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Environ Monit Assess

Title:		The contribution of evaporative emissions from gasoline vehicles to the volatile organic compound inventory in Mexico City
Author(s):		Schifter I; Diaz L; Rodriguez R; Gonzalez-Macias C;
Address:		"Instituto Mexicano del Petroleo, Direccion de Investigacion y Posgrado, Eje Central Lazaro Cardenas No. 152, San Bartolo Atepehuacan, 07730, Mexico, D.F., Mexico, ishifter@imp.mx"
Journal Title:		Environ Monit Assess
Year:		2014
Volume:		20140214
Issue:		6
Page Number:		3969 - 3983
DOI:		10.1007/s10661-014-3672-2
ISSN/ISBN:		1573-2959 (Electronic) 0167-6369 (Linking)
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:		Air Pollutants/*analysis Air Pollution/statistics & numerical data Cities Environmental Monitoring Gasoline Mexico Vehicle Emissions/*analysis Volatile Organic Compounds/*analysis;
Notes:		"MedlineSchifter, I Diaz, L Rodriguez, R Gonzalez-Macias, C eng Netherlands 2014/02/15 Environ Monit Assess. 2014 Jun; 186(6):3969-83. doi: 10.1007/s10661-014-3672-2. Epub 2014 Feb 14"