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Biomass Chemical Engineering ›› 2020, Vol. 54 ›› Issue (1): 31-36.doi: 10.3969/j.issn.1673-5854.2020.01.005

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Preparation and Kinetic Analysis of Novel Antioxidants of Biodiesel

Yonghui WU1,2(),Fashe LI1,2,*(),Jiaxu SHEN1,2,Shuang WANG1,Wei DU1,Xuehua WU2,3   

  1. 1. Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China
    2. Ministry of Education Engineering Research Center for Energy Conservation and Emission Reduction of Metallurgy, Kunming 650093, China
    3. Faculty of Science, Kunming University of Science and Technology, Kunming 650500, China
  • Received:2018-06-11 Online:2020-01-30 Published:2020-02-11
  • Contact: Fashe LI E-mail:1758486028@qq.com;asan97@qq.com
  • Supported by:


A new antioxidant biodiesel isopropyl gallate was prepared by using gallic acid and isopropanol as raw materials, pyridine bisulfate ionic liquid as catalyst. Through the single factor analysis, the optimal reaction conditions of catalytic esterification reaction were obtained as reaction time 4 h at 85℃, the ratio of alcohol to acid 35:1, catalyst dosage 12%, the yield of isopropyl gallate under these conditions was 89.1%. Based on the catalytic esterification reaction dynamics analysis, the reaction apparent activation energy and the frequency were obtained as 60.942 kJ/mol and 7 060 313.404, respectively. The addition of 0.05% isopropyl gallate in gallate in gutter oil biodiesel significantly improved the oxidation stability, and the induction period increased from 0.61 h to 6.34 h, which completely reached the national standard for biodiesel(induction period 6 h). The experimental results showed that isopropyl gallate had good performance as new biodiesel antioxidant.

Key words: biodiesel, antioxidant, dynamics analysis, antioxidant effect

CLC Number: