NiO-LaCoO3催化剂的丙烷和CO氧化性能.pdfVIP

学兔兔 化 工 进 展 2015年第34卷第9期 CHEMICAL INDUSTRY AND ENG1NEERING PROGRESS ·3345· NiO．LaCoO3催化剂的丙烷和CO氧化性能 章轩语，陈忠，周颖，邢丰，胡庚申，罗孟飞 (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) 摘要：采用固相反应制备了NiO．LaCoO3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700C焙烧后的10NiO-LaCoO3催化剂的效果最 好。助剂Ni能有效提高LaCoO3催化剂的丙烷和CO氧化性能，其中Ni含量为7．5％的7．5NiO-LaCoO3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。 关键词：催化；催化剂载体；LaCoO3；镍；钙钛矿型催化剂 中图分类号：O 643I3 文献标志码：A 文章编号：1000—6613(2015)09—3345—05 DoI：10．16085~．issn．1000—6613．2015．09．021 Catalytic oxidation of carbon monoxide and propane on NiO—LaCoO3 ZHANGXuanyu，CHENZhong，ZHOUYing，XING Feng，HUGengshen，LUO Mengfei (College ofChemistry and Life Science，Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces，Zh~iang Normal University，Jinhua 321004，Zhejiang，China) Abstract：A series of NiO．LaCoO were 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 beneficia1 for better catalytic performance．Among all catalysts，1ONi0．LaCoO calcinated at 700℃ exhibited the best catalytic performance．The addition of Ni into the structure of LaCoO can significantly enhance the carbon monoxide and propane oxidation activity，and the optimal NiO loading iS 7．5％．It was also found t