Experimental Study on the Influence of Acoustic Waves on the Particle Emissions from an IC Engine Fueled with Diesel and Isopropanol-Biodiesel Blends

Sai Manoj Rayapureddy, Jonas Matijošius, Alfredas Rimkus () and Aleksandras Chlebnikovas
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Sai Manoj Rayapureddy: Department of Mobile Machinery and Railway Transport, Vilnius Gediminas Technical University, Plytinės Str. 25, 10105 Vilnius, Lithuania
Jonas Matijošius: Mechanical Science Institute, Vilnius Gediminas Technical University, Plytinės Str. 25, 10105 Vilnius, Lithuania
Alfredas Rimkus: Department of Automobile Engineering, Faculty of Transport Engineering, Vilnius Gediminas Technical University, Plytines Str. 25, 10105 Vilnius, Lithuania
Aleksandras Chlebnikovas: Mechanical Science Institute, Vilnius Gediminas Technical University, Plytinės Str. 25, 10105 Vilnius, Lithuania

Energies, 2025, vol. 18, issue 22, 1-14

Abstract: Road transport in the European Union is responsible for approximately 60% of PM10 emissions and 45% of PM2.5 emissions. Acoustic agglomeration is researched to be the most effective after-treatment method to control particle pollution. Recent experimental research suggests that at a frequency of around 20 kHz and a sound pressure level of 140 dB, particles can be agglomerated. The kinetic energy of the particles is influenced by the presence of acoustics, and this enhances the collision efficiency between the particles. These collided fine particles increase in size and can be easily filtered through conventional filters. Additionally, clean burning biofuels produce comparatively fewer particles; hence RME is used for experiments along with its two blends of isopropanol (RME95I5 and RME90I10). The results are then compared to those of standard diesel fuel. With an increase in load, an average reduction of 20% in fine particles is observed along with an increase in large-sized particles. The aggregation of smaller particles is observed in a range of 0–50% in almost all tested conditions. With the increase in isopropanol from 5 to 10%, oxygen content in the fuel increased by 7%, a 1% reduction in carbon and a 2% reduction in C/H ratio is observed which led to a 6 and 9% reduction in particle emissions at 60 Nm and 90 Nm, respectively. At higher loads, D100, RME95I5 and RME90I10 recorded an agglomeration of 10%, 111% and 189%, respectively. Similar results are observed for the tendency for agglomeration at lower loads.

Keywords: particle emissions; acoustic agglomeration; diesel engine; biodiesel; isopropanol (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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