NiO-LaCoO3催化剂的丙烷和CO氧化性能  

Catalytic oxidation of carbon monoxide and propane on NiO-LaCoO_3

作　　者：章轩语[1] 陈忠[1] 周颖[1] 邢丰[1] 胡庚申[1] 罗孟飞[1] 

机构地区：[1]浙江师范大学化学与生命科学学院,浙江省固体表面反应化学重点实验室,浙江金华321004

出　　处：《化工进展》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)

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.

关 键 词：催化 催化剂载体 LACOO3 镍 钙钛矿型催化剂 

分 类 号：O643.3[理学—物理化学]