Biodiesel Production from Acidified Oils via Supercritical Methanol

Energies

Jincheng Ding¹  Benqiao He² 

[1] College of ChemicalEngineering, Shandong University of Technology, Zibo 255049, China;State Key Laboratory of Hollow Fiber Membrane Materials and Processes, School of Material Science and Engineering, Tianjin Polytechnic University, Tianjin 300160, China; E-Mails:

关键词: acidified oils;    biodiesel;    esterification;    supercritical methanol;    transesterification;   

DOI  :  10.3390/en4122212

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2011 by the authors; licensee MDPI, Basel, Switzerland.