Some materials of fatty acids in the biodiesel affect the physical/chemical properties like density, kinematic viscosity, total acid number and oxidation stability by forming an organic fatty acid in combination with oxygen in the air. To solve the problem of the oxidative stability of biodiesel, various kinds of antioxidant has added and analyze the characteristics of the physical/chemical property changes by the addition of antioxidant. Oxidation stability increased by
It has been known that oxygenates increase octane number of gasolines. There are MTBE and bio-ethanol known as typical oxygenates and a lot of increasing interests have been given to the researches on ETBE to alternate these oxygenates. In this study, the performance and emissions of fine particle number with changing ETBE contents and spark ignition timing in single cylinder engines have been studied. There were trends that oxygen contents and RON increased with increasing ETBE contents of gasolines. And the ignition delay became longer and the burning velocity was reduced with increasing oxygen contents. Net caloric value and RON of gasoline has affected BMEP and BSFC for various ignition timings. Knocking intensity sharply increased with advancing ignition timing, but the difference in the knocking intensity of high RON fuels was relatively low. And fine particle number emissions rapidly increased with advancing ignition timing.
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