Influence of gas flow uniformity on catalyst light-off characteristics in automotive catalytic converter;
汽车尾气催化转化器内流动均匀性对起燃特性的影响
Under simulated exhaust conditions,the catalytic activity is evaluated by using the light-off temperature(the temperature of 50% conversion simplified as T_(50)) and the temperature of 90% conversion(T_(90)) for the three pollutants CO、HC and NO_x.
在模拟条件下,以起燃温度和气体转化效率90%时的温度为评价指标测定HC、CO及NOx的三效催化活性。
La_(1-x)Ce_xFe_(1-y-n)Co_yRu_nO_3 were prepared by the sol-gel method to study the catalytic activity and evaluated by using the light-off temperature (the temperature of 50% conversion simplified as T_(50)) and the temperature of 90% conversion (T_(90)) under simulated exhaust conditions for the three pollutants CO? HC and NO_X.
为研究Ru改性的铁基钙钛矿体系的催化性能,用溶胶-凝胶法分别制备了不同x、y、n值的La1-xCexFe1-y-nCoyRunO3系列化合物,在模拟条件下,以起燃温度和气体转化效率为90%时的温度为评价指标测定了HC、CO及NOX的三效催化活性。
The results showed that the catalysts containing Ce xZr 1-xO 2 solid solutions have higher conversion as well as lower light-off temperature compared with that containing pure CeO 2.
4 O2 催化剂性能最佳 ,HC、CO、NO的转化率在A/F =14 6时分别为 97 33%、89 5 2 %、10 0 %;新鲜催化剂的起燃温度分别为 186、180、185℃ ,高温处理后起燃温度分别为 2 49、2 41、2 46℃。
Influence of Ce rare-earth on ignition temperature of magnesium alloy;
富铈稀土对镁合金起燃温度的影响
1,the catalyst had the best catalytic activity whose onset ignition temperature was 325 ℃.
6H2O物质的量的增大,其催化活性有些减弱,碳烟起燃温度升高。
The catalyst contained in such device should lower down soot ignition temperature to the values characteristic of diesel exhaust (180～350 ℃).
研究发现 ,以Sn为活性组分的催化剂能显著降低颗粒的起燃温度和扩大燃烧温度范围 ,Cu、K、V的添加能进一步降低起燃温度 ,而燃烧温度范围却稍有所变窄 。
The simulation and experiment method was used together to study the influence factors of the light off characteristics of the catalyst.
利用FIRE仿真软件建立了催化器模型,采用仿真和试验相结合的手段对催化器的起燃特性影响因素进行了研究。
The exhaust gas temperature s rise and variation during EUIII test cycle and its impact on the light-off time,ceramic temperature,dynamic response behavior and emission results were studied.
试验研究了摩托车在EUIII测试循环工况下的排气温度变化,以及对于两种氧传感器起燃时间、陶瓷体温度变化、动态响应特性和排放的影响。
Mathematical model for catalytic converter was constructed to simulate its light-off course with CFD technology based on fluent software platform.
应用CFD技术,采用大型的计算流体力学软件Fluent软件建立催化转化器数学模型,并对其起燃过程进行了数值模拟研究。