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http://dx.doi.org/10.12925/jkocs.2015.32.4.639

A study on the Property of Oxidation Stability in Biodiesel by the Additives  

Kang, Hyung-Kyu (Research Institute of Petroleum Technology, Korea Petroleum Quality & Distribution Authority)
Song, Ho-Yong (Research Institute of Petroleum Technology, Korea Petroleum Quality & Distribution Authority)
Doe, Jin-Woo (Research Institute of Petroleum Technology, Korea Petroleum Quality & Distribution Authority)
Park, Soo-Youl (Korea Research Institute of Chemical Technology)
Na, Byung-Ki (Department of Chemical Engineering, Chungbuk National University)
Publication Information
Journal of the Korean Applied Science and Technology / v.32, no.4, 2015 , pp. 639-648 More about this Journal
Abstract
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 the increase of additives content. The TBHQ among the seven kinds of the additives showed the best performance. Also, 4 kinds of additives like propyl gallate, butyl-amine and pyrogallo has showed above 10 hr of oxidation stability at the addition of 500 ppm. In case of pyrogallo, this is not appropriate as an additive to suitable quality standards of total acid number. TBHA, DTBHQ of hydroquinone was satisfied with the quality standard of oxidation stability but the target of this research(above 10 hr) did not satisfied with oxidation stability. Propyl gallate is also a suitable at the quality standards of total acid number but it was shown not to be an appropriate to the additives due to increasing the total acid number by increasing of the content of additives at the addition of 500 ppm.
Keywords
Antioxidant; Biodiesel; TBHQ(tertiary butyl hydroquinone); Oxidative stability; Total acid number; propyl gallate; butyl-amine; aniline; pyrogallol; TBHA;
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