甲苯
催化作用
化学
草酸
醋酸酐
锰
无机化学
苯
醋酸
臭氧
马来酸酐
硝酸
空间速度
核化学
有机化学
选择性
聚合物
共聚物
作者
Ebrahim Rezaei,Jafar Soltan
标识
DOI:10.1016/j.cej.2012.06.016
摘要
Ozonation of toluene catalyzed by manganese oxides supported on γ-alumina and siliceous MCM-41 was studied at temperatures from 22 to 100 °C. Nitrate and acetate precursors of manganese were used to compare structure and activity of dispersed manganese oxides on γ-alumina and MCM-41. Catalysts were characterized by X-ray diffraction, Raman spectroscopy, BET and ICP-MS. Catalysts became deactivated at room temperature due to accumulation of carbon species. A minimum reaction temperature of 65 °C was required to achieve steady state oxidation of toluene with ozone. Alumina supported catalysts prepared from the nitrate and acetate precursors had comparable activity. MCM-41 supported catalyst resulted in lower toluene and ozone conversion in comparison to γ-alumina catalysts above 40 °C. CO and CO2 were the main reaction products while oxalic acid, acetic acid, benzene and maleic anhydride were also detected as the minor reaction byproducts.
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