Effects of emissions standards on methanol vehicle-related ozone, formal dehyde, and methanol exposure

Conference · Fri Jan 01 04:00:00 EST 1988

OSTI ID:7010230

Gold, M D; Moulis, C E ^[1]

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1. SDSB/EPA Ann Arbor, MI (US)

EPA is in the process of establishing emission standards to remove a potential regulatory barrier to the production of methanol vehicles. The proposed emissions standards were published in 1986. These standards would, with few exceptions, apply the current exhaust emission standards for petroleum-fueled Otto-cycle and diesel vehicles to methanol- fueled vehicles with Otto-cycle or diesel-like combustion processes. The current hydrocarbon (HC) standards were proposed to be applied on a carbon equivalent basis to the sum of emitted methanol, formaldehyde, and non-oxygenated HC. The evaporative standards for gasoline vehicles were proposed to be applied on a carbon equivalent basis to the sum of emitted methanol and HC for all methanol vehicles. It was found that regulation of the sum of the various organics would provide adequate control of the individual components, obviating separate standards for methanol or formaldehyde. In an earlier APCA publication one of the authors presented projections, used in developing the proposed regulations, of methanol vehicles' impact on formaldehyde and methanol concentrations in commonly encountered driving scenarios and on peak ambient ozone levels in Los Angeles. This analysis updates that earlier publication with an emission factor data base that is applied to: an expanded 21 city ozone model, and the driving scenarios used to model typical methanol and formaldehyde concentrations. This analysis also provides, for the first time, an estimate of mobile source contribution to overall formaldehyde exposure, and places the potential impact of methanol vehicles on formaldehyde concentrations into perspective.

• OSTI ID: 7010230
• Report Number(s): CONF-880679--
• Country of Publication: United States
• Language: English

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54 ENVIRONMENTAL SCIENCES
540120 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
AIR POLLUTION CONTROL
AIR POLLUTION MONITORING
AIR QUALITY
ALCOHOL FUELS
ALDEHYDES
AUTOMOTIVE FUELS
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
CLEAN AIR ACT
COAL LIQUIDS
CONTROL
ENERGY SOURCES
ENVIRONMENTAL EXPOSURE PATHWAY
ENVIRONMENTAL QUALITY
FLUIDS
FORMALDEHYDE
FOSSIL FUELS
FUEL GAS
FUEL SUBSTITUTION
FUELS
GAS FUELS
GASES
LAWS
LIQUIDS
METHANOL FUELS
NATIONAL ORGANIZATIONS
NATURAL GAS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
OZONE
POLLUTION CONTROL
POLLUTION LAWS
RECOMMENDATIONS
STANDARDS
SYNTHETIC FUELS
US EPA
US ORGANIZATIONS
VAPORS
VEHICLES