Abstract
The effects of biodiesel oxidation on exhaust emissions in a diesel vehicle were investigated together with chamical components in the fuel. The biodiesel fuel made from 30% Rape-seed Methyl Ester blended fuel(RME30) was oxidized deliberately. When total acid number of the oxidized RME30 is low, there is little polymer and acid formation independent of peroxide number. The exhaust emissions in a diesel vehicle operated on the oxidized RME30 decrease or slightly increase compared to those for the fresh RME30. There is little negative effect of the oxidized biodiesel fuel within a low total acid number level on diesel exhaust emissions.
