Aging studies of biodiesel and HVO and their testing as neat fuel and blends for exhaust emissions in heavy-duty engines and passenger cars

In addition to these investigations the effects of HVO on the regulated and non-regulated emissions had also been tested extensively on heavy-duty engines and in a passenger car fleet test. The emissions of HVO and biodiesel were compared using a Euro III and a Euro IV heavy-duty engine with and without exhaust gas aftertreatment system. Furthermore, three passenger cars (Euro 3, 5 and 6) were examined in a fleet test for regulated and non-regulated emissions. The results showed that all heavy-duty engine emissions were lowered with the usage of HVO, compared with diesel fuel. In comparison with biodiesel, HVO also shows lower NOX emissions. This trend could not be confirmed using the passenger cars. In this investigation nitrogen oxide emissions increased between 5% and 14% versus diesel fuel. The increase was independent of the exhaust treatment.