Technical Paper
Hydrocarbons and Aldehydes from a Diesel Engine Running on Ethanol and Equipped With EGR, Catalyst and DPF
2004-06-08
2004-01-1882
A commercially available exhaust aftertreatment system, DNOX™, comprising exhaust gas recirculation (EGR), an oxidative catalyst and a continuously regenerating diesel particulate filter (DPF) were tested. The test object was a 9-litre ethanol-fueled diesel engine from Scania equipped with turbocharger and aftercooler. A similar diesel engine from Scania, but running on ordinary Swedish diesel fuel, was used as a reference and a reminder of “the state of the art”. The tests involved two different ethanol fuels containing various ignition improvers, Beraid 3540 and rapeseed methyl ester. Test conditions for the engines were those specified in the European Stationary Cycle (ESC). The aftertreatment system reduced the emissions of HC, CO and NOX, down to 0.15, 0.04 and 2.54 g/kWh, respectively, while the estimated particle mass was reduced by 67%. Actually, by using the DNOX™ system, the engines became Euro IV engines regarding the emissions of HC, CO and NOx.