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Hydrolysis of mechanically pre-treated cellulose catalyzed by solid acid SO4^2--TiO2 in water–ethanol solvent 被引量:6
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作者 xingyilong zhang Houfang Lu +4 位作者 Kejing Wu Yingying Liu Changjun Liu Yingming Zhu Bin Liang 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2020年第1期136-142,共7页
An efficient catalyst SO4^2--TiO2(ST) from industrial metatitanic acid has been successfully prepared to catalyze hydrolysis of ball-milling cellulose. The results show that the highest catalytic efficiency is obtaine... An efficient catalyst SO4^2--TiO2(ST) from industrial metatitanic acid has been successfully prepared to catalyze hydrolysis of ball-milling cellulose. The results show that the highest catalytic efficiency is obtained for ST calcined at 450 ℃(ST-450) with the yield of 21.8% glucose, 13.0% 5-HMF and 4.2% furfural at 200 ℃ for30 min. The ball milling of cellulose and solid acid catalyst significantly enhances the cellulose hydrolysis. The high Lewis to Bronsted acid sites ratio for ST-450 induced by bidentate ligands between SO4^2-and TiO2 benefits high organics yield, and high total acid sites contribute to the high cellulose conversion. The large pore volume of 0.29 cm^3·g^-1 and appropriate pore size of 7.35 nm of ST-450 also contribute to the high performance. High reaction temperature over 200 ℃ exhibits negative effect on glucose and 5-HMF yield due to undesired side reactions, while furfural product is stable in the reaction system. The bidentate ligands between SO4^2-and TiO2 are considered as active acid sites for cellulose hydrolysis in water–ethanol solvents. 展开更多
关键词 CELLULOSE Industrial metatitanic ACID Solid ACID TiO2 HYDROLYSIS Ball MILLING
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