Preparation and optimization of macroalgae-derived solid acid catalysts

Jiménez Toro, María, Dou, Xin, Ajewole, Isaac, Wang, Jiawei, Chong, Katie J, Ai, Ning, Zeng, Ganning and Chen, Tao (2017). Preparation and optimization of macroalgae-derived solid acid catalysts. Waste and Biomass Valorization , pp. 1-12.

Abstract

Solid acid catalysts were synthesized from macroalgae Sargassum horneri via hydrothermal carbonization followed by sulfuric acid sulfonation. A three-variable Box-Behnken design and optimization was used to maximize surface acidity. The optimal preparation conditions were found to be at the carbonization temperature of 217 °C, the carbonization time of 4.6 h and the sulfonation temperature of 108.5 °C. Under these conditions, the highest surface acidity achieved was 1.62 mmol g−1. Physical and chemical properties of prepared solid acid catalyst were characterized by powder X-ray diffraction (PXRD), Fourier transform infrared (FTIR) spectroscopy, and elemental analysis. The results proved the grafting of –SO3H groups on an amorphous carbon structure. The catalyst activity was evaluated by the esterification of oleic acid with methanol. The sample prepared achieved 96.6% esterification yield, which was higher than the 86.7% yield achieved by commercial Ambersyst-15 under the same reaction conditions.

Publication DOI: https://doi.org/10.1007/s12649-017-0101-0
Divisions: Engineering & Applied Sciences
Engineering & Applied Sciences > Aston Institute of Materials Research (AIMR)
Engineering & Applied Sciences > European Bioenergy Research Institute (EBRI)
Additional Information: © Her Majesty the Queen in Right of United Kingdom 2017 Funding: Natural Science Foundation of China (LY16B060014), Zhejiang ocean economic innovation achievements transformation and industrialization of development area demonstration projects (2015-83)
Uncontrolled Keywords: Solid acid catalyst, Biomass,Hydrothermal carbonization,Esterification,Box-Behnken design
Full Text Link: https://link.sp ... 2649-017-0101-0
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Published Online Date: 2017-10-16
Authors: Jiménez Toro, María
Dou, Xin
Ajewole, Isaac
Wang, Jiawei ( 0000-0001-5690-9107)
Chong, Katie J ( 0000-0002-3800-8302)
Ai, Ning
Zeng, Ganning
Chen, Tao

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