Technical Paper
Effect of Gasoline Compositions and Properties on Tailpipe Emissions of Currently Existing Vehicles in Thailand
1999-10-25
1999-01-3570
The purpose of this study is to evaluate the effect of gasoline compositions and properties on vehicle tailpipe emissions in order to propose the automotive gasoline specifications in Thailand to be revised by the year 2000. A total of 270 exhaust emissions measurements were conducted using fifteen fuels according to Thailand emission standard test, TISI 1280 - 2538 (91/441/EEC). Six cars with different fuel supply systems or emission control devices were selected for the test based on the market share in Thailand. The following eight fuel parameters were examined: Reid Vapor Pressure (RVP), the 50 th percent distillation temperature (T50) and content of aromatics, olefins, benzene, MTBE, ethanol and sulfur. Total hydrocarbon (THC), carbon monoxide (CO), oxides of nitrogen (NOx) and toxic air pollutants such as benzene, 1,3-butadiene and carbonyl compounds were analyzed.
