TỔNG HỢP XÚC TÁC ACID BẰNG PHƯƠNG PHÁP SUNFO HÓA HẠT CARBON
Abstract
Acid catalyst C-SO3H was synthesized to replace traditional acid catalyst in order to reduce environmental impacts. The synthesis process was carried out through two steps: (i) formation of carbon particles; (ii) sulfonation of carbon to form catalyst. Glucose hydrothermal method at 180°C in 4 hours was used to generate carbon particles with size of 2-3 ?m and sulfonation of carbon particles by H2SO4 at different conditions was ultilized to create the catalyst. The results showed that reaction time and temperature strongly influenced the sulfonation process to form SO3H groups. However, carbon content in the acid solution was not significantly affected. In addition, using of the catalyst for hydrolyzing starch gave good results. The concentration of the total sugar increased with increase of concentration, temperature and reaction time. Moreover, when catalyzed by C-SO3H, the total sugar concentration was obtained at a value of 17,42 g/L that was higher than that of using 2% H2SO4 catalyst (obtained total sugar, 13,27 g/L).
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