Energies 2011, 4(12), 2212-2223; doi:10.3390/en4122212
Article

Biodiesel Production from Acidified Oils via Supercritical Methanol

Received: 7 November 2011; in revised form: 30 November 2011 / Accepted: 6 December 2011 / Published: 14 December 2011
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: In biodiesel production, the vegetable oil used as raw material for transesterification should be free of water and free fatty acids (FFAs), which may consume catalyst and reduce catalyst efficiency. In this work biodiesel was prepared from acidified oils (AO) through a supercritical methanol route, in which the esterification of FFAs and transesterification of glyceride with methanol occurred simultaneously. The effects of the mass ratio of methanol to AO, the operation temperature as well as the water content on the FFAs conversion and glycerol yield were investigated. The results indicated that the FFAs conversion for esterification under the condition of 1:1 methanol/oil ratio, 310 °C and 15 min reaction time reached 98.7%, and the glycerol yield for transesterification under 0.25:1 methanol/oil ratio, 290 °C and 20 min reaction time reached 63.5% respectively.
Keywords: acidified oils; biodiesel; esterification; supercritical methanol; transesterification
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MDPI and ACS Style

Ding, J.; He, B.; Li, J. Biodiesel Production from Acidified Oils via Supercritical Methanol. Energies 2011, 4, 2212-2223.

AMA Style

Ding J, He B, Li J. Biodiesel Production from Acidified Oils via Supercritical Methanol. Energies. 2011; 4(12):2212-2223.

Chicago/Turabian Style

Ding, Jincheng; He, Benqiao; Li, Jianxin. 2011. "Biodiesel Production from Acidified Oils via Supercritical Methanol." Energies 4, no. 12: 2212-2223.

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