Detailed effects of a diesel particulate filter on the reduction of chemical species emissions

Diesel particulate filters are designed to reduce the
mass emissions of diesel particulate matter and have
been proven to be effective in this respect. Not much is
known, however, about their effects on other
unregulated chemical species. This study utilized source
dilution sampling techniques to evaluate the effects of a
catalyzed diesel particulate filter on a wide spectrum of
chemical emissions from a heavy-duty diesel engine.
The species analyzed included both criteria and
unregulated compounds such as particulate matter
(PM), carbon monoxide (CO), hydrocarbons (HC),
inorganic ions, trace metallic compounds, elemental and
organic carbon (EC and OC), polycyclic aromatic
hydrocarbons (PAHs), and other organic compounds.
Results showed a significant reduction for the emissions
of PM mass, CO, HC, metals, EC, OC, and PAHs.

柴油颗粒过滤器旨在降低柴油颗粒物的质量排放，并在这一方面已被证明是有效的。然而，关于其对其他未受监管化学物种的影响，了解甚少。本研究采用源稀释采样技术，评估了催化柴油颗粒过滤器对重型柴油发动机广泛化学排放的影响。分析物种包括颗粒物（PM）、一氧化碳（CO）、烃类（HC）、无机离子、微量元素化合物、元素碳和有机碳（EC和OC）、多环芳烃（PAHs）以及其他有机化合物。结果显示，PM质量、CO、HC、金属、EC、OC和PAHs的排放量均显著减少。