Journal of the Korean Applied Science and Technology (한국응용과학기술학회지)

The Korean Society of Applied Science and Technology (한국응용과학기술학회)
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Review on the oxidation stability of biodiesel

바이오디젤의 산화 안정성 특성에 관한 고찰

  • Lee, Mi-Eun (Research Institute of Petroleum Technology, Korea Petroleum Quality & Distribution Authority) ;
  • Hwang, In-Ha (Research Institute of Petroleum Technology, Korea Petroleum Quality & Distribution Authority) ;
  • Kim, Jae-Kon (Research Institute of Petroleum Technology, Korea Petroleum Quality & Distribution Authority) ;
  • Na, Byung-Ki (Department of Chemical Engineering, Chungbuk National University)
  • 이미은 (한국석유관리원 석유기술연구소) ;
  • 황인하 (한국석유관리원 석유기술연구소) ;
  • 김재곤 (한국석유관리원 석유기술연구소) ;
  • 나병기 (충북대학교 화학공학과)
  • Received : 2018.11.28
  • Accepted : 2018.12.17
  • Published : 2018.12.31
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Abstract

Biodiesel is a fuel produced in the form of a fatty acid methyl ester by using raw materials such as animal fat, vegetable oil and its by-products, and is being seen as a biofuel that can replace petroleum energy. However unsaturated fatty acid methyl esters in biodiesel causes to oxidize during storage and distribution, resulting in poor fuel quality and corrosion of vehicle engine components. In this study, the influence of quality and oxidation characteristics of biodiesel on the oxidation stability is investigated and the evaluation method related it is described. We also propose a method to improve the drawback of oxidation stability in biodiesel.

바이오디젤은 동물성 유지, 식물성 유지와 그 부산물 등의 원료를 사용하여 지방산 메틸에스테르 형태로 제조된 연료이며, 석유계 에너지를 대체할 수 있는 바이오연료로 각광받고 있다. 그러나 바이오디젤은 저장 및 유통 과정에서 불포화 지방산 메틸에스테르가 산화되면서 연료의 품질이 저하되거나 자동차 엔진부품을 부식시키는 등의 문제를 일으킨다. 따라서 본 연구에서는 바이오디젤의 품질과 산화 특성이 산화 안정성에 미치는 영향을 알아보고, 이와 관련된 평가 방법에 대해 기술하였다. 또한 바이오디젤의 산화 안정성 단점을 개선할 수 있는 방안을 고찰하였다.

Keywords

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Fig. 1. Fatty acid methyl ester molecules in biodiesel.

HGOHBI_2018_v35n4_1013_f0002.png 이미지

Fig. 2. Mechanism for the auto-oxidation of linoleic acid methyl ester leading to the formation of its hydroperoxides[4].

HGOHBI_2018_v35n4_1013_f0003.png 이미지

Fig. 3. Different oxidation products of biodiesel[4].

HGOHBI_2018_v35n4_1013_f0004.png 이미지

Fig. 5. Principle of the Rancimat method[74].

HGOHBI_2018_v35n4_1013_f0005.png 이미지

Fig. 6. The example of the Rancimat test data for rapeseed biodiesel sample, RIP=4.54 h[74].

HGOHBI_2018_v35n4_1013_f0006.png 이미지

Fig. 4. (a) Cyclohexene derivative formed by the Diels Alder reaction of linoleic acid, (b) Diels Alder reaction of linoleic acid to form the dimer[4].

Table 1. The fatty acid composition (mass%) of some biodiesel feedstocks

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Table 2. The standard value of some of the fuel parameters of biodiesel and diesel

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Table 3. The iodine value of biodiesel from different feedstocks[54,55,57]

HGOHBI_2018_v35n4_1013_t0003.png 이미지

Table 4. The peroxide value of different oils used for biodiesel production

HGOHBI_2018_v35n4_1013_t0004.png 이미지

Table 5. Summary of the analysis conditions for determination of ester content.

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Table 6. Standards to determine stability of biodiesel

HGOHBI_2018_v35n4_1013_t0006.png 이미지

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