摘要
采用微乳液法将CuO-CeO2负载于FeCrAl整体式载体上,以超声波和热振荡考察了催化剂在载体表面的粘附稳定性,并测试了CuO-CeO2/Al2O3/FeCrAl整体式催化剂对一氧化碳优先氧化反应的催化性能.使用扫描电子显微镜、X射线衍射和X射线光电子能谱等手段对所制备的催化剂进行了表征.结果表明,CuO-CeO2可以以良好的稳定性粘附于FeCrAl载体表面,且以纳米粒子形式在载体表面分布均匀.载体对催化剂的化学状态没有显著影响,制得的整体式催化剂对一氧化碳优先氧化具有较高的催化活性和高选择性,并且有良好的稳定性.
A new technique, the microemulsion method, for depositing CuO-CeO2 on FeCrAl honeycomb supports was described. Adhesion stability of the monolithic catalyst was tested via ultrasonic and thermal shock experiments. The monolithic catalyst was characterized by scanning electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. The results showed that CuO-CeO2 could be loaded on the FeCrAl honeycomb supports with good adhesion stability by the microemulsion method. CuO-CeO2 was in a nanoparticle form and was homogeneously dispersed on the surface of the supports. The supports had no obvious influence on the chemical states of the catalyst. The CuO-CeO2/Al2O3/FeCrAl monolithic catalyst was used in the preferential oxidation of CO in hydrogen-rich gases and exhibited good activity, high selectivity, and good stability.
出处
《催化学报》
SCIE
CAS
CSCD
北大核心
2008年第5期436-440,共5页
基金
国家高技术研究发展计划(863计划
2006AA05Z115
2007AA05Z104)
关键词
氧化铜
氧化铈
整体式催化剂
微乳液
一氧化碳
优先氧化
copper oxide
ceria
monolith catalyst
microemulsion
carbon monoxide
preferential oxidation
