节点文献
二氧化锰纳米颗粒的制备及其催化氧化甲苯的性能
Preparation of manganese dioxide nanoparticles and their catalytic performance in toluene oxidation
【摘要】 以高锰酸钾为锰源,在表面活性剂十六烷基三甲基溴化铵(CTAB)的作用下,加入正丁醇作为还原剂制备纳米二氧化锰催化剂。利用扫描电子显微镜、X射线衍射分析、氮气等温吸附-脱附以及氢气程序升温还原(H2-TPR)等技术对制备的纳米二氧化锰进行分析,结果表明,其粒径为(10~20) nm,主要成分是二氧化锰,比表面积达到91.84 m2·g-1。同时该催化剂具有良好的催化氧化甲苯的性能,在甲苯浓度1 000×10-6、空速60 000 h-1条件下,261℃时可以达到50%以上分解率,275℃可以几乎完全分解(99%)。
【Abstract】 Using potassium permanganate as manganese source, cetyltrimethylammonium bromide(CTAB) as surfactant, n-butanol as reducing agent, manganese dioxide nanoparticles were prepared.Scanning electron microscopy(SEM),X-ray diffraction analysis(XRD),nitrogen adsorption-desorption isotherms and hydrogen temperature programmed reduction(H2-TPR) were used to analyze the prepared manganese dioxide.The results show that the catalyst has a particle size of(10-20) nm, main ingredient is MnO2 and the specific surface area is 91.84 m2·g-1.The catalyst has good catalytic performance in the oxidation of toluene.At a toluene concentration of 1 000×10-6 and a space velocity of 60 000 h-1,the decomposition conversion is over 50% at 261 ℃ and 99% at 275 ℃.
【Key words】 catalytic chemistry; surfactants; manganese dioxide; catalytic oxidation; toluene; decomposition temperature;
- 【文献出处】 工业催化 ,Industrial Catalysis , 编辑部邮箱 ,2023年12期
- 【分类号】TQ426;TQ241.12;TB383.1
- 【下载频次】152