NDLI: The Influence of Supercritical Carbon Dioxide (SC-CO$_{2}$) on Electrolytes and Hydrogenation of Soybean Oil

Content Provider	Springer Nature Link
Author	Yu, Dianyu Li, Xiangxin Wang, Yuqi Zou, Dezhi Hu, Lizhi Zheng, Huanyu Jiang, Lianzhou Wang, Liqi Elfalleh, Walid
Copyright Year	2017
Abstract	The electrochemical hydrogenation of soybean oil with supercritical carbon dioxide (SC-CO$_{2}$) has been studied to seek ways for substantial reduction of the trans fatty acids (TFA). The solubility of CO$_{2}$ in electrolytes and the conductivity of electrolytes were investigated using a self-made electrochemical hydrogenation reactor. The optimum hydrogenation parameters were assessed. Both the solubility of CO$_{2}$ in electrolytes and the conductivity of electrolytes increased with increasing CO$_{2}$ pressure. When the pressure reached a critical point of CO$_{2}$, the solubility of CO$_{2}$ expressed as a mole fraction was 0.42 in cathode electrolyte and 0.1 in anode electrolyte. At 8 MPa, the conductivity of electrolytes was 1.5 times higher than that at 2 MPa. When the pressure was higher than the critical point of CO$_{2}$, the solubility of CO$_{2}$ in electrolytes and the conductivity of electrolytes reached a stable value. The optimum condition for electrochemical hydrogenation of soybean oil in SC-CO$_{2}$ were reaction pressure (8 MPa), reaction temperature (48 °C), current (125 mA), agitation speed (300 rpm), and reaction time (8 h). Fatty acid profile, iodine value, and TFA content were evaluated at the optimum parameters. This investigation showed that the electrochemical hydrogenation of soybean oil in SC-CO$_{2}$ was improved. The reaction time was shortened by 4 h, and TFA content was reduced by 35.8% compared to traditional hydrogenation process.
Starting Page	993
Ending Page	1001
Page Count	9
File Format	PDF
ISSN	0003021X
Journal	Journal of the American Oil Chemists' Society
Volume Number	94
Issue Number	7
e-ISSN	15589331
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2017-06-14
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Supercritical CO$_{2}$ Solubility Conductivity Electrochemical Hydrogenation trans Fatty acids Industrial Chemistry/Chemical Engineering Biomaterials Agriculture Food Science Biotechnology
Content Type	Text
Resource Type	Article
Subject	Organic Chemistry Chemical Engineering

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