Browse Publications Technical Papers 2013-01-0523
2013-04-08

Diesel Emissions with DPF & SCR and Toxic Potentials with BioDiesel (RME) Blend Fuels 2013-01-0523

The use of alternative fuels and among them the biofuels of 1st generation - fatty acid methyl esters FAME's and pure plants oils - for propulsion of IC engines is an important objective in several countries in order to save the fossil fuels and to limit the CO₂ production.
The properties of bio-fuels and bio-blend-fuels can vary and this has an impact on the operation and emissions of diesel engines and on the modern exhaust aftertreatment systems.
The present paper represents the most important results obtained with RME at AFHB, EMPA and EC-JRC. Most of the activities were performed in the network project BioExDi (Biofuels, Exhaust Systems Diesel) in collaboration between industry and research institutes.
Following most important statements can be given about the treated subjects: - emissions (engine-out) are influenced by RME in the sense less CO, HC & PM, more NOx and more SOF, - there are positive influences of RME on the functionality of DOC and DPF due to higher reactivity of RME, no influence on SCR, - the long term functionality of exhaust aftertreatment systems with RME can be influenced by the potential higher availability of elements, like Ca, Mg, Zn, P, S, K, - regarding particle mass PM: without DPF there are slight tendencies of lowering TEQ at low load with RME and increasing TEQ at high load of the engine; with DPF there is a strong reduction of all toxic substances and there are no effects of RME on PAH & TEQ.
Some practical recommendations for the users of biofuels of the 1st generation are given at the end of the paper. Generally there is a necessity of higher costs and efforts for more frequent service and maintenance and for the quality controls of fuel and fuel supply chain.

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