%0 Journal Article %T 负载型Mn基催化剂催化氧化甲苯的研究
Study on the Catalytic Oxidation of Toluene by Mn-Based Supported Catalysts %A 杨仲余 %A 潘华 %A 毛益萍 %A 王晟康 %A 张鼎盛 %A 王莉 %J Hans Journal of Chemical Engineering and Technology %P 305-312 %@ 2161-8852 %D 2019 %I Hans Publishing %R 10.12677/HJCET.2019.94043 %X 采用溶胶–凝胶法制备了CeO₂和TiO₂载体，通过浸渍法制备了Mn/CeO₂和Mn/TiO₂催化剂，通过催化活性评价和催化表征等方法考察了Mn/CeO₂和Mn/TiO₂等催化剂氧化甲苯的催化行为。研究表明：催化剂活性为Mn/CeO₂ > Mn/TiO₂ > TiO₂ > CeO₂。Mn/CeO₂催化剂具有最低的起燃温度(T₅₀ = 180℃)，其在215℃下甲苯的转化效率可稳定在80%。Mn/CeO₂和Mn/TiO₂等催化剂的活性与催化剂的物化结构、催化剂的活性组分有关。相较于Mn/TiO₂，Mn/CeO₂具有较大的孔体积和比表面积。Mn/CeO₂和Mn/TiO₂催化剂的活性组分皆主要为Mn₃O₄。相较于Mn/TiO₂，Mn/CeO₂催化剂表面具有较高含量的Mn²⁺和表面氧(O_surf)。
CeO₂ and TiO₂ supports were synthetized by sol-gel method, Mn/CeO₂ and Mn/TiO₂ catalysts were prepared by impregnation method. The catalytic behaviors of Mn/CeO₂ and Mn/TiO₂ for oxidation of toluene were investigated by catalytic activity evaluation and catalyst characterization. The results show that the activities of catalysts decrease in order of Mn/CeO₂ > Mn/TiO₂ > TiO₂ > CeO₂. Mn/CeO₂ catalyst has the lowest light-off temperature (T₅₀ = 180？C); the conversion of toluene can reach 80% at 215？C. The activity of Mn/CeO₂, Mn/CeO₂ and other catalysts is related to the physical and chemical structure and the active component of the catalyst. Compared with Mn/TiO₂, Mn/CeO₂ has higher pore volume and specific surface area compared with Mn/CeO₂. The active component of both Mn/CeO₂ and Mn/TiO₂ is Mn₃O₄. Compared with Mn/TiO₂, Mn/CeO₂ catalyst has a higher concentration of Mn²⁺ and O_surf. %K 甲苯，催化氧化，锰基催化剂
Toluene %K Catalytic Oxidation %K Mn-Based Supported Catalysts %U http://www.hanspub.org/journal/PaperInformation.aspx?PaperID=31173