Diesel-biodiesel blends with additives ethanol and diethyl ether are tested at idle.
In biodiesel blends, B20 with ethanol additive had cloud points below −25 °C.
Biodiesel blends with additives emitted much lower CO emissions than diesel.
Additives were found effective to reduce the increase in NOx from biodiesel blends.
Ethanol additives reduced HC emissions in B100 blends significantly at idling.