Gasohol, TBA (Tertiary Butyl Alcohol), MTBE (Methyl Tertiary Butyl Ether) Effects on Light-Duty Emissions

摘要

This report describes the laboratory testing of unleaded gasoline and gasoline mixtures containing ethanol, tertiary butyl alcohol (TBA), and methyl tertiary butyl ether (MTBE). Four different vehicles were employed in this study. Analytical procedures for the measurement of TBA and ethanol in exhaust and evaporative emissions were developed. Regulated and several unregulated emission rates were determined during the entire Federal Test Procedures (FTP) for each vehicle using several gasolines. The exhaust emission rates of hydrocarbons (HC), carbon monoxide (CO), oxides of nitrogen (NOx), individual hydrocarbons (IHC), and aldehydes are reported in grams per kilometer. Evaporative emissions for total hydrocarbons, TBA, and ethanol are reported in grams.