CuCoOx／TiO2催化氧化NO性能研究

采用浸渍法制备了CuCoOx／TiO2催化剂，考察了焙烧温度、反应温度、氧含量、NO浓度和空间速度对催化剂催化氧化NO性能的影响，并考察了催化剂的抗硫抗水性能。XRD、TPR和BET分析表明，350℃焙烧的催化剂具有CuCo2O4尖晶石结构，比表面积大，对NO的氧化效果好。在空速为5000h^-1，NO进口浓度500mg／m^3，含氧量10％的条件下，反应温度300℃时NO转化率可达79．5％，250℃时NO转化率接近50％。该催化剂具有良好的单独抗SO2、抗H2O毒化性能，H2O和SO2同时存在时很快失活。该催化剂可用于不同时含H2O和SO2的含NO气体催化氧化后再吸收处理。

Performance of CuCoOx/TiO2 for catalytic oxidation of nitric oxide

A series of catalysts of CuCoOx support on TiO2 were prepared for NO selective catalytic oxidaion （SCO） by impregnation. Effects of different CuCo2O4 calcination temperatures and reaction temperatures, O： and NO concentrations, space velocity on NO conversion were also investigated. It was found that the catalyst at the calcination temperature of 350 ℃ shown the highest activity. The results of XRD, TPR analysis and BET testing shown that the catalyst calcined at 350℃ has CuCo2O4spinel, and its surface area is much larger than that calcined at other temperatures. The results shown that this catalyst yielded 79.5% NO conversion at 300℃ , and nearly 50% at 250℃ when the volume fraction of feeding gas is NO 500 mg/m3, O2 10% , space velocity 5 000 h-1 In addition, only SO2 or H2O have little effects on NO oxidization, but in the presence of both SO2 and H2O, the catalyst is poisoned quickly. The CuCo2O4/TiOEcatalyst can be used for NO oxidization in the absence of either SO： or H2O.