地沟油生物柴油碳烟微粒排放及肺沉积表面积研究

在柴油机上分别燃烧纯地沟油生物柴油和纯石化柴油在每一负荷工况下运用颗粒物测试系统NanoMet3研究碳烟微粒的排放及肺沉积表面积。结果表明:各工况下,地沟油生物柴油碳烟微粒数量浓度及质量浓度均小于石化柴油。小负荷时两种燃料的差距不大;大负荷时,地沟油生物柴油碳烟微粒数量浓度及质量浓度远小于石化柴油;但增幅高于石化柴油。地沟油生物柴油碳烟微粒的平均粒径比石化柴油小,其肺沉积表面积小于石化柴油,对人体的危害值低于石化柴油。碳烟微粒肺沉积表面积受到平均粒径和数量浓度的共同作用,其增幅与数量浓度的增幅呈现出相同的变化趋势。

Study on the Characteristics of Soot Particle Emissions and Lung Deposited Surface Area from the Waste Cooking Oil Biodiesel

With the use of the particle testing system NanoMet3, a study on the characteristics of soot particle emissions was carried out on a diesel engine fueled with waste cooking oil biodiesel and pure diesel under every load condition. The results show that under different conditions, waste cooking oil biodiesel soot particle number concentration and mass concentration are less than those of diesel, at low load, the difference of both fuel is not significant. Waste cooking oil biodiesel soot particle number concentration and mass concentration are much less than those of diesel at high load,but the increases of concentrations are higher than those of diesel. The soot particle average diameter and lung deposited surface area of waste cooking oil biodiesel particle are smaller than those of diesel, and its harm to human body is lower than that of diesel. Soot particle lung deposited surface area by the combined effect of particle average diameter and number concentration, and its growth shows the same trend with the increase of number concentration.