In situ lipase-catalyzed transesterification in rice bran for synthesis of fatty acid methyl ester

Nakyung Choi, Da Som No, Heejin Kim, Byung Hee Kim, Jieun Kwak, Jeom Sig Lee, In-Hwan Kim

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Fatty acid methyl ester (FAME) were synthesized via in situ lipase-catalyzed transesterification in rice bran without additional catalyst. With this method, FAME were synthesized directly from oil in rice bran by simply adding methanol, with the aid of rice bran lipase already existing in rice bran. The effects of temperature, molar ratio (oil in rice bran to methanol), and water content of the rice bran were investigated. The yield of FAME and the free fatty acid content were monitored as a function of reaction time. The optimum conditions were a temperature of 40 °C, a molar ratio of 1:6, and a water content of 12%. Under the optimum conditions, the FAME yield of 83.4 wt% was obtained after 12 days. To further increase the FAME yield, the transesterification was repeated using the rice bran obtained from the first transesterification. The oils in rice bran that could be converted to FAME were completely transformed throughout the repeated transesterification.

Original languageEnglish
Pages (from-to)140-146
Number of pages7
JournalIndustrial Crops and Products
Volume120
DOIs
Publication statusPublished - 2018 Sep 15

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transesterification
rice bran
rice bran oil
synthesis
methanol
water content
catalysts
fatty acid methyl esters
free fatty acids
temperature
fatty acid composition

Keywords

  • Biodiesel
  • In situ
  • Repeated transesterification
  • Rice bran lipase

ASJC Scopus subject areas

  • Agronomy and Crop Science

Cite this

In situ lipase-catalyzed transesterification in rice bran for synthesis of fatty acid methyl ester. / Choi, Nakyung; No, Da Som; Kim, Heejin; Kim, Byung Hee; Kwak, Jieun; Lee, Jeom Sig; Kim, In-Hwan.

In: Industrial Crops and Products, Vol. 120, 15.09.2018, p. 140-146.

Research output: Contribution to journalArticle

Choi, Nakyung ; No, Da Som ; Kim, Heejin ; Kim, Byung Hee ; Kwak, Jieun ; Lee, Jeom Sig ; Kim, In-Hwan. / In situ lipase-catalyzed transesterification in rice bran for synthesis of fatty acid methyl ester. In: Industrial Crops and Products. 2018 ; Vol. 120. pp. 140-146.
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AU - No, Da Som

AU - Kim, Heejin

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AU - Kwak, Jieun

AU - Lee, Jeom Sig

AU - Kim, In-Hwan

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N2 - Fatty acid methyl ester (FAME) were synthesized via in situ lipase-catalyzed transesterification in rice bran without additional catalyst. With this method, FAME were synthesized directly from oil in rice bran by simply adding methanol, with the aid of rice bran lipase already existing in rice bran. The effects of temperature, molar ratio (oil in rice bran to methanol), and water content of the rice bran were investigated. The yield of FAME and the free fatty acid content were monitored as a function of reaction time. The optimum conditions were a temperature of 40 °C, a molar ratio of 1:6, and a water content of 12%. Under the optimum conditions, the FAME yield of 83.4 wt% was obtained after 12 days. To further increase the FAME yield, the transesterification was repeated using the rice bran obtained from the first transesterification. The oils in rice bran that could be converted to FAME were completely transformed throughout the repeated transesterification.

AB - Fatty acid methyl ester (FAME) were synthesized via in situ lipase-catalyzed transesterification in rice bran without additional catalyst. With this method, FAME were synthesized directly from oil in rice bran by simply adding methanol, with the aid of rice bran lipase already existing in rice bran. The effects of temperature, molar ratio (oil in rice bran to methanol), and water content of the rice bran were investigated. The yield of FAME and the free fatty acid content were monitored as a function of reaction time. The optimum conditions were a temperature of 40 °C, a molar ratio of 1:6, and a water content of 12%. Under the optimum conditions, the FAME yield of 83.4 wt% was obtained after 12 days. To further increase the FAME yield, the transesterification was repeated using the rice bran obtained from the first transesterification. The oils in rice bran that could be converted to FAME were completely transformed throughout the repeated transesterification.

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KW - Rice bran lipase

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