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Abstract
A peanut shell-derived solid acid of amorphous carbon bearing SO3H, COOH, and phenolic OH groups has been prepared by a one-step process. The effects of preparation conditions on the activity of the solid acid were investigated. The catalysts were characterized by scanning electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, and thermogravimetric analysis. This catalyst showed high activity in the esterification of oleic acid with methanol. Under the optimal reaction conditions, a biodiesel yield of 98% could be obtained. Additionally, after six repeated uses, more than 95% yield of biodiesel was obtained, which indicated that the catalyst has a highly operational stability.
Additional information
Funding
This work was supported by the National Nature Science Foundation of China (No. 21006020) and the the Science and Technology Project of Hebei Province (13274314).
