Toxicologically acceptable levels of methanol and formaldehyde emissions from methanol-fueled vehicles
The increased interest in use of methanol makes it important to determine what levels of methanol and formaldehyde emissions may be acceptable. This paper reviews the available health data for methanol and formaldehyde to define what approximate ranges of concentrations, termed ranges of concern, could be acceptable from a toxicological viewpoint. Air quality models are then used to predict the in-use fleet average exhaust emission levels in localized situations (heavily impacted by mobile sources) corresponding to these ranges of concern. Using predicted fleet compositions, approximate target emission levels are given for the light-duty portion of the fleet which could yield these fleet averages. Finally, there is a brief summary of available methanol and formaldehyde emissions data from neat methanol-fueled vehicles which are compared to the target levels. In general, most of the design targets have already been met by current neat methanol-fueled vehicles, but some situations may require specific attention with respect to the design of emission control systems (e.g., cold start exhaust and hot soak evaporative emissions).
- OSTI ID:
- 5886304
- Report Number(s):
- TP-841357
- Country of Publication:
- United States
- Language:
- English
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63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
AIR POLLUTION ABATEMENT
AIR QUALITY
ALCOHOL FUELS
ALCOHOLS
ALDEHYDES
COMPILED DATA
DATA
EMISSION
ENVIRONMENTAL QUALITY
EXHAUST GASES
FLUIDS
FORMALDEHYDE
FUEL SUBSTITUTION
FUELS
GASEOUS WASTES
GASES
HAZARDS
HEALTH HAZARDS
HYDROXY COMPOUNDS
INFORMATION
MATHEMATICAL MODELS
METHANOL
METHANOL FUELS
NATIONAL ORGANIZATIONS
NUMERICAL DATA
ORGANIC COMPOUNDS
POLLUTION ABATEMENT
PUBLIC HEALTH
RECOMMENDATIONS
SYNTHETIC FUELS
TOXICITY
US EPA
US ORGANIZATIONS
VEHICLES
WASTES