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| Effect of the combination of TEPA and pour point depressant on the ion content of biodiesel |
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| DOI： |
| KeyWord:pour point depressant TEPA biodiesel ion content chromatography ion exchange |
| FundProject:国家自然科学基金（52166013） |
| Author Name | Affiliation | | ZHENG Yuzeng1,2,3, LI Fashe1,2,3, ZHOU Li1,2,3, WANG Wenchao1,2,3,
ZHAO Zhongjin1,2,3 | 1.School of Metallurgy and Energy Engineering, Kunming University of Science and Technology, Kunming
650093, China
2.Provincial and Ministry Co-construction of State Key Laboratory of Clean Utilization of
Complex Non-ferrous Metal Resources, Kunming 650093, China
3.Engineering Research Center of the
Ministry of Education for Metallurgical Energy Conservation and Emission Reduction, Kunming 650093, China |
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| Abstract: |
| In order to provide reference for the large-scale application of biodiesel, taking Jatropha biodiesel as the research object, the effects of five pour point depressants (Ping′anzhe, Miaosu, Yiwei, Fanxiang, Hailong), antioxidant TEPA and their complex on the ion content of biodiesel were studied by using an ion chromatography system. The pour point and oxidation stability of biodiesel with different additives were also measured. The results showed that the combination of pour point depressants with TEPA reduced the pour point and improved the oxidation induction period of biodiesel to a certain extent, among which the best antioxidant effect was the combination of TEPA and Yiwei. When the five kinds of pour point depressants were added at 0.4%, the change trend of different kinds of ion contents in the biodiesel samples were different, the content of organic acid ions changed less, the content of inorganic anions and cations decreased, NO-3, Cl-, Br -, PO3-4, NH+4, Mg2+, Ca2+ contents were markedly reduced. Among them, all the five kinds of pour point depressants reduced the NO-3 content to 0. The pour point depressant Yiwei led to the largest reduction in PO3-4 content by 4.25 mg/kg. When the dosage of TEPA was 0.05%, and the combination of TEPA and pour point depressant resulted in an increase in organic acid content and a reduction in Cl-, NO-3, PO3-4, Na+，K+, Mg2+, Ca2+ contents. The combination of TEPA and Miaosu resulted in the largest decrease of 0.87 mg/kg of Mg2+ and reduced the Ca2+, Na+, K+ and NO-3 contents by 100%. In summary, the combination of TEPA and pour point depressants can reduce the anion, alkali metal ion and alkaline earth metal ion contents of biodiesel, and also reduce the pour point of biodiesel, and improve the oxidation stability of biodiesel. |
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