NPAC技术降低柴油机NO_x和碳烟排放的试验研究  

Experimental Study on Reducing NOx and Soot Emissions of Diesel Engine Using Non-Thermal Plasma Assisted Catalyst

作　　者：王攀[1] 蔡忆昔[1] 李小华[1] 王军[1] 

机构地区：[1]江苏大学汽车与交通工程学院,镇江212013

出　　处：《内燃机工程》2011年第3期28-31,共4页Chinese Internal Combustion Engine Engineering

基　　金：国家自然科学基金资助项目(50776041);江苏省高校自然科学重大基础研究项目(06KJA47004);江苏大学基金(10JDG054)

摘　　要：利用等体积溶液浸渍法制备一种CeO2-CuO/-γAl2O3负载型催化剂,应用X衍射分析仪(XRD)、电镜扫描仪(SEM)等表面分析技术对催化剂进行了表征,考察了该催化剂的性能。设计了一种低温等离子体(NTP)发生器,并建立了低温等离子体辅助催化(NPAC)试验系统。通过台架试验研究了NPAC技术对柴油机有害排放的作用规律,探索了排放物浓度、流量、滞留时间等因素对有害排放转化效果的影响。研究结果表明:NPAC技术可以有效降低柴油机碳烟排放,NOx排放明显降低;在NPAC作用下,碳烟转化效率最高接近60%。标定转速工况下,CeO2-CuO/-γAl2O3催化剂活性较好,NOx排放转化率最高,在中高负荷工况下,转速越高对应的NOx转化效率越低。A novel CeO2-CuO/γ-Al2O3 support catalyst was prepared by wetness impregnation method and characterized by X-ray diffraction（XRD）,scanning electron microscope（SEM）,to examine its performance.On the basis of the non-thermal plasma（NTP） reactor designed specially the NTP assisted catalyst（NPAC） system was established and used in engine bench test to investigate its mechanism of reducing diesel engine harmful emissions,particularly the effect of pollutant concentration,flow,velocity,etc.on its conversion efficiency.Results show that the soot particles are reduced effectively and NOx emissions are decreased remarkably by NPAC.The highest conversion efficiency of soot is close to 60 %.In rated speed condition,CeO2-CuO/γ-Al2O3 catalyst has high activity and the conversion efficiency of NOx emissions is highest.In medium-and high-load ranges,the higher the speed,correspondingly the lower the conversion efficiency of NOx emission.

关 键 词：内燃机 柴油机 溶液浸渍法 低温等离子体 催化剂 台架试验 

分 类 号：TK421.5[动力工程及工程热物理—动力机械及工程]