1979-02-01

Particulates and Associated Emissions From Two Medium-Duty Diesel Engines 790420

Experimental data were obtained from two medium-duty diesel engines derated to qualify for use in underground mines. Gaseous and particulate emissions from these engines were measured and results provide information on the effect of exhaust treatment devices on the emissions. The devices in the study were a catalyst, a particulate trap, and an exhaust gas cooler of the water scrubber type.Emission levels of carbon monoxide and hydrocarbons were observed to be very low in comparison with emissions levels of comparable engines in full-rated operation. Oxides of nitrogen and benzo(a)pyrene content of the exhaust also were found to be somewhat low in comparison with previous findings. For particulate reduction, the combination of a particulate trap and a scrubber was observed to be the more effective of the combinations tried; in some cases over 60% particulate reduction was effected by the trap/scrubber combination.

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