|Author||Search for: Neill, W. Stuart1; Search for: Littlejohns, Jennifer V.1; Search for: Carrier, Annie-France1; Search for: Lafrance, Simon1; Search for: Mitchell, Ken|
- National Research Council of Canada. Energy, Mining and Environment
|Conference||IASH 2015, the 14th International Symposium on Stability, Handling and Use of Liquid Fuels, October 4-8, 2015, Charleston, South Carolina, USA|
|Subject||renewable diesel; fuel supplier; lower carbon diesel fuel|
Renewable diesel is a hydrocarbon blending component option available to fuel suppliers to meet the current renewable fuel regulations in North America, while offering a potential pathway to lower carbon diesel fuels in the future. In this study, the lubricity of renewable diesel fuel blends additized with ester- and monoacid-type lubricity improver additives (LIAs) was investigated following the ASTM D6079-11 test method. Appropriate LIA treat rates were established for the base fuel, an ultra-low sulphur diesel fuel derived from oil sands sources, using the high-frequency reciprocating rig (HFRR). Then, 10, 20, 30 and 50% renewable diesel and winter-grade diesel/jet components were blended with the base fuel using the same lubricity additive treat rates required for the base fuel. The experimental results show that the test fuels with higher renewable content produced larger HFRR wear scar diameters (WSDs) for both lubricity additive types. The WSD increase was more significant for the renewable diesel fuel blends with the ester-based LIA. This may be related to the observation that the ester-based lubricity additive was not completely miscible with the base fuel or the renewable fuel blends. Significant fractions of the test fuels with higher levels of volatile, winter-grade diesel/jet components were found to evaporate during lubricity determinations, which effectively increased the LIA treat rates. The HFRR WSDs were larger when a covered 15 ml sample was used to measure the lubricity of the more volatile diesel fuels in place of the 2 ml sample specified in the ASTM test method. This suggests that a larger factor of safety should be used when employing ASTM D6079-11 test method to measure the lubricity of more volatile diesel fuels.
|Publisher||International Association for Stability, Handling, and Use of Liquid Fuels, Inc.|
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