Characterization of emissions from motor vehicles designed for low NO/sub x/ emissions. Final report, March 1977-June 1980

Technical Report · Fri Aug 01 04:00:00 EDT 1980

OSTI ID:5546226

Smith, L R

Tailpipe emissions were characterized for four advanced low NO/sub x/ catalyst equipped passenger cars under a variety of cyclic driving conditions. All of the vehicles had three-way catalysts, three with feedback carburetors and exhaust gas recirculation, and two with oxidation catalysts following the three-way catalysts. The emission rates of several unregulated pollutants including aldehydes, organic amines, sulfur dioxide, nitrous oxide, several individual hydrocarbons (including benzene), hydrogen sulfide, cyanide, organic sulfides, nickel carbonyl, ammonia, sulfate, trace metals, and N-nitrosodimenthylamine were determined. Additionally, the emission rates of the regulated pollutants, total hydrocarbons, carbon monoxide, and oxides of nitrogen were determined along with carbon dioxide and oxygen. Using three test fuels of varying sulfur content, the emissions were examined at an initial mileage and at 5000-mile intervals to 15,000 miles. Using a toxicity criteria, the most significant emissions were the currently regulated pollutants; sulfate was the most significant unregulated pollutant. Using commuter exposure models, exposures less than 0.07 OSHA 8-hour Threshold Limit Values are projected for typical congested freeway situations.

• Research Organization: Southwest Research Inst., San Antonio, TX (USA)
• OSTI ID: 5546226
• Report Number(s): PB-81-155327
• Country of Publication: United States
• Language: English

Related Subjects

500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR POLLUTION CONTROL
ALDEHYDES
AMINES
AUTOMOBILES
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
CONTROL
CYANIDES
ELEMENTS
EXHAUST GASES
FLUIDS
GASEOUS WASTES
GASES
HYDROCARBONS
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
METALS
NITROGEN COMPOUNDS
NITROGEN OXIDES
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
POLLUTION CONTROL
SULFIDES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
VEHICLES
WASTES