A predictive model to correlate fuel specifications with on-road vehicles emissions in Mexico.
Mexico is currently in the process of implementing its third air management program, which includes control measures targeting emissions reductions from mobile, point, and area sources. Achieving the program goals will require changes in the composition and in physical properties of gasoline and implementing an emissions reduction schedule. For that purpose a study was undertaken to support understanding of the effect of gasoline fuel parameters on exhaust emissions. Specifically, the relative impacts of Reid vapor pressure, distillation parameters, oxygen, sulfur, olefins, and aromatic contents on the exhaust emissions of in-use vehicles of the metropolitan area of Mexico City were investigated. The results were used to develop a model to predict CO, nitrogen oxides, total hydrocarbons, and toxic emissions such as benzene, 1,3-butadiene, formaldehyde, and acetaldehyde. Also a statistical model that predicts evaporative emissions was built. Results of the present model are compared with those obtained using the complex model of the United States Environmental Protection Agency.
Instituto Mexicano del Petróleo, Estudios Ambientales, Eje Central Lázaro Cárdenas No. 152, San Bartolo Atepehuacan, México, D.F., 07730, Mexico. ishifter@imp.mx
I
I
Schifter
L
L
Diaz
E
E
Lopez-Salinas
D000393:Air Pollutants / Q000032:analysis*; D002248:Carbon Monoxide / Q000032:analysis; D000431:Ethanol / Q000737:chemistry; D005742:Gasoline; D006838:Hydrocarbons / Q000032:analysis; D008738:Methyl Ethers / Q000737:chemistry; D008800:Mexico; D008962:Models, Theoretical; D018986:Motor Vehicles; D009589:Nitrogen Oxides / Q000032:analysis; D013455:Sulfur / Q000737:chemistry; D001335:Vehicle Emissions
D000393:Air Pollutants; D005742:Gasoline; D006838:Hydrocarbons; D008738:Methyl Ethers; D009589:Nitrogen Oxides; D001335:Vehicle Emissions; C043243:methyl tert-butyl ether; D000431:Ethanol; D013455:Sulfur; D002248:Carbon Monoxide