生物柴油新型抗氧化剂的制备及动力学分析

doi:10.3969/j.issn.1673-5854.2020.01.005

Abstract

Abstract:

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:

TQ35
TK63

Yonghui WU,Fashe LI,Jiaxu SHEN,Shuang WANG,Wei DU,Xuehua WU. Preparation and Kinetic Analysis of Novel Antioxidants of Biodiesel[J]. Biomass Chemical Engineering, 2020, 54(1): 31-36.

Figures/Tables 6

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References 16

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反应温度/℃ reaction temperature	拟合方程 fitting equation	反应速率常数(k) reaction rate constant	相关系数(R) correlation coefficient
75	Y=0.34664x-0.18192	0.0051292	0.98706
80	Y=0.48888x-0.31097	0.0068544	0.99167
85	Y=0.64784x-0.41318	0.0092350	0.99133
90	Y=0.41117x-0.21197	0.0059987	0.99087
95	Y=0.43838x-0.25222	0.0061967	0.98917

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Preparation and Kinetic Analysis of Novel Antioxidants of Biodiesel

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