CAJ | 학술논문

采用共沉淀法制备了载体TiO_2-Si_2(TS),用浸渍法制备了催化剂CuSO_4-CeO_2/TS,考察了组分配比、焙烧温度等制备条件和反应温度、NO进口浓度、O_2含量、空速等操作条件对其催化氧化NO活性的影响及其抗H_2O和SO_2毒化的能力,对载体和催化剂分别进行了分析.结果表明,在最佳条件下制备的催化剂,在反应温度350℃、进口NO浓度500×10~(-6)(w)及O_2浓度8%(w)、空速10000 h~(-1)条件下,NO转化率可达67.5%,能满足NO_x高效吸收的要求.但因NO催化氧化过程的反应温度和O_2含量均较高,其抗SO_2和H_2O毒化能力低于NO催化还原过程.
채용공침정법제비료재체TiO_2-Si_2(TS),용침지법제비료최화제CuSO_4-CeO_2/TS,고찰료조분배비、배소온도등제비조건화반응온도、NO진구농도、O_2함량、공속등조작조건대기최화양화NO활성적영향급기항H_2O화SO_2독화적능력,대재체화최화제분별진행료분석.결과표명,재최가조건하제비적최화제,재반응온도350℃、진구NO농도500×10~(-6)(w)급O_2농도8%(w)、공속10000 h~(-1)조건하,NO전화솔가체67.5%,능만족NO_x고효흡수적요구.단인NO최화양화과정적반응온도화O_2함량균교고,기항SO_2화H_2O독화능력저우NO최화환원과정.
CuSO_4-CeO_2/TS catalyst impregnated on TiO_2-SiO_2 (TS) support was prepared by coprecipitation method. The effects of loading, calcination temperature, volume fractions of NO and O_2, and space velocity on CuSO_4-CeO_2/TS catalytic oxidation of nitric oxide were studied, and the resistance to poisoning of H_2O and SO_2 was also investigated. The support and catalysts were characterized by BET, XRD and FT-IR analysis. The results showed that the optimum catalyst could obtain the oxidation rate (NO_2/NO_x) about 67.5%, when the volumetric fraction of NO was 500×10~(-6), O_2 8% and space velocity 10000 h~(-1) at 350℃ of reaction temperature, which could meet the condition of the highest absorption efficiency of NO_x. But because of the higher reaction temperature and O_2 content in the NO catalytic oxidation, the resistance to poisoning of H_2O and SO_2 was worse than that used in selective catalytic reduction process.