| Quantification of Local Ozone Production Attributable to Automobile Hydrocarbon Emissions |
| Journal & Paper No: |
| SAE Paper 2001-01-3760 |
| Authors: |
| Stanislav V. Bohac and Dennis N. Assanis |
| Abstract: |
When
automobile hydrocarbons are exhausted into the atmosphere in the
presence of NOx and sunlight, ground-level ozone is formed. While
researchers have used Maximum Incremental Reactivity (MIR) factors
to estimate ozone production, this procedure often overestimates
Local Ozone Production (LOP) because it does not consider local
atmospheric conditions. In this paper, an enhanced MIR methodology
for estimating actual LOP attributable to a vehicle in a particular
ozone problem area is presented. In addition to using tabulated
MIR factors, the procedure also uses local hydrocarbon reaction
terms and a relative mechanistic reactivity term that account
for local atmospheric conditions. Through this approach, the effects
of hydrocarbon reaction rates, hydrocarbon residence times, and
prevailing HC/NOx ratio are accounted for. The procedure is intended
to enable automotive engineers to more realistically estimate
actual local ozone production resulting from hydrocarbon emissions. |
| Paper: P2001_06.PDF |
Copyright
2008
University of Michigan