AI Summary & Key Takeaways
AI InsightAlthough 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.
📌 3 Key Takeaways
Özet
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 bycommercial 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 mm) 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 2e3 rings PAHs using PB0, PB40, and PB50 contributed 35.5%e40.6%, 44.7%e50.2%, and 45.9%e51.4%, respectively; for PB0 2e3 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 showedthat the concentrationof 4e6 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.