Application of Acoustic Agglomeration Technology to Improve the Removal of Submicron Particles from Vehicle Exhaust

Inga Garbarienė,Vadimas Dudoitis,Steigvilė Byčenkienė,Vidmantas Ulevičius,Kristina Plauškaitė-Šukienė,Sergejus Borodinas,Artūras Kilikevičius,Jonas Matijošius,Alfredas Rimkus,Kristina Kilikevičienė,Darius Vainorius,Algirdas Maknickas

doi:10.3390/sym13071200

Abstract

The natural processes of interactions between aerosol particles in the ambient air through which they agglomerate is a vast area of chamber research and are inherent to many industries and are often inter-connected with transport engineering. Further improvement of symmetric methods for aerosol particle number and mass concentration reduction made it possible to create various synergic techniques. The study used a 1.9 TDI diesel internal combustion engine, which was supplied with diesel (D100) and second-generation biofuels (NExBTL100) with the EGR exhaust system on and off. Measurements were performed using a Bruel and Kjær “Type 9727” system for measurement of vibrations, a scanning mobility particle sizer (SMPS) and an original agglomeration chamber. The three modes of particle size distributions were observed in the size range from 10 to 470 nm for both D100 and NExBTL100 fuels with and without the use of the EGR system. The application of 21.3 kHz frequency sound with SPL 144.1 dB changed the NExBTL100 generated aerosol particle number concentration but did not sufficiently affect the concentration of D100 emitted particles. The greatest agglomeration effect (21.7 ± 10.0%) was observed in the range of extremely small NExBTL100 derived particles (10–70 nm) when used in combination with an EGR system.

Highlights

The transport sector has been regarded as the significant contributor of particulate matter (PM) pollution in modern cities [1,2]
Many technologies, such as exhaust gas recirculation (EGR) systems, diesel oxidation catalysts (DOCs), diesel particulate filters (DPFs) and closed crankcase ventilation (CCV) refer to those that deal with aerosol particle reduction
The three modes of aerosol particle number size distributions were observed in the size range from 10 to 470 nm for all investigated fuels, operating with and without EGR

Summary

Introduction

The transport sector has been regarded as the significant contributor of particulate matter (PM) pollution in modern cities [1,2]. Solid particle number limits (SPN—equal to 6·× 1011 p/km) were introduced in 2011 in the EU for diesel light-duty vehicles due to adverse health effects and climate-warming potential. Use of diesel particle filters in light-duty vehicles is becoming standard in many countries in order to reduce the ill effects of diesel generated particles, which have a significant role in air pollution. Aerosol particle number and mass concentration symmetric reduction is at the core of transport engineering and manufacturing. Many technologies, such as EGR systems, diesel oxidation catalysts (DOCs), diesel particulate filters (DPFs) and closed crankcase ventilation (CCV) refer to those that deal with aerosol particle reduction

Methods

Results

Conclusion