Synthesis, antioxidant properties, and oil solubility of a novel ionic liquid [UIM0Y2][C6H2(OH)3COO] in biodiesel

Ruizhi Li, Shuang Wang, Huicong Zhang, Fashe Li and Meng Sui

Renewable Energy, 2022, vol. 197, issue C, 545-551

Abstract: To promote the practical applications of biodiesel, an antioxidant of biodiesel is designed and synthesized in this study. The antioxidant is a 1-(2-cyanoethyl)-2-undecyl imidazole gallate ionic liquid, referred to as [UIM0Y2][C6H2(OH)3COO], which is synthesized from gallic acid (GA) and 1-(2-cyanoethyl)-2-undecyl imidazole. The synthesized samples are characterized by proton nuclear magnetic resonance (1H NMR) and Fourier transform infrared (FTIR) spectroscopy. The effects of [UIM0Y2][C6H2(OH)3COO] on the oxidation stability, metal corrosion, gum formation of Jatropha biodiesel, and oil solubility in biodiesel are also explored. The results reveal that [UIM0Y2][C6H2(OH)3COO] has an excellent oil solubility of 0.0425 g·(100 mL)−1 at 25 °C because of its non-polar structure, which is 85 times that of GA. The oxidation stability of Jatropha biodiesel is significantly improved by [UIM0Y2][C6H2(OH)3COO]. After adding 0.2‰ [UIM0Y2][C6H2(OH)3COO], the induction period of Jatropha biodiesel is enhanced by 76% and reaches the European standard (6 h). In addition, [UIM0Y2][C6H2(OH)3COO] can also inhibit the corrosion of copper and galvanized iron sheets by Jatropha biodiesel as well as the formation of gum. The amount of gum formation decreases by 37% when the concentration of [UIM0Y2][C6H2(OH)3COO] is 0.5‰. These findings indicate that [UIM0Y2][C6H2(OH)3COO] is a promising material for enhancing the oxidation stability of biodiesel.

Keywords: Biodiesel; Ionic liquids; Antioxidant; Oxidation stability; Oil solubility; Metal corrosion (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0960148122011673
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:197:y:2022:i:c:p:545-551

DOI: 10.1016/j.renene.2022.08.001

Access Statistics for this article

Renewable Energy is currently edited by Soteris A. Kalogirou and Paul Christodoulides

More articles in Renewable Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().