Different Properties of Biodiesel in Comparison with Standard Diesel Fuel and their Impact on EURO VI Exhaust Aftertreatment Systems Umicore AG and Company KG

Format:

Conference/Event

Author/Creator:

Kattwinkel, Kattwinkel, author.

Contributor:

Petersson, Martin

Reith, Christoph

Conference Name:

SAE 2012 International Powertrains, Fuels & Lubricants Meeting (2012-09-18 : Malmo, Sweden)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2012

Summary:

The use of fatty acid methyl esters (FAME), often referred to asbiodiesel, instead of fossil diesel fuel is under consideration inorder to increase the share of fuels from renewable sources and toreduce greenhouse gas emissions. In Europe, commercial diesel fuelsalready contain up to 7% biodiesel. Higher biodiesel blends or theuse of pure biodiesel are probable measures to further increase theshare of fuels from renewable sources.Due to its different feedstock and refining process, thespecification of biodiesel reveals some important distinctions incomparison with standard diesel fuel. The current work aims todiscuss the possible implications of biodiesel utilization on theaftertreatment systems of recent heavy-duty diesel (HDD) vehiclescompliant with EURO VI legislation.In particular, the effect of biodiesel on heat-up operation,i.e., the increase of the exhaust gas temperature by catalyticcombustion of fuel within a diesel oxidation catalyst (DOC), isinvestigated. This operation is often used to facilitate the sootregeneration of a diesel particulate filter (DPF) mounteddownstream of the DOC.Engine bench testing has been performed, using two different7-liter HDD engines. Secondary fuel injection upstream of the DOCwas conducted at different temperatures and exhaust mass flows,comparing 100% biodiesel (B100) and a 30% biodiesel blend (B30)with standard diesel fuel (B0). The results indicate that biodieselrequests a higher minimum exhaust gas temperature for catalyticcombustion of the fuel within the DOC. While under the current testconditions 625°C downstream DOC can be achieved at DOC inlettemperature of 270°C, operation with B30 requires approximately320°C inlet temperature to achieve the same outlet temperature.When B100 is used for secondary fuel injection, even 34mDC inlettemperature is required.In order to explain the limitations of secondary fuel injectionwith biodiesel and biodiesel blends at lower exhaust gastemperatures, the evaporation characteristics of the utilized fuelsare discussed. The higher evaporation temperature level of fattyacid methyl esters in comparison to diesel fuel is suggested to bethe main reason for the different behavior

Notes:

Vendor supplied data

Publisher Number:

2012-01-1733

Access Restriction:

Restricted for use by site license