Cu-Mn／SiO2催化氧化NO性能研究

Performance of Cu-Mn/SiO_2 in catalytic oxidation of nitrogen monoxide

制备并考察了Cu-Mn/SiO2催化氧化NO的性能,研究了各操作条件对NO催化氧化效率的影响,在NO体积分数1 000×10-6、O210%,空速5 000 h-1,240℃时,NO的氧化率高于60%(此时最适宜吸收处理),300℃时,氧化率可达到70%,接近平衡值。Cu-Mn/SiO2有良好的单独抗H2O、SO2毒化性能,H2O和SO2同时存在时,很快失活。Cu-Mn/SiO2可用于不同时含H2O和SO2的含NO气体氧化吸收处理。

Cu-Mn/SiO2 catalysts were prepared for selective catalytic oxidation of NO, the effects of reacting conditions on the conversation of NO were invested systematically, when feeding 1 000 × 10^-6 NO, 10% O2 under 5 000 h^-1 space velocity, the oxidizing rate of NO is over 60% （it is very suitable for NOx adsorbing） at 240 ℃ and 70% （near thermodynamic equilibrium value） at 300 ℃. Only SO2 or H2O have little affection on NO oxidization, but at the presence of both SO2 and H2O, the catalyst is poisoned quickly. The Cu-Mn/SiO2 catalysts can be used for NO oxidization at the absence of both SO2 and H2O.