Tan Ji-hua, Shi Xiao-yan, Zhang Jie, He Ke-bin, Ma Yong-liang, Ge Yun-shan, Tan Jian-wei
Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China.
Huan Jing Ke Xue. 2009 Oct 15;30(10):2839-44.
PM2.5 emissions and polycyclic aromatic hydrocarbons (PAHs) in PM2.5 of pure biodiesel derived from different feedstocks were investigated and compared with diesel fuel. B100-1 (soyabean oil derived), B100-2 (waste oil derived) and diesel fuel were tested on a diesel engine bench at four operating conditions, including two steady speeds of different loads. The fine particles were collected by fiber quartz filter and particle phase PAHs were analyzed by GC-MS. Compared with diesel fuel, biodiesel decreased PM2.5 emission rates with a maximal reduction rate of 37.3% at operating modes of high loads, while increased PM2.5 emission rates at low loads. PAHs emission rates from biodiesel decreased at all tested modes, with a maximal reduction rate of 77.6%. The emission rates of PM2.5 and PAHs of B100-2 were 14.7% and 17.8% times of B100-1. Low molecular weight PAHs dominated in the emission of three fuels with phenanthrene as maxima and 2-ring and 3-ring PAHs accounted for more than 50% of the total PAHs. Toxic equivalence of PAHs emissions of biodiesel was decreased greatly compared with that of diesel.
研究了不同原料来源的纯生物柴油中PM2.5排放以及PM2.5中的多环芳烃（PAHs），并与柴油进行了比较。在柴油发动机试验台上对B100 - 1（大豆油衍生）、B100 - 2（废油衍生）和柴油在四种运行条件下进行了测试，包括不同负荷的两个稳定转速。通过纤维石英过滤器收集细颗粒物，并用气相色谱 - 质谱联用仪分析颗粒相PAHs。与柴油相比，生物柴油在高负荷运行模式下降低了PM2.5排放率，最大降低率为37.3%，而在低负荷时增加了PM2.5排放率。生物柴油在所有测试模式下的PAHs排放率均下降，最大降低率为77.6%。B100 - 2的PM2.5和PAHs排放率分别是B100 - 1的14.7%和17.8%。三种燃料排放中低分子量PAHs占主导，以菲含量最高，2环和3环PAHs占总PAHs的50%以上。与柴油相比，生物柴油PAHs排放的毒性当量大幅降低。
