摘要
以高锰酸钾和富马酸为原料,采用溶胶凝胶法合成了二氧化锰(Mn O2)催化剂,通过X射线衍射分析(XRD)、扫描电镜(SEM)、N2吸附-脱附以及氢气程序升温还原(H2-TPR)等技术对制备材料的结构和还原性能进行了表征,并考察材料的焙烧温度对其催化燃烧甲苯性能的影响.结果表明,焙烧温度为450℃的产物为纯相的α-Mn O2,催化剂呈现颗粒状形貌并具有较大的比表面积(60.56 m2·g-1),低温下易还原,具有较好的甲苯催化燃烧性能,完全燃烧温度T99为210℃.
α-MnO_2 catalysts are prepared by sol-gel method with KMn O4 and fumaric acid as raw materials. The catalysts are characterized by X-ray diffraction（ XRD）,scanning electron microscope（ SEM）,N_2adsorption-desorption measurement and H_2temperature-programmed reduction（ H_2-TPR）. The effect of calcination temperature on the catalytic activity for toluene combustion is investigated. The results indicate that when the calcination temperature is 450 ℃,the obtained α-MnO_2 nanoparticles possess high specific BET surface area（ 60. 56 m^2·g^（-1）） and good low-temperature reducibility. Results show that the catalysts have excellent performance in the toluene combustion. The total conversion temperature of toluene is 210 ℃.
出处
《广东工业大学学报》
CAS
2016年第2期85-90,共6页
Journal of Guangdong University of Technology
基金
国家自然科学基金资助项目(21306026)
广东省科技计划项目(2012A030600006)
关键词
溶胶凝胶法
二氧化锰
甲苯
催化燃烧
焙烧温度
sol-gel method
manganese oxide
toluene
catalytic combustion
calcination temperature
