Biodiesel production from esterification of oleic acid by a sulfonated magnetic solid acid catalyst

Yi-Tong Wang, Xing-Xia Yang, Jie Xu, Hong-Li Wang, Zi-Bing Wang, Lei Zhang, Shao-Long Wang and Jing-Long Liang

Renewable Energy, 2019, vol. 139, issue C, 688-695

Abstract: Novel sulfonated magnetic solid acid catalysts (ZrFe-SA-SO3H) with both Bronsted and Lewis sites were synthesized, which provided both a high density of surface acidity (4.4–8.4 mmol/g) and considerable magnetization (3.7–8.1 Am2/kg). The synthesized catalysts were characterized by elemental analysis, XRD, ICP-OES, FT-IR, BET, SEM-EDX, TEM, TG-DSC, VSM and Boehm titration. The prepared catalysts were tested in the esterification of oleic acid, with high yields of biodiesel (92.7–99.5%) for the first catalytic cycle at 90 °C for 4 h. A High biodiesel yield of 90.3% was still achieved after five cycles of Zr1.0Fe1.0-SA-SO3H. A similar situation was also observed when using sodium carboxymethylcellulose (CMC) to replace SA during catalyst preparation.

Keywords: Biodiesel; Magnetization; Bronsted and Lewis sites; Esterification (search for similar items in EconPapers)
Date: 2019
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Citations: View citations in EconPapers (10)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:139:y:2019:i:c:p:688-695

DOI: 10.1016/j.renene.2019.02.111

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