加料方式对铈锆复合氧化物性能的影响
Effect of Feeding Methods on Properties of Cerium-Zirconium Composite Oxides
谭程校 1高彬 1陈贤娜 1黄英强 1万国江1
作者信息
- 1. 江门市科恒实业股份有限公司,广东 江门 529040
- 折叠
摘要
采用共沉淀法,通过改变加料方式制备了镧钇掺杂的铈锆复合氧化物(Ce0.25Zr0.60La0.05Y0.10On).通过XRD、N2吸附-脱附、粒度分析和化学吸附等手段对其进行了表征,以考察共沉淀法的加料方式对铈锆复合氧化物性能的影响.结果表明共沉淀反应时采用的加料方式能影响铈锆复合氧化物的晶粒大小,从而导致孔分布、耐高温老化性能和储氧性能的差异.其中反加方法制备的铈锆复合氧化物,具有较高的比表面积和耐高温老化性能,在1100℃/4 h老化条件下,比表面积达到 30.97 m2/g.
Abstract
Using co-precipitation method,the lanthanum and yttrium doped cerium-zirconium composite oxides(Ce0.25Zr0.60La0.05Y0.10On)were prepared by changing the feeding methods.It was characterized by XRD,N2 physical adsorption-desorption,particle size analysis and chemical adsorption to study the effect of co-precipitation feeding methods on the properties of cerium-zirconium composite oxides.The results showed that the feeding methods used in the co-precipitation reaction can affect the crystal size of the cerium-zirconium composite oxides,which leads to the difference of pore distribution,high temperature aging resistance and oxygen storage performance.The cerium-zirconium composite oxides prepared by the reverse feeding method has high specific surface area and high temperature aging resistance,and the specific surface area reaches 30.97 m2/g under the aging condition of 1100℃for 4 h.
关键词
铈锆复合氧化物/加料方式/晶粒尺寸/耐高温老化/共沉淀Key words
cerium-zirconium composite oxides/feeding method/crystal size/high temperature aging resistance/co-precipitation引用本文复制引用
出版年
2024
NETL
NSTL
万方数据