摘要
采用溶胶凝胶法制备出一系列的含锌尖晶石型ZnM_2O_4(M=Cr,Al,Fe)催化剂并测试其对二氯甲烷催化燃烧性能,并对催化剂进行了XRD,H_2-TPR,NH_3-TPD和XPS等表征.制备出的催化剂都具有较高的反应活性,其中ZnCr_2O_4尖晶石活性最佳,其T50为277℃.表征结果表明,催化剂的性能受到表面酸性和氧化还原性的协同作用.ZnCr_2O_4尖晶石催化剂具有较小的中等酸强度的表面酸性和最佳的低温还原性能,因此反应性能最佳.
A series of zinc spinel type ZnM2O4(M=Cr,Al,Fe)catalysts were prepared by a sol-gel method,which were characterized by XRD,H2-TPR,NH3-TPD and XPS.techniques and tested for catalytic combustion performance of dichloromethylene.It was found that the prepared catalysts were active for the reaction,with the Zn-Cr2O4 oxide possessing the highest activity.The characterization results showed that the catalytic performance of the catalyst was governed synergistically by surface acidity and reducibility.The ZnCr2O4 spinel catalyst had low sur-face acidity of moderate acid strength and the best low temperature reducibility,and therefore the best performance.
作者
张婷婷
陈家喜
刘景弟
鲁继青
ZHANG ting-ting;CHEN Jia-xi;LIU Jing-di;Lu Ji-qing(Key Laboratory of the Ministry of Education for Advanced Catalysis Materials,Institue of Physical Chemistry,Zhejiang Normal University,Jinhua 321004,China)
出处
《分子催化》
EI
CAS
CSCD
北大核心
2016年第5期454-461,共8页
Journal of Molecular Catalysis(China)
基金
国家自然科学基金(21173195)
关键词
溶胶凝胶法
尖晶石型催化剂
二氯甲烷
催化燃烧
sol-gel method
spinel type catalysts
dichloromethylene
catalytic combustion
