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Authors:
Michal Borecki
Michael L. Korwin-Pawlowski
Mateusz Geca
Przemyslaw Prus
Keywords: biodiesel fuel stability; diesel fuel degradation; cetane index improvers; capillary sensor; LED excited fluorescence
Abstract:
There are many standards set by national organizations and fuel producers to test and guarantee the diesel fuel stability under storage conditions. Traditional techniques for measuring fuel stability utilize oxygen–assisted degradation of heated sample submit the fuel sample to a relatively high pressure of air, temperature of the sample or a long time of examination. For example, American Society for Testing and Materials (ASTM) D4625 requires a time of up to 24 weeks of fuel exposition to air atmosphere heated up to 43°C. The degradation is evidenced by the appearance of resins and sediments. There are many different theories describing the mechanism of degradation of diesel fuels, as there are various factors that initiate and maintain the process. The stability of modern diesel fuel is mainly due to the reduction of the oxidation processes, the result of the presence of unsaturated components and components with oxygen as organic components and cetane index improvers. Therefore, the diesel fuel stability is related with the fuel composition. As a consequence of all that, fast and low-cost sensing of the stability of diesel and biodiesel fuel is important. The present paper concentrates on the construction of the capillary sensor which enables fast examination of fuel stability as a characteristic of fuel itself not of the gas atmosphere. Therefore, the fuel sample under examination is enclosed in a vessel and the degradation factor is assumed to be the UV radiation. The fuel samples used to develop the method are compositions of a classical mixture of petroleum products and the most widely used cetane improver (2-ethyl hexyl nitrate). The result is a sensor set-up based on two UV light emitting diodes, one used to stimulate degradation, the second used for signal reading.
Pages: 25 to 30
Copyright: Copyright (c) IARIA, 2017
Publication date: September 10, 2017
Published in: conference
ISSN: 2308-3514
ISBN: 978-1-61208-581-4
Location: Rome, Italy
Dates: from September 10, 2017 to September 14, 2017