期刊
JOURNAL OF THE AMERICAN OIL CHEMISTS SOCIETY
卷 92, 期 4, 页码 495-502出版社
SPRINGER
DOI: 10.1007/s11746-015-2621-8
关键词
Biodiesel; Solid acid; Esterification; Transesterification; beta-Cyclodextrin
资金
- Natural Science Foundation of Guangdong [S2011040001667]
- National Natural Science Foundation of China [21306061]
- National High Technology Research and Development Program 863 [2009AA064401]
- Fundamental Research Funds for the Central Universities [11612328]
A novel carbon solid acid catalyst was prepared by incomplete hydrothermal carbonization of beta-cyclodextrin into small polycyclic aromatic carbon sheets, followed by the introduction of -SO3H groups via sulfonation with sulfuric acid. The physical and chemical properties of the catalyst were characterized in detail. The catalyst simultaneously catalyzed esterification and transesterification reactions to produce biodiesel from high free fatty acid (FFA) containing oils (55.2 %). For the as-prepared catalyst, 90.82 % of the oleic acid was esterified after 8 h, while the total transesterification yield of high FFA containing oils reached 79.98 % after 12 h. By contrast, the obtained catalyst showed comparable activity to biomass (such as sugar, starch, etc.)-based carbon solid acid catalyst while Amberlyst-15 resulted in significantly lower levels of conversion, demonstrating its relatively high catalytic activity for simultaneous esterification and transesterification. Moreover, as the catalyst can be regenerated, it has the potential for use in biodiesel production from oils with a high FFA content.
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