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| Investigation of antioxidant-corrosion inhibition synergism of biodiesel antioxidants |
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| DOI：10.19902/j.cnki.zgyz.1003-7969.240327 |
| KeyWord:biodiesel antioxidant oxidation induction time corrosion corrosion inhibitor |
| FundProject:国家自然科学基金项目（52166013） |
| Author Name | Affiliation | | CHEN Renyi1,2,3, SUI Meng1,3, QIN Gaian4, LI Fashe1,3, ZHAO Zhongjin1,3 | 1.School of Metallurgical and Energy Engineering, Kunming University of Science and Technology,
Kunming 650093, China
2.Grandblue Environment Co. , Ltd. , Foshan 528200, Guangdong, China
3.Engineering Research Center of Metallurgical Energy Conservation and Emission Reduction,
Ministry of Education, Kunming 650093, China
4.Guigang Solid Waste
Management Center, Guigang 537100, Guangxi, China |
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| Abstract: |
| To provide a reference for the biodiesel production enterprises to ensure the product index, three kinds of antioxidants namely butylated hydroxyanisole (BHA), 3,5-di-tert-butyl-4-hydroxytoluene (BHT), and tetraethylenepentamine (TEPA) were added to Jatropha biodiesel, respectively. Their effects on the oxidative stability and corrosivity of biodiesel were investigated. The results showed that three kinds of antioxidants improved the oxidative stability of biodiesel, with TEPA exhibiting the most significant effect. Additionally, these antioxidants displayed excellent corrosion inhibition properties. After adding 0.1%, the copper corrosion grade reached 1a, meeting national standard requirements. TEPA again showed the best corrosion inhibition performance, and at an addition level of 0.2%, the corrosion rate, inhibition efficiency, and coverage of Jatropha biodiesel were 42.76 g/(m2·h), 80.24% and 0.82, respectively. Compared with biodiesel without antioxidants, the copper content on the surface of a copper sheet corroded for 96 h in biodiesel with 0.1% TEPA increased from 69.6% to 79.2%, while carbon, oxygen, and nitrogen contents decreased by 7.9, 0.5, and 1.2 percentage points, respectively. In conclusion, TEPA can capture copper ions and form copper ion chelates to inhibit the catalytic oxidation of biodiesel, and slowing the corrosion of the copper sheet by biodiesel, thereby providing both antioxidant and corrosion inhibition effect. |
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