铜基载氧体制备参数对释氧和吸氧性能的影响

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.

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

Cu based oxygen carriers with different binders(ZrO2，TiO2，SiO2)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.