CAJ | 학술논문

利用气相色谱-氦离子化快速检测方法,研究了一台多点电喷汽油机分别燃用乙醇汽油混合燃料(乙醇的体积分数分别为0%、10%、20%和85%,记为E0、E10、E20和E85)时的非常规醇醛排放特性及其催化转化特性.研究结果表明:与汽油机相比,E10和E20混合燃料发动机的甲醛、乙醛和乙醇排放随乙醇掺混比的增加而增加,而E85混合燃料发动机的甲醛、乙醛排放增幅略小,约为E0发动机的1.6倍和2.4倍,乙醇排放却大幅增加,约为E10混合燃料发动机的35倍;随负荷的增加,乙醛排放整体呈增加的趋势,E10和E20混合燃料发动机的乙醇排放降低,而E85混合燃料发动机的乙醇排放却增加;普通的三效催化器对乙醛、乙醇排放的转化效率均在75%以上,但对甲醛的转化效果不佳,对E20和E85混合燃料发动机甲醛排放的转化效率低于30%.
이용기상색보-양리자화쾌속검측방법,연구료일태다점전분기유궤분별연용을순기유혼합연료(을순적체적분수분별위0%、10%、20%화85%,기위E0、E10、E20화E85)시적비상규순철배방특성급기최화전화특성.연구결과표명:여기유궤상비,E10화E20혼합연료발동궤적갑철、을철화을순배방수을순참혼비적증가이증가,이E85혼합연료발동궤적갑철、을철배방증폭략소,약위E0발동궤적1.6배화2.4배,을순배방각대폭증가,약위E10혼합연료발동궤적35배;수부하적증가,을철배방정체정증가적추세,E10화E20혼합연료발동궤적을순배방강저,이E85혼합연료발동궤적을순배방각증가;보통적삼효최화기대을철、을순배방적전화효솔균재75%이상,단대갑철적전화효과불가,대E20화E85혼합연료발동궤갑철배방적전화효솔저우30%.
Four typical ethanol-gasoline blends,EO,EIO,E20 and E85,containing 0%,10 %,20%and 85%of ethanol in volume respectively were prepared to investigate the effects of ethanol/gasoline blends(gasohol)on engine unregulated emissions.A multiple-point injection gasoline engine was applied in the experiment and the unregulated emissions were detected by a gas chromatography with a pulsed discharge helium ionization detector.The performance of a three way catalytic converter(TWC)was examined.The experimental results show that the emissions of formaldehyde,acetaldehyde and ethanol increased with the increase of ethanol ratio in E10 and E20.The emission of formaldehyde and acetaldehyde from the engine with E85 increased slightly,about 1.6 and 2.4 times as large as that with E0,respectively,while the emission of ethanol was about 35 times as large as that with EIO.The emission of acetaldehyde increased with theload,and the ethanol emission from the engine with E10 or E20 decreased but that with E85 in creased slightly with the increase in the load.The conversion efficiency of aldehyde and ethanol emissions with TWC was above 75%while the conversion efficiency of formaldehyde emission from the engine with E20 or E85 was less than 30%.