Effects of Fuel Ethanol Content and Volatility on Regulated and Unregulated Exhaust Emissions for the Latest Technology Gasoline Vehicles
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- 作者：Thomas D. Durbin ; J. Wayne Miller ; Theodore Younglove ; Tao Huai ; Kathalena Cocker
- 刊名：Environmental Science & Technology
- 出版年：2007
- 出版时间：June 1, 2007
- 年：2007
- 卷：41
- 期：11
- 页码：4059 - 4064
- 全文大小：155K
- 年卷期：v.41,no.11(June 1, 2007)
- ISSN：1520-5851
文摘
Oxygenate content and fuel volatility (distillation) variablesare important parameters affecting vehicle exhaustemissions, and data on their effects on the latest technologyvehicles are quite limited. For this study, 12 California-certified LEV to SULEV vehicles were tested on a matrixof 12 fuels with varying levels of ethanol concentration (0,5.7, and 10 vol %), T50 (195, 215, and 235 
F), and T90(295, 330, and 355 F). There were statistically significantinteractions between ethanol and T90 for NMHC, ethanol, andT50 for CO and ethanol and T50 for NOx. NMHC emissionsincreased with increasing ethanol content at the midpointand high level of T90 but were unaffected at the low T90level. CO emissions decreased as the ethanol contentincreased from the low to the midpoint level for all levelsof T50, but between the 5.7 and 10% ethanol levels, COshowed only an increase for the high level of T50. NOxemissions increased with ethanol content for some conditions.Non-methane organic gases (NMOG) and toxic emissionswere examined for only a subset of fuels with thehighest T90 level, with NMOG, acetaldehyde, benzene, and1-,3-butadiene all found to increase with increasingethanol content.
F), and T90(295, 330, and 355 F). There were statistically significantinteractions between ethanol and T90 for NMHC, ethanol, andT50 for CO and ethanol and T50 for NOx. NMHC emissionsincreased with increasing ethanol content at the midpointand high level of T90 but were unaffected at the low T90level. CO emissions decreased as the ethanol contentincreased from the low to the midpoint level for all levelsof T50, but between the 5.7 and 10% ethanol levels, COshowed only an increase for the high level of T50. NOxemissions increased with ethanol content for some conditions.Non-methane organic gases (NMOG) and toxic emissionswere examined for only a subset of fuels with thehighest T90 level, with NMOG, acetaldehyde, benzene, and1-,3-butadiene all found to increase with increasingethanol content.