Overview
The purpose of this study is to better understand emissions and performance effects from renewable diesel and NOx-mitigated biodiesel relative to CARB ULSD. This study proposes to conduct detailed emissions testing on various renewable diesel blends (and potentially biodiesel blends) on heavy-duty off-road engines, with and without SCR exhaust treatment and diesel particulate filters (DPF) using an engine dynamometer. This study would focus on the physical and chemical characterization of particulate emissions and gaseous toxic pollutants from two off-road engines, one equipped with SCR and DPF aftertreatment systems and one older Tier 2 engine without aftertreatment system. SCAQMD will build upon the work UCR and CARB will be conducting in order to investigate the emissions of renewable diesel from newer technology off-road engines.
Lead Researcher: Dr. Georgios Karavalakis Co-researcher: Dr. Kent Johnson