Journal of the Korean Applied Science and Technology (한국응용과학기술학회지)

The Korean Society of Applied Science and Technology (한국응용과학기술학회)
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A study on the Property of Oxidation Stability in Biodiesel by the Additives

첨가제에 따른 바이오디젤 산화안정 특성 연구

  • 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)
  • 강형규 (한국석유관리원 석유기술연구소) ;
  • 송호영 (한국석유관리원 석유기술연구소) ;
  • 도진우 (한국석유관리원 석유기술연구소) ;
  • 박수열 (한국화학연구원) ;
  • 나병기 (충북대학교 화학공학과)
  • Received : 2015.10.06
  • Accepted : 2015.12.21
  • Published : 2015.12.30
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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.

바이오디젤은 지방산 중의 일부물질이 대기중의 산소와 결합하여 유기지방산 등을 형성하며 밀도, 동점도, 전산가, 산화안정도 등의 물성 특성에 영향을 준다. 바이오디젤의 산화안정성 문제를 해결하기 위해 바이오디젤에 다양한 산화방지제를 첨가하여 물성 변화의 특성을 분석하였다. 첨가제의 함량이 증가함에 따라 산화안정도는 증가하는 경향을 나타내고 대부분 첨가량에 비례적으로 증가하였다. 7종의 첨가제 중 TBHQ가 가장 우수한 성능을 보이며 propyl gallate, butyl-amine, aniline, pyrogallol 등 4종의 첨가제도 목표치인 500 ppm 첨가 시 10시간 이상의 성능을 보였다. pyrogallol이 전산가에서 품질기준에 부적합하여 첨가제로서 적절하지 않은 것으로 나타났으며, hydroquinone계열의 TBHA, DTBHQ는 산화안정도에서 품질기준은 만족하나 연구과제의 목표치인 10 시간 이상에 미치지 못하는 결과를 보여 개발 첨가제로서는 결함이 있는 것으로 판단하였다. 또한 propyl gallate도 전산가에서 품질기준에 적합하나 500 ppm 첨가 시 수치가 높고 첨가제 증가에 따른 전산가 증가 경향이 커서 첨가제로서 부적합한 것으로 판단하였다.

Keywords

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