| Summary: | 碩士 === 國立臺灣科技大學 === 機械工程系 === 96 === This thesis evaluated tribological performance of soybean and canola biodiesel by using TE-77 reciprocating sliding wear tester with cylinder-on-plate contact mode. The two kinds of biofuel will be added into the commercial superdiesel respectively and it blended B1、B2 and B20. The wear condition of biodiesel was estimated under different concentration, temperature and sliding velocity. After wear test, specimen used field emission-scanning electron microscope(FE-SEM)、energy dispersive spectrometer(EDS) and auger electron spectroscopy/electron spectroscopy for chemical analysis(AES/ESCA)to analyze wear surface and compound of chemical reaction film.
The experimental results show that B20 soybean biodiesel has best behaviour of friction and wear. Under linear heating (30~120℃) condition, wear surface revealed serious adhesive wear and delamination except specimen of B20. Furthermore, biodiesel displayed poor antiwear property as a result of acid to raise after decay in the same experimental condition. Using similar tribological conditions for canola biodiesel, which observable increase in wear width was observed because of corrosional wear arose from metal surface.
Besides, the failure analysis for fuel pump results show that using biodiesel choked clearance of engine parts by friction polymer to result in starvation lubrication; Moreover, maybe biodiesel was not all blended yet or foreign body made failure.
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