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The influence of an oxidation catalytic converter and fuel composition on the chemical and biological characteristics of diesel exhaust emissions.
McClure-BT; Bagley-ST; Gratz-LD
The Engineering Society for Advancing Mobility Land Sea Air and Space International, Technical Paper Series, No. 920854, Warrendale, Pennsylvania (Reprinted from Diesel Particulate Control, Trap, and Filtration Systems, SP-896) 1992 Jan; :271-288
In an effort to control harmful diesel fuel emissions the effects of oxidation catalytic converters (OCC) and fuel composition on the characteristics of diesel emissions were studied. Samples collected from an Engelhart PTX 10 DVC OCC located in the exhaust stream of an indirect injection Caterpillar 3304 PCNA mining engine using a transient cycle were analyzed for diesel particulate matter (DPM), mutagenic activity, and the presence of mutagenic and carcinogenic polynuclear aromatic hydrocarbons (PAH). The OCC decreased the range of soluble organic factors (SOF) and XAD-2 resin organic component (XOC) concentrations generated by both low aromatics diesel (LAD) and cetane adjusted (CA) fuel. Only the LAD fuel significantly decreased the concentration of soluble organic fraction. DPM concentrations were decreased by the OCC. Significantly lower levels of DPM, SOF, and SOL and significantly higher levels of XOC were seen with LAD compared with CA fuel, without use of the OCC; whereas with the OCC significantly lower levels of DPM and SOL were seen with LAD compared to CA fuel. The OCC significantly decreased the mutagenic activity of DPM extracts from both fuels and increased XOC associated mutagenic activity. LAD fuel generated emissions with significantly increased mutagenic activities on a mass basis compared with CA. Use of the OCC significantly decreased all PAH with the exception of benzo(a)pyrene (50328). CA fuel had significantly lower emission levels for pyrene (129000), benz(a)anthracene (56553), and benzo(b)fluoranthene (205992) with or without the OCC compared with LAD fuel. The authors conclude that OCCs in combination with low sulfur fuel have the potential to decrease exposure to harmful components of diesel exhaust.
NIOSH-Grant; Control-technology; Exhaust-gases; Diesel-exhausts; Airborne-particles; Control-equipment; Air-quality-control; Mutagenicity; Aromatic-hydrocarbons; Underground-mining
Biological Sciences Michigan Technological Univ. Dept. Biological Sciences Houghton, MI 49931
50-32-8; 129-00-0; 56-55-3; 205-99-2
The Engineering Society for Advancing Mobility Land Sea Air and Space International, Technical Paper Series, No. 920854, Warrendale, Pennsylvania (Reprinted from Diesel Particulate Control, Trap, and Filtration Systems, SP-896)
Michigan Technological University, Houghton, Michigan
Page last reviewed: May 5, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division