铜基载氧体制备参数对释氧和吸氧性能的影响  

Effects of Preparation Parameters on Reduction and Oxidation Reactivity of Cu-based Oxygen Carriers

作　　者：王坤[1] 于庆波[1] 段文军[1] 董亮[1] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110819

出　　处：《东北大学学报（自然科学版）》2014年第6期819-823,共5页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(51274066);国家科技支撑计划项目(2013BAA03B03);东北大学研究生科研创新项目(120602004)

摘　　要：在STA409PC热重分析仪上,以机械混合法和溶胶凝胶法制备的铜基载氧体为研究对象,研究了惰性载体种类、惰性载体添加比例、不同煅烧温度及煅烧时间等制备参数对铜基载氧体释氧和吸氧性能的影响.实验结果表明:三种类型载氧体释氧性能强弱顺序为Cu/Zr>Cu/Ti>Cu/Si,吸氧性能相差不大;随惰性载体添加比例的增加,载氧体的释氧和吸氧性能增强;随煅烧温度的升高,载氧体的释氧性能降低,而吸氧性能变化不大;煅烧时间的改变对载氧体的释氧-吸氧性能没有明显的影响;不同制备方法制备的载氧体,Cu/Zr和Cu/Si溶胶凝胶法好于机械混合法,Cu/Ti机械混合法好于溶胶凝胶法.Cu-based oxygen carders with different binders （ ZrO2, TiO2, SiO2 ） were prepared by mechanical mixing method and sol-gel method. The effects of preparation parameters （different binders, mass ratio of binder, sintering temperature and time） on the reduction and oxidation reactivity of oxygen carriers were investigated by thermogravimetric analyzer. The results showed that the reactivity of the three types oxygen carriers increases in the order of Cu/Zr 〉 Cu/Ti 〉 Cu/ Si. The oxygen carriers have the better reduction and oxidation reactivity with the higher content ratio of binders. The reduction reactivity decreases with the increasing of sintering temperature, while the effect of sintering temperature on the oxidation reactivity is little. The effects of sintering time both on reduction and oxidation reactivity are little, too. For Cu/Zr and Cu/Ti oxygen carriers, the sol-gel method is better than mechanical mixing. However, for Cu/Si oxygen carrier, the mechanical mixing method is better than sol-gel.

关 键 词：化学链制氧 铜基载氧体 制备参数 释氧性能 吸氧性能 

分 类 号：TB34[一般工业技术—材料科学与工程]