SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2020, Vol. 28 ›› Issue (1): 136-142.DOI: 10.1016/j.cjche.2019.02.027

• Catalysis, Kinetics and Reaction Engineering • Previous Articles     Next Articles

Hydrolysis of mechanically pre-treated cellulose catalyzed by solid acid SO42--TiO2 in water-ethanol solvent

Xingyilong Zhang1, Houfang Lu1,2, Kejing Wu1, Yingying Liu1, Changjun Liu2, Yingming Zhu1, Bin Liang1,2   

  1. 1 Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu 610207, China;
    2 School of Chemical Engineering, Sichuan University, Chengdu 610065, China
  • Received:2019-01-14 Revised:2019-02-22 Online:2020-03-31 Published:2020-01-28
  • Contact: Kejing Wu
  • Supported by:
    Supported by the Key Program of National Natural Science Foundation of China (No. 21336008).

Hydrolysis of mechanically pre-treated cellulose catalyzed by solid acid SO42--TiO2 in water-ethanol solvent

Xingyilong Zhang1, Houfang Lu1,2, Kejing Wu1, Yingying Liu1, Changjun Liu2, Yingming Zhu1, Bin Liang1,2   

  1. 1 Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu 610207, China;
    2 School of Chemical Engineering, Sichuan University, Chengdu 610065, China
  • 通讯作者: Kejing Wu
  • 基金资助:
    Supported by the Key Program of National Natural Science Foundation of China (No. 21336008).

Abstract: An efficient catalyst SO42--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℃ for 30 min. The ball milling of cellulose and solid acid catalyst significantly enhances the cellulose hydrolysis. The high Lewis to Brönsted acid sites ratio for ST-450 induced by bidentate ligands between SO42-and TiO2 benefits high organics yield, and high total acid sites contribute to the high cellulose conversion. The large pore volume of 0.29 cm3·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 SO42-and TiO2 are considered as active acid sites for cellulose hydrolysis in water-ethanol solvents.

Key words: Cellulose, Industrial metatitanic acid, Solid acid, TiO2, Hydrolysis, Ball milling

摘要: An efficient catalyst SO42--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℃ for 30 min. The ball milling of cellulose and solid acid catalyst significantly enhances the cellulose hydrolysis. The high Lewis to Brönsted acid sites ratio for ST-450 induced by bidentate ligands between SO42-and TiO2 benefits high organics yield, and high total acid sites contribute to the high cellulose conversion. The large pore volume of 0.29 cm3·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 SO42-and TiO2 are considered as active acid sites for cellulose hydrolysis in water-ethanol solvents.

关键词: Cellulose, Industrial metatitanic acid, Solid acid, TiO2, Hydrolysis, Ball milling