在STA409PC热重分析仪上对Cu/Si氧载体的脱氧-吸氧性能加以研究,并利用BET、SEM和XRD对所制备氧载体的比表面积、表面形貌和物相组成进行分析.结果表明,在N2氛围中,当温度高于850℃时Cu/Si氧载体脱氧反应进入快速反应阶段;氧载体在空气氛围中再生的快速反应温度高于400℃;氧载体脱氧和吸氧的反应速率随颗粒直径的减小及气体流量的增大,而增大但变化不明显,而随反应温度的升高,氧载体脱氧和吸氧反应速率都会急剧增大;23次循环实验中,氧载体脱氧-吸氧性能稳定,经循环之后的氧载体,颗粒表面变得光滑,空隙率增加,但机械强度降低.物相分析结果表明氧载体脱氧后的成分主要有Cu2O和SiO2,吸氧后的成分主要有CuO和SiO2,氧载体的制备方法和循环性能有很好的稳定性和适应性.
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