Research on Factors Influencing the Performance of Diesel Oxidation Catalysts
Based on engine bench-scale Catalytic converter performance tests,it was studied that the tempera-ture rise of DOC is not obvious when the engine is in normal operation,and the outlet temperature is affected by the airspeed and the inlet temperature of DOC.The effects of Space Velocity and exhaust temperature of Doc In-let on the conversion efficiency of NO,CO and hydrocarbon were studied.The results showed that the conver-sion efficiency of 1#DOC at 250℃-450℃was better than that at 250℃-450℃at 175℃-350℃,conversion efficiency increased with increasing temperature,while at 375℃-450℃,conversion efficiency decreased with in-creasing temperature.The higher the airspeed,the better the conversion efficiency at low temperature(175℃-275℃),and the lower the airspeed,the better the conversion efficiency at 300℃-450℃.The CO conversion efficiency of different types of DOC was more than 90%at each temperature.The THC conversion efficiency of 1#Doc was 90%at 300℃-400℃,and that of 2#Doc was 80%at 275℃-400℃.
Temperature rise characteristicsConversion efficiencyDOCTemperature dischargeSpace ve-locity
万方数据
维普
