不同路线国V车用重型柴油机颗粒物中SOF与PAHs的对比研究.pdfVIP

  不同路线国V 车用重型柴油机颗粒物中SOF 和 PAHs 的对比研究 李洧，郭红松，刘双喜，王传琪，李菁元，曹磊 中国汽车技术研究中心，天津 300162 【摘要】本文使用 AVL 全流采样（CVS ）系统，对 2 台国V 车用重型柴油机进行了 ESC 、ETC 循环 试验，并利用气相色谱-质谱联用仪等设备对颗粒物中的可溶性有机物（SOF）和多环芳烃（PAHs）进行了 分析。通过对比采用 DOC+DPF 和 SCR 两种技术路线柴油机的 SOF 和 PAHs 及其组份排放情况，对它们 的排放特性进行了研究。研究发现，无论是 ESC 循环下还是 ETC 循环下，DOC+DPF 路线发动机 PM 排 放中 SOF 含量以及 PAHs 排放总浓度都要明显低于 SCR 路线；而且，PM 中菲和芘的浓度会降低一半 以上。 【关键词】国V标准，重型柴油机,可溶性有机物, 多环芳烃 中图分类号：TK421 文献标志码：A Study of SOF and PAHs of Particle Matter for Chinese V Heavy-duty Diesel Engines Using Different Technology Routes Wei Li ，Hongsong Guo，Shuangxi Liu, Chuanqi Wang，Jingyuan Li ，Lei Cao China Automotive Technology and Research Center, Tianjin 300162 Abstract: Two Chinese V heavy-duty diesel engines were tested by running ESC and ETC cycles on an AVL engine test bench with Constant Volume Sample System (CVS) in this paper, and SOF(soluble organic fraction) and PAHs(polycyclic aromatic hydrocarbons) were measured by GC-MS equipment et. al. The exhaust characteristic was studied by comparing the fraction of SOF in PM(particle matter) and PAHs emissions of the two engines using different technology routes: DOC+DPF and SCR. It was found that the fraction of SOF in PM and the concentration both of PAHs and the contents of PAHs in PM decreased obviously for DOC+DPF technology comparing to SCR technology for both ESC and ETC cycles. Whatever, the phenanthrene and pyrene in PM reduced by more than 50%. Key words: Chinese V standard, Heavy-duty diesel engine, Polycyclic aromatic hydrocarbon, So