Impact of oxygenated gasoline use on motor vehicle emissions
- Univ. of California, Berkeley, CA (United States); and others
Light-duty vehicle emissions were measured at the Caldecott tunnel in August and October, 1994. In the interval between these two periods, the average oxygen content of gasoline sold in the San Francisco Bay area increased from 0.3 to 2.0% by weight. Compared to the August (low-oxygenate) sampling period, measured emissions during the October (high-oxygenate) sampling period for CO and VOC decreased by 21 {plus_minus} 7 and 18 {plus_minus} 10% respectively, while NO{sub x} emissions showed no significant change. Formaldehyde emissions increased by 13 {plus_minus} 6%, acetaldehyde emissions did not change significantly, and benzene emissions decreased by 25 {plus_minus} 17%. Speciated VOC emission profiles show that use of oxygenated gasoline resulted in higher MTBE and lower aromatic hydrocarbon emissions, higher isobutene, and lower aromatic aldehydes.
- OSTI ID:
- 370001
- Report Number(s):
- CONF-960376--
- Country of Publication:
- United States
- Language:
- English
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