p-Toluenesulfonic Acid-based Deep Eutectic Solvent as Transesterification Catalyst for Biodiesel Production

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  • Liu Wei
    College of Food Science and Technology, Henan University of Technology College of Chemistry and Molecular Engineering, Zhengzhou University
  • Wang Fang
    College of Food Science and Technology, Henan University of Technology

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  • <i>p</i>-Toluenesulfonic Acid-based Deep Eutectic Solvent as Transesterification Catalyst for Biodiesel Production

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<p>In this study, acidic deep eutectic solvents (DESs) have been studied as catalyst in transesterification of soybean oil with methanol to produce biodiesel. p-Toluenesulfonic acid-based deep eutectic solvent (P-DES), composed of p-toluenesulfonic acid and choline chloride (1:3, mol/mol), was found to be an efficient transesterification catalyst for biodiesel production. The optimum conditions for the transesterification process were as follows: 8% P-DES catalyst, 8:1 molar ratio of methanol to oil, reaction temperature of 110°C and 2 h reaction time. The transesterification yield could reach 98.66±0.17%. And the P-DES exhibited as a heterogeneous catalyst after the reaction, which could be separated easily. And P-DES could remove the trace amount of by-product (glycerol) in the final biodiesel product, making this process more simple and cleaner.</p>

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