Effect of TEPA/TBHQ combination on oxidative stability-corrosion of biodiesel

被引：0
|
作者：
He X. [1 ,2 ,3 ]
Chen R. [4 ]
Liu M. [4 ]
Li H. [1 ]
Li F. [1 ,2 ,3 ]
Zhang H. [1 ,2 ,3 ]
机构：
[1] Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Yunnan, Kunming
[2] State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Yunnan, Kunming
[3] Engineering Research Center of Metallurgical Energy Conservation and Emission Reduction Ministry of Education, Yunnan, Kunming
[4] Hanlan Green Electric Solid Waste Treatment (Foshan) Co., Ltd., Guangdong, Foshan
来源：
Huagong Jinzhan/Chemical Industry and Engineering Progress | 2023年 / 42卷 / 11期
关键词：
antioxidation; corrosion inhibition; liquid fuel; oxidation-corrosion inhibitor; tert-butylhydroquinone (TBHQ); tetraethylenepentamine (TEPA);
D O I：
10.16085/j.issn.1000-6613.2022-2240
中图分类号：
学科分类号：
摘要：
Biodiesel is a green low-carbon liquid fuel. Poor oxidation stability and tendency to corrode metals limit its large-scale application. In this study, tetraethylenepentamine (TEPA) and tert-butylhydroquinone (TBHQ) were compounded to an highly effective inhibitor of oxidation-corrosion taking Jatropha biodiesel as the object of study. The Rancimat method, scanning electron microscope and other characterization methods were used to investigate the effect and mechanism of the oxidation-corrosion inhibitor on the oxidation stability and corrosion performance of biodiesel. The results showed that the oxidation induction period was increased from 4.24h to 7.83h by adding 0.1% inhibitor with the ratio of 4∶1 oxidation-corrosion into Jatropha biodiesel. Meanwhile, it had better corrosion inhibition. The corrosion grade on a copper strip of biodiesel was decreased from 3a to 1a, the carbon element on the surface of the copper strip was reduced from 10.5% to 8.5%, and the oxygen element was decreased from 10% to 0. TEPA chelated Cu2+, and TBHQ provided H radicals to interrupt the biodiesel auto-oxidation chain reaction. TEPA could provide H radicals to restore and regenerate the used TBHQ. The combination of the two had a good synergistic effect, which could improve biodiesel oxidative stability and corrosion. This study provided theoretical support for the large-scale application of biodiesel. © 2023 Chemical Industry Press. All rights reserved.
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页码：5661 / 5668
页数：7
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