汽油车燃用乙醇汽油的颗粒物与醛酮排放特性

Particles,Aldehydes and Ketones Emitted from a Gasoline Vehicle Fueled with E10 Ethanol Gasoline

依据国家第4阶段排放标准(GB 18352.3—2005),使用电子低压冲击仪和高效液相色谱仪、在底盘测功机上对汽油车燃用汽油及E10乙醇汽油的颗粒物及醛酮排放进行了对比研究.结果表明:车辆燃用E10乙醇汽油后,颗粒物排放的数密度、表面积浓度和体积浓度比燃用汽油时的低,但醛酮类污染物总量比燃用汽油时高,其中乙醛的增幅最大,是汽油车的5倍左右;车辆燃用汽油和乙醇汽油所排放的颗粒物中,PM2.5所占比例分别为99.98%和99.99%,PM0.1的比例为别为95.79%和95.33%.

According to the stage 4 emission standard of GB 18352.3--2005, comparative studies on particles, aldehydes and ketones emitted from a gasoline vehicle fueled respectively with E10 ethanol gasoline and gasoline were conducted. Particles were measured by electrical low pressure impactor （ELPI）. Aldehydes and ketones were measured through high performance liquid chromatography （HPLC）. The results show that particle number, area and volume concentrations for E10 are all lower than those for gasoline. Aldehydes and ketones for E10 are higher than those for gasoline, with acetaldehyde increasing five times. When gasoline was fueled 99.98% of particles belong to PM2.5 and 95.79% of particles are PM0.1. When El0 was fueled, ratios are 99.99% and 95.33% respectively.