Filtration of submicron particles from motorcycle emission using a DC low electrostatic filter

This study develops a new method for a filtering system of submicron particles (PM0.1, as known as ultrafine particles) emitted by motorcycle. The filter is based on electrostatics theory for capturing the particles using a constant DC low electrostatic voltage of 12 Volts from the motor battery. The filter consists of multilevel capacitors with the gap distance in the range of 9 to 36 mm called F1, F2, F3, and F4. The performance of the filter is presented as efficiency defined by the capability of the filter to reduce ultrafine particles showing the difference of ultrafine concentration before and after applying the filter on the motor exhaust. The particle concentrations were measured using a TSI P-Trak Ultrafine Particle Counter Model 8525. The result shows that the filter reduced the ultrafine particles with the efficiency between 5 to 37% depending on the gap distance of the capacitor.