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Environmental Monitoring and Assessment

, Volume 186, Issue 6, pp 3969–3983 | Cite as

The contribution of evaporative emissions from gasoline vehicles to the volatile organic compound inventory in Mexico City

  • I. SchifterEmail author
  • L. Díaz
  • R. Rodríguez
  • C. González-Macías
Article

Abstract

The strategy for decreasing volatile organic compound emissions in Mexico has been focused much more on tailpipe emissions than on evaporative emissions, so there is very little information on the contribution of evaporative emissions to the total volatile organic compound inventory. We examined the magnitudes of exhaust and evaporative volatile organic compound emissions, and the species emitted, in a representative fleet of light-duty gasoline vehicles in the Metropolitan Area of Mexico City. The US “FTP-75” test protocol was used to estimate volatile organic compound emissions associated with diurnal evaporative losses, and when the engine is started and a journey begins. The amount and nature of the volatile organic compounds emitted under these conditions have not previously been accounted in the official inventory of the area. Evaporative emissions from light-duty vehicles in the Metropolitan Area of Mexico City were estimated to be 39 % of the total annual amount of hydrocarbons emitted. Vehicles built before 1992 (16 % of the fleet) were found to be responsible for 43 % of the total hydrocarbon emissions from exhausts and 31 % of the evaporative emissions of organic compounds. The relatively high amounts of volatile organic compounds emitted from older vehicles found in this study show that strong emission controls need to be implemented in order to decrease the contribution of evaporative emissions of this fraction of the fleet.

Keywords

Hydrocarbons Evaporative emissions Mexico City Inventory Vehicles 

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Copyright information

© Springer International Publishing Switzerland 2014

Authors and Affiliations

  • I. Schifter
    • 1
    Email author
  • L. Díaz
    • 1
  • R. Rodríguez
    • 1
  • C. González-Macías
    • 1
  1. 1.Instituto Mexicano del Petróleo, Dirección de Investigación y PosgradoMéxico, D.F.Mexico

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