Impact of a ceramic trap and manganese fuel additive on the biological activity and chemical composition of exhaust particles from diesel engines used in underground mines.
Kittelson DB; Draper WM; Hartmann H; Watts WF Jr.; Baugard KJ
SAE Technical Paper Series 1987-87-1621 1987 Jan; :1-18
The effects of a ceramic particle trap and a manganese (7439965) fuel additive on the mutagenic activity and chemical composition of exhaust particulate matter from a heavy duty diesel engine commonly used in mining equipment were evaluated. Dilution tunnel samples was used from a four cylinder, naturally aspirated, indirect injection engine which was operated at six steady state conditions. Use of the manganese fuel additive without a ceramic particle trap increased the total cycle mutagenic activity emitted by seven fold. This was due in part to the increased emissions of 1-nitropyrene (5522430). When the trap was used at the recommended concentration the mass of emitted diesel exhaust particulate matter was greatly reduced, and the total output of bacterial mutagens and 1- nitropyrene was reduced. When the manganese additive was used with the ceramic trap, there was little effect on particle removal efficiency, the removal of mutagenic substances was decreased from 72 to 43 percent, and the trap regeneration temperature was reduced by 65 degrees-C. Evaluation of the usefulness of the manganese additive must take into account the benefits of reduced trap regeneration temperature with some deterioration in trap performance. The authors conclude that the ceramic particle trap may be useful for improving mine air quality and minimizing potential adverse effects of operating diesel engines in underground mines.
NIOSH-Grant; Cancer; Mining-equipment; Fuels; Diesel-exhausts; Air-quality; Diesel-emissions
Calif Pub Hlth Fdn California Pub Hlth Foundtion P O Box 520 Berkeley, Calif 94701-0520
SAE Technical Paper Series
California Public Health Foundation, Berkeley, California