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Electrostatic control of particulate emissions from diesel-powered machinery.

Farnoud A; Armendariz AJ
Proceedings of the AAAR 26th Annual Conference, September 24-28, 2007, Reno, Nevada. Mt. Laurel, NJ: American Association for Aerosol Research, 2007 Sep; :332
Diesel engines are more efficient than gasoline engines but high emissions of soot are a concern in both the environmental and occupational setting. Experimental and recently commercialized diesel particulate mechanical filters can cause considerable fuel penalty, are prone to thermal fracture, and are not applicable for a wide variety of non-road mobile and machinery applications. Electrostatic precipitators have been used by utilities and heavy industry for nearly a century but they have not been successfully miniaturized for use on mobile sources and machinery. The objective of this study was to investigate the removal efficiency and optimized the performance of a small-scale electrostatic precipitator for diesel exhaust particulate control on a diesel-powered electric generator. The exterior dimensions of the ESP were 32 x 22 x 21 cm and the collection plates were 25 x 15 cm. The ESP was designed for easy adjustments of plates and wire positions, wire types, and total plate area. Tests were performed at both positive and negative corona polarities. Mass control efficiency measurements were made by sampling particles on to Teflon-coated fibrous filters, two different particle counters, a CPC and a nephalometer, were used to determine coarse particle (<500 nanometers) and fine particle (15nm<dp<500nm) number collection efficiencies. Results show that that ESP was able to reduce mass emissions by 90%, and reduce coarse number emissions by 75%, and fine particle emissions by 65%.
Diesel-exhausts; Diesel-emissions; Particulates; Particulate-dust; Fuels; Emission-sources; Air-quality; Airborne-particles; Electrostatic-precipitators; Electrostatic-filters
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Proceedings of the AAAR 26th Annual Conference, September 24-28, 2007, Reno, Nevada
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Southern Methodist University
Page last reviewed: September 2, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division