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In relation to this article, we declare that there is no conflict of interest.
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Received October 15, 2020
Accepted April 23, 2021
articles 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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Esterification of free fatty acids in a rotor-stator spinning disc reactor

School of Chemical Engineering, Sichuan University, Chengdu, Sichuan 610065, P. R. China 1Sichuan Tobacco Quality Supervision and Testing Station, Chengdu, Sichuan 610041, P. R. China
lijunlab@163.com
Korean Journal of Chemical Engineering, August 2021, 38(8), 1727-1732(6), 10.1007/s11814-021-0815-3
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Abstract

Fatty acid methyl esters (FAMEs) were produced by the esterification of free fatty acids (FFA) with methanol, and sulfuric acid as the catalyst in a rotor-stator spinning disc reactor (RSSDR). The RSSDR, which shows excellent mixing efficiency and fast phase separation, was used as a novel continuous-flow esterification reactor. The influence of the variables (e.g., rotational speed, volume flow rate, rotor-stator distance, methanol-FFA molar ratio, catalyst dosage, and temperature) on esterification conversion (η) and productivity of FAMEs (PFAME) were investigated. It was found that the experimental parameters have a great impact on the η and PFAME in the RSSDR system, due to the effect of micromixing intensity and residence time distribution. Furthermore, to compare with other traditional esterification reactors, the values of η, PFAME, and PFAME per unit reactor volume (PFAME/VR) in the RSSDR were also employed to assess the performance for the production of FAMEs. It shows that the maximum values of PFAME, and PFAME/VR attained were 0.14mol/min and 3.06 X 10-2 mol/(mL min), respectively. Therefore, the RSSDR is proven to be an effective esterification reactor with high esterification conversion in comparison to conventional esterification reactors.

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