低比例甲醇/柴油混合燃料羰基排放的试验研究

Experimental research of carbonyl emissions on diesel fuels blended with small methanol addition

在一台涡轮增压柴油机上,使用自制的尾气非常规成份采样装置,采集增压柴油机最大扭矩转速燃用柴油（M0）、甲醇/柴油混合燃料（M5、M10、M15）的尾气,用高效色谱法对尾气排放中的羰基成份进行定量分析。研究表明,燃用柴油和甲醇/柴油混合燃料,柴油机尾气中都检测出醛酮非常规排放物,其中甲醛和乙醛是主要的羰基排放物,所占比例占总羰基排放物的52.7%～65.3%,C1～C3的小分子醛酮含量多于高分子醛酮。柴油机的羰基排放浓度随负荷上升明显下降,随甲醇掺烧比例的增加而上升。

Using a sample device for collection of unregulated emissions,exhaust gases from a turbocharged diesel engine fueled with diesel（M0）and methanol-diesel blends（M5,M10,M15）at max torque speed were sampled respectively.High performance liquid chromatography was used in the quantitative analysis of exhaust gases.The results show that unregulated emissions from the engine fueled with four types of the fuels are discovered.Formaldehyde and acetaldehyde are the main unregulated pollutants and account for52.7to 65.3percent of carbonyl pollutants.C1~C3carbonyl compounds are more than other macromolecule carbonyls.Methanol addition of blends rising,the concentration of total carbonyl emissions is increasing.