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Fuel economy and emissions of light-duty vehicles fueled with ethanol–gasoline blends in a Mexican City

Author

Listed:
  • Hernandez, Marcel
  • Menchaca, Lizette
  • Mendoza, Alberto

Abstract

The government of Mexico is mandating increased use of gasoline–ethanol blends as a method for reducing air pollution. However, tests on light-duty vehicles have revealed mixed results in terms of fuel economy and emissions. In addition, little information on the performance of light-duty vehicles fueled by gasoline–ethanol blends exists outside the conditions in Mexico City. Fuel economy and emission factors for commercial Regular (87 octane) and Premium (92 octane) gasoline were compared to corresponding 5% v/v (E05R/E05P) and 15% v/v (E15R/E15P) ethanol blends under the conditions in Monterrey, Mexico, the third largest urban center in the country. Fuel economy was estimated under real-world driving conditions. CO2, CO, NOx, and unburned hydrocarbons (HC) emissions were measured for cold- and hot-start tests, as well as for constant-speed (40 km/h) real in-city driving. The highest fuel economy was achieved with pure gasoline, which decreased by as much as 4.4% when an E05R gasoline blend was used and as much as 9.9% when an E15R blend was evaluated. For the Premium blends, the fuel economy decrease was lower: 2.9% and 5.5%, respectively. Even more significantly, the newest vehicles tested experienced the lowest decrease in fuel economy. Overall, the Premium blends, and in particular the E15P blend, resulted in decreased CO, NOx, and HC emissions. However, mixed results for NOx emissions were obtained during the start tests. In addition, HC emissions were higher for the Premium blends compared to the corresponding Regular blends. CO2 emissions changes were not significant for the constant-speed tests.

Suggested Citation

  • Hernandez, Marcel & Menchaca, Lizette & Mendoza, Alberto, 2014. "Fuel economy and emissions of light-duty vehicles fueled with ethanol–gasoline blends in a Mexican City," Renewable Energy, Elsevier, vol. 72(C), pages 236-242.
    • Handle: RePEc:eee:renene:v:72:y:2014:i:c:p:236-242
    DOI: 10.1016/j.renene.2014.07.018
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    References listed on IDEAS

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    1. Bayraktar, Hakan, 2005. "Experimental and theoretical investigation of using gasoline–ethanol blends in spark-ignition engines," Renewable Energy, Elsevier, vol. 30(11), pages 1733-1747.
    2. Topgül, Tolga & Yücesu, Hüseyin Serdar & Çinar, Can & Koca, Atilla, 2006. "The effects of ethanol–unleaded gasoline blends and ignition timing on engine performance and exhaust emissions," Renewable Energy, Elsevier, vol. 31(15), pages 2534-2542.
    3. Niven, Robert K., 2005. "Ethanol in gasoline: environmental impacts and sustainability review article," Renewable and Sustainable Energy Reviews, Elsevier, vol. 9(6), pages 535-555, December.
    4. García, Carlos A. & Manzini, Fabio & Islas, Jorge, 2010. "Air emissions scenarios from ethanol as a gasoline oxygenate in Mexico City Metropolitan Area," Renewable and Sustainable Energy Reviews, Elsevier, vol. 14(9), pages 3032-3040, December.
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    Cited by:

    1. Juan E. Tibaquirá & José I. Huertas & Sebastián Ospina & Luis F. Quirama & José E. Niño, 2018. "The Effect of Using Ethanol-Gasoline Blends on the Mechanical, Energy and Environmental Performance of In-Use Vehicles," Energies, MDPI, vol. 11(1), pages 1-17, January.
    2. Zhang, Bo & Sarathy, S. Mani, 2016. "Lifecycle optimized ethanol-gasoline blends for turbocharged engines," Applied Energy, Elsevier, vol. 181(C), pages 38-53.
    3. Badra, Jihad & AlRamadan, Abdullah S. & Sarathy, S. Mani, 2017. "Optimization of the octane response of gasoline/ethanol blends," Applied Energy, Elsevier, vol. 203(C), pages 778-793.

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