Using an oxidation flow reactor to understand the effects of gasoline aromatics and ethanol levels on secondary aerosol formation

Fuel type and composition affect tailpipe emissions secondary aerosol production from mobile sources. This study assessed the influence of gasoline fuels with varying levels aromatics ethanol on primary formation a flexible fuel vehicle equipped port injection engine. The was exercised over LA92 US06 driving cycles using chassis dynamometer. Secondary potential measured fast oxidation flow reactor. Results showed that high led to higher gaseous regulated emissions, as well particulate matter (PM), black carbon, total solid particle number. content (E78) resulted in reductions for pollutants some exceptions where elevated were seen this compared both E10 fuels, depending cycle. dominated by cold-start phase increased fuel. lower E78 due precursor In addition, operating conditions aftertreatment efficiency played major role organic inorganic formation, indicating properties, conditions, exhaust should be considered when evaluating precursors