摘要
在富氧条件下以2.0%Ru/Al2O3和2.0%Ru/AC（AC为活性炭）为催化剂,在固定床反应装置上研究了甲醇、氨、甲苯的催化氧化活性及反应动力学.结果表明,Ru/Al2O3对3种反应物的催化活性比Ru/AC高,3种反应物的反应活性顺序为甲醇〉氨〉甲苯,其去除率随反应物浓度的增加呈先增大后减小的趋势.反应的活化能（Ea）测定结果为甲醇〈氨〈甲苯.比表面积检测（BET）和透射电镜（TEM）结果显示,Ru/Al2O3与Ru/AC的孔体积（0.54 mL/g）近似相等,而其孔径分别为9.3和2.3 nm;在大孔径的氧化铝上Ru以极细的粒径（〈3 nm）形成高度分散体系,在活性炭上Ru则以较大颗粒（4～10 nm）位于活性炭表面,Ru的粒径细化及形成高分散体系可能是Ru/Al2O3的催化活性高于Ru/AC的主要原因.
Catalytic oxidation of methanol,ammonia and toluene with 2.0% Ru/Al2O3 and 2.0% Ru/AC（AC=active carbon） catalysts on a fixed-bed reactor in excess oxygen was studied.The activity test results showed that Ru/Al2O3 has a higher activity than Ru/AC.The three kinds of reactants showed the catalytic activity principle as methanol〉ammonia〉toluene.The conversion of the reactants rose with the increasing of concentration and then dropped with it.The active energy（Ea） of the reaction showed the order as methanol〈ammonia〈toluene.BET and TEM results indicate the pore volume value of Ru/Al2O3 was same as that of Ru/AC（0.54 （mL/g））;however,the pore diameters were very distinct from each other,which were 9.3 nm and 2.3 nm for Ru/Al2O3and Ru/AC respectively.Ru was highly dispersed on the alumina support with very small size（less than 3 nm）;however,the Ru located on the surface of the active carbon was 4-10 nm.The main reason that Ru/Al2O3 was more active than Ru/AC may be caused by the smaller size and higher dispersion of Ru on the supports.
出处
《环境科学研究》
EI
CAS
CSCD
北大核心
2009年第9期1079-1082,共4页
Research of Environmental Sciences
基金
云南省教育厅基金项目(6Z0055D)
国家自然科学基金项目(20863009)
关键词
催化燃烧
甲醇
氨
甲苯
钌
氧化铝
活性碳
catalytic combustion
methanol
ammonia
toluene
ruthenium
alumina
active carbon
