Comparison of particulate matter and polycyclic aromatic hydrocarbons in emissions from IDI-turbo diesel engine fueled by palm oil–diesel blends during long-term usage

Atmospheric Pollution Research

KhamphePhoungthong¹ 

关键词: Diesel engine;    Diesel emissions;    Mixed crude palm oil;    Particulate matter;    Polycyclic aromatic hydrocarbons;   

DOI  :  10.1016/j.apr.2016.10.006

学科分类：农业科学（综合）

来源: Dokuz Eylul Universitesi * Department of Environmental Engineering

【 摘 要 】

We examined particulate matter (PM), polycyclic aromatic hydrocarbons (PAHs), and carcinogenic potencies of benzo[a]pyrene equivalent (BaPeq) emissions from an indirect injection (IDI-turbo) diesel engine fueled by commercial diesel (PB0) and palm oil blends with portions of 40 and 50 vol.% (PB40 and PB50). The engine was in operation over long-term test cycles. A four-stage cascade impactor air sampler was used to collect particles emitted from the engine. The PM and PAHs were predominantly fine particles (<1 μm) and show an accumulation mode. The total emissions of the IDI-turbo diesel engine increased when the operation times were increased. The mass fractions of 2–3 rings PAHs using PB0, PB40, and PB50 contributed 35.5%–40.6%, 44.7%–50.2%, and 45.9%–51.4%, respectively; for PB0 2–3 ring PAHs contributed less than palm oil blends. Using PB40 and PB50 caused a higher emission of lower molecular weight PAHs than PB0. However, the mass fractions showed that the concentration of 4–6 ring PAHs increased when the running time of the engine was increased for all three fuels. The results in this study showed that significant emissions of PM, PAHs, and BaPeq were reduced as the fraction ratio of palm oil was increased because palm oil blends have a high amount of oxygen, which enhances combustion compared to PB0. Although PM, PAHs, and BaPeq emissions of PB50 were less than those of PB0 and PB40, PB50 is not an appropriate fuel for the long-term running of this engine.

【 授权许可】

CC BY