| Author | Search for: Dev, S.1; Search for: Neill, Stuart W.1; Search for: Johnston, J.; Search for: Mitchell, K. |
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| Affiliation | - National Research Council of Canada. Energy, Mining and Environment
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| Format | Text, Article |
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| Conference | 16th International Conference on Stability Handling and Use of Liquid Fuels, September 8-12, 2019, Long Beach, USA |
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| Abstract | Diesel fuel lubricates the fuel injection system in compression ignition engines. ASTM Test Method D6079 is a standardized bench test that uses the high-frequency reciprocating rig (HFRR) to evaluate the boundary lubricating properties of diesel fuel. The addition of 2-ethylhexyl nitrate (2-EHN) cetane improver additive (CIA) has been shown to increase the HFRR wear scar diameter (WSD) of some diesel fuels. However, this result was shown to be incongruent with pump rig tests conducted with the same diesel fuels. The objective of this research is to investigate the impact of CIAs on the HFRR WSD. HFRR lubricity tests were performed with No. 1-D or No. 2-D ultra-low sulfur diesel (ULSD) fuels with ester- or monoacid-type lubricity improver additives (LIAs) and nitrate-type CIA. Different strategies for modifying the diesel fuel or the test procedure to minimize the 2-EHN effect on HFRR WSD were evaluated. When 2-EHN CIA was added to the No. 2 diesel fuel with an appropriate treat rate of ester- or monoacid-type LIA, the HFRR WSD increased by up to 200 µm. However, the addition of 2-EHN to the No. 1-D ULSD fuel did not increase the HFRR WSD. The results show that doubling the LIA treat rate or a 2% blend of biodiesel are two workarounds that reduce the HFRR WSD back to acceptable levels. A slight modification to the Test Method that involves ramping up the reciprocating frequency over a period of time shows potential for minimizing the thermal decomposition of 2-EHN during a lubricity determination. |
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| Publication date | 2019-09-08 |
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| Publisher | IASH |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | befe302e-9907-410a-9d12-94f5804bd962 |
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| Record created | 2021-03-15 |
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| Record modified | 2021-03-15 |
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