Difference between revisions of "Diesel and Biodiesel Lubricity"
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Leenesh Moodliyar, '''Effect of Biodiesel Addition to Lubricity of Coal-Based Diesel'''<br/> | Leenesh Moodliyar, '''Effect of Biodiesel Addition to Lubricity of Coal-Based Diesel'''<br/> | ||
[ftp://anonymous@ragnarok.up.ac.za/publicftp/lab/Tribology/Diesel%20and%20Biodiesel%20Lubricity/2008/Leenesh%20Moodiyar%20-%20CSC410.pdf Final Year Project Report] | [ftp://anonymous@ragnarok.up.ac.za/publicftp/lab/Tribology/Diesel%20and%20Biodiesel%20Lubricity/2008/Leenesh%20Moodiyar%20-%20CSC410.pdf Final Year Project Report] | ||
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| + | === 2010 === | ||
| + | Dean Riley, '''Effect'''<br/> | ||
| + | [ftp://anonymous@ragnarok.up.ac.za/publicftp/lab/Tribology/Diesel%20and%20Biodiesel%20Lubricity/2010/20100528_Report%28marked%29%28RileyD%29.pdf Final Year Project Report] | ||
| + | |||
| + | Noko Meso, '''Effect'''<br/> | ||
| + | [ftp://anonymous@ragnarok.up.ac.za/publicftp/lab/Tribology/Diesel%20and%20Biodiesel%20Lubricity/2010/20100528_Report%28marked%29%28MesoN%29.pdf Final Year Project Report] | ||
| + | |||
| + | Ryan Schultz, '''Effect'''<br/> | ||
| + | [ftp://anonymous@ragnarok.up.ac.za/publicftp/lab/Tribology/Diesel%20and%20Biodiesel%20Lubricity/2010/20100528_Report%28marked%29%28SchultzR%29.pdf Final Year Project Report] | ||
Revision as of 15:16, 13 December 2010
In modern diesel engines, the fuel also fulfils the role of lubricant in the fuel distribution system. Increasingly stringent environmental legislation forces engine manufacturers to decrease the combustion temperature to limit the amount of NOx’s and SOx’s that enter the environment. To achieve this better control of injection -and combustion processes are necessary, seeing that incomplete combustion at lower temperatures will cause soot and unburnt hydrocarbons to enter the atmosphere. The introduction of common rail diesel injection technology ensured that good control was possible, but at this stage the injection pressure is about 15 times higher than it was with conventional plunger injection. The clearances between the injection equipment have also been decreased to ensure that the pressure is not lost through the system. This has placed new demands on the lubrication properties of diesel.
South African environmental legislation limits the amount of sulphur in diesel to 500ppm. The sulphur is removed through a process of hydrotreating the crude oil fractions that are used to blend diesel. The problem is that this process also removes other naturally occurring lubricity enhancing components with the sulphur. As a result of this lubricity additives need to be added to the fuel. Biodiesel (fatty acid methyl esters) have very good lubricity, but have several other limitations.
Current/Previous projects
2008
Leenesh Moodliyar, Effect of Biodiesel Addition to Lubricity of Coal-Based Diesel
Final Year Project Report
2010
Dean Riley, Effect
Final Year Project Report
Noko Meso, Effect
Final Year Project Report
Ryan Schultz, Effect
Final Year Project Report
