摘要
采用固相反应制备了Ni O-La Co O3催化剂,考察了焙烧温度以及Ni含量对催化剂的CO和丙烷氧化活性的影响。用X射线粉末衍射、H2-程序升温还原等技术对催化剂进行了表征。结果表明,在焙烧温度为700-1000℃时,焙烧温度越高,催化剂的丙烷和CO氧化性能越差,其中700℃焙烧后的10Ni O-La Co O3催化剂的效果最好。助剂Ni能有效提高La Co O3催化剂的丙烷和CO氧化性能,其中Ni含量为7.5%的7.5Ni O-La Co O3催化剂氧化性能最佳。研究发现催化剂的CO和丙烷氧化活性与催化剂中氧活动性具有相关性。
A series of NiO-LaCoO3were synthesized by solid-phase reaction method. The effects of calcination temperature and the content of Ni in catalyst on the carbon monoxide and propane oxidation performance of the as-synthesized catalysts were investigated. These catalysts were characterized by X-ray diffraction （XRD）,hydrogen temperature-programmed reduction （H2-TPR） and other techniques. The results indicate that lower calcination temperature is beneficial for better catalytic performance. Among all catalysts,10NiO-LaCoO3calcinated at 700℃ exhibited the best catalytic performance. The addition of Ni into the structure of LaCoO3can significantly enhance the carbon monoxide and propane oxidation activity,and the optimal NiO loading is 7.5%. It was also found that the catalytic performance of catalysts is highly associated with oxygen mobility in catalysts.
出处
《化工进展》
EI
CAS
CSCD
北大核心
2015年第9期3345-3348,3362,共5页
Chemical Industry and Engineering Progress
基金
浙江省大学生新苗人才计划(2013R404042)
浙江省科技厅公益性项目(2013C31049)
