Cu O loadings and the oxygen volume concentration have great influences on the reactivity of oxidation. The oxygen carrier with a Cu O loading of 80% has better activity and redox stability. There is no obvious declination on reductive and oxidizing reactivity after 20 cycles. The oxidation conversion can still be up to 80% with the oxygen volume concentration of 5. 1%.

关 键 词：化学链燃烧 载氧体 氧化反应 

分 类 号：TK16[动力工程及工程热物理—热能工程]