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Language: korean

Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received September 24, 2006
Accepted January 11, 2007

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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강산성 이온성 액체에 의한 유리지방산의 에스테르화 연구

Esterification of Free Fatty Acids by Strong Acidic Ionic Liquids

김영주 이진석^† 김덕근 이영우¹ 한정식²

Young-Joo Kim Jin-Suk Lee^† Deog-Keun Kim Young-Woo Rhee¹ Jeong-Sik Han²

한국에너지기술연구원 바이오에너지센터, 305-343 대전시 유성구 장동 71-2 ¹충남대학교 화학공학과, 305-764 대전시 유성구 궁동 220 ²국방과학연구소, 305-600 대전시 유성구 유성우체국 사서함 35호

Bioenergy Research Center, Korea Institute of Energy Research, 71-2, Jang-dong, Yuseong-gu, Daejeon 305-343, Korea ¹Department of Chemical Engineering, Chungnam National University, 220, Gung-dong, Yuseong-gu, Daejeon 305-764, Korea ²Agency for Defence Development, PO Box 220, Yuseong Post Office, Yuseong-gu, Daejeon 305-600, Korea

bmjslee@kier.re.kr

Korean Chemical Engineering Research, June 2007, 45(3), 286-290(5), NONE Epub 25 June 2007

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Abstract

청정 용매로 주목받고 있는 이온성 액체를 촉매로 유리지방산을 에스테르화하여 알킬에스터로 전환하는 반응 특성에 대해 조사하였다. 본 연구에서 사용한 강산성 이온성 촉매는 BPC[AlCl3], BMIM[Bf4], BMIM[Pf6], EMIM[Ntf2], BMIM[Otf] 등 5종이었으며 이러한 이온성 액체 촉매 중 BPC[AlCl3]가 본 반응에서 가장 높은 활성을 갖는 것으로 나타났다. BPC[AlCl3]는 모사 폐식용유를 원료로 한 에스테르화 반응 시 원료에 포함된 유리지방산의 90% 이상을 반응시작 2시간 내에 에스테르로 전환시키는 것으로 나타났다. 이러한 높은 반응 효율과 반응 후 촉매의 회수의 용이성 및 처리 후 재사용이 가능하다는 장점을 고려할 때 BPC[AlCl3]를 이용하여 유리지방산이 다량 함유된 폐유지의 전처리 촉매로 활용 가능성이 높은 것으로 나타났다.

The esterification efficiency of several ionic liquids has been investigated to determine the feasibility for the conversion of free fatty acids to alkylester. Five ionic liquid catalysts having strong acidity, BPC[AlCl3], BMIM[Bf4], BMIM[Pf6], EMIM[Ntf2], BMIM[Otf], have been employed in this work. BPC[AlCl3] has the highest esterification efficiency among the ionic liquid catalysts. Over 90% conversion efficiency has been achieved in the esterification of the simulated used cooking oil by BPC[AlCl3] with two hours reaction time. Since BPC[AlCl3] has several advantages such as high esterification activity, ease of separation from reaction mixture and reusability after treatment procedure, it will be a promising catalyst for the conversion of free fatty acids to esters in waste fats.

Keywords

Esterification of Free Fatty Acids Ionic Liquid Catalysts Reusability Waste Fats Biodiesel

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