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Ultrasonic Pretreatment Transesterification for Solid Basic-Catalyzed Synthesis of Fatty Acid Methyl Esters

  • Original Paper
  • Published:
Journal of the American Oil Chemists' Society

Abstract

Generally, ultrasound irradiation is required throughout the reaction for fatty acid methyl esters (FAME, namely, biodiesel) production, which is energy-consuming and difficult to scale-up. In order to improve the industrial application of ultrasonic technology, a systematic study of ultrasonic pretreatment solid basic (Na2SiO3)-catalyzed transesterification for FAME production from cottonseed oil was carried out, and the effect of ultrasonic waves on the properties of Na2SiO3 catalyst was assessed by X-ray diffraction (XRD), Fourier transform Infrared (FTIR) and scanning electron microscopy (SEM) characterization of fresh and collected catalysts. An ultrasonic frequency of 30 kHz, ultrasonic power of 200 W and ultrasonic pretreatment irradiation time of 30 min was determined to guarantee a satisfactory degree of transesterification. The optimum production was achieved in the reaction system at 45 °C with methanol/cottonseed oil molar ratio 5:1, catalyst dosage 3% and stirring speed 350 rpm resulting in a FAME yield of above 97% after 60 min of reaction under mechanical stirring with the ultrasonic pretreatment process. The new process has a shorter reaction time, a more moderate reaction temperature, a less amount of methanol and catalyst than only the mechanical stirring process without essential damage to activity and the structure of catalyst. These results are of great significance for applying the ultrasonic pretreatment method to produce FAME.

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Acknowledgements

This work was partly supported by the National Natural Science Foundation of China (31601515), Agricultural Science and Technology Innovation Project of Chinese Academy of Agricultural Sciences (CAAS-ASTIP-2013-OCRI).

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Authors and Affiliations

  1. Oil Crops Research Institute of Chinese Academy of Agricultural Sciences, Wuhan, China

    Pingmei Guo, Suhuan Ma & Fenghong Huang

  2. Hubei Energy Research Center of Oil Crops and Bio-Diesel, Wuhan, 430062, China

    Pingmei Guo, Suhuan Ma & Fenghong Huang

Authors
  1. Pingmei Guo
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  2. Suhuan Ma
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  3. Fenghong Huang
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Corresponding author

Correspondence to Fenghong Huang.

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Guo, P., Ma, S. & Huang, F. Ultrasonic Pretreatment Transesterification for Solid Basic-Catalyzed Synthesis of Fatty Acid Methyl Esters. J Am Oil Chem Soc 94, 733–740 (2017). https://doi.org/10.1007/s11746-017-2980-4

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  • DOI: https://doi.org/10.1007/s11746-017-2980-4

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