SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2023, Vol. 58 ›› Issue (6): 195-204.DOI: 10.1016/j.cjche.2022.11.010

• Full Length Article • 上一篇    下一篇

Effect of acid-associated mechanical pretreatment on the hydrolysis behavior of pine sawdust in subcritical water

Wei Yang1, Yalun Ma1, Xu Zhang2, Fan Yang1, Dong Zhang3, Shengji Wu1, Huanghu Peng1, Zezhou Chen1, Lei Che1   

  1. 1. College of Engineering, Huzhou University, Huzhou 313000, China;
    2. School of Science and Engineering, Huzhou College, Huzhou 313000, China;
    3. College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China
  • 收稿日期:2022-06-16 修回日期:2022-11-01 出版日期:2023-06-28 发布日期:2023-08-31
  • 通讯作者: Xu Zhang,E-mail:zhangxu@zjhzu.edu.cn;Shengji Wu,E-mail:wu_shengji@hotmail.com
  • 基金资助:
    This work was supported by the National Natural Science Foundation of China (22078225) and the Natural Science Foundation of Zhejiang Province (LGF22E080025 and LHY22E080005). We also thank Mr. Cunbang Zheng in Hangzhou Alltest Biotech. Co., Ltd for designing the hydrolysis mechanism of pine sawdust.

Effect of acid-associated mechanical pretreatment on the hydrolysis behavior of pine sawdust in subcritical water

Wei Yang1, Yalun Ma1, Xu Zhang2, Fan Yang1, Dong Zhang3, Shengji Wu1, Huanghu Peng1, Zezhou Chen1, Lei Che1   

  1. 1. College of Engineering, Huzhou University, Huzhou 313000, China;
    2. School of Science and Engineering, Huzhou College, Huzhou 313000, China;
    3. College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China
  • Received:2022-06-16 Revised:2022-11-01 Online:2023-06-28 Published:2023-08-31
  • Contact: Xu Zhang,E-mail:zhangxu@zjhzu.edu.cn;Shengji Wu,E-mail:wu_shengji@hotmail.com
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (22078225) and the Natural Science Foundation of Zhejiang Province (LGF22E080025 and LHY22E080005). We also thank Mr. Cunbang Zheng in Hangzhou Alltest Biotech. Co., Ltd for designing the hydrolysis mechanism of pine sawdust.

摘要: The effects of sulfuric acid-associated mechanical pretreatment on the hydrolysis behavior of pine sawdust were investigated in this study. Sulfuric acid could act as an acidic catalyst to depolymerize holocellulose through cleavage of the glycosidic bonds, the dissociation energies of which were supplied by the impact of a ball on pine sawdust, during milling. The destruction of glycosidic and hydrogen bonds in pine sawdust resulted in a decrease of crystallinity and an increase of water solubility. The sulfuric acid could promote the hydrolysis of holocellulose and its hydrolysis products. It also destroyed the chemical linkages between holocellulose and lignin during ball milling. The cleavage of chemical linkages with holocellulose made lignin more difficult to hydrolyze in subcritical water, and higher activation energy was needed to hydrolyze pretreated pine sawdust at higher reaction temperatures. It also led to the formation of glucose char and aromatic-linked polymer char from the hydrolysis products of holocellulose.

关键词: Acid-associated mechanical pretreatment, Subcritical water, Pine sawdust, Hydrolysis behavior, Kinetic parameters

Abstract: The effects of sulfuric acid-associated mechanical pretreatment on the hydrolysis behavior of pine sawdust were investigated in this study. Sulfuric acid could act as an acidic catalyst to depolymerize holocellulose through cleavage of the glycosidic bonds, the dissociation energies of which were supplied by the impact of a ball on pine sawdust, during milling. The destruction of glycosidic and hydrogen bonds in pine sawdust resulted in a decrease of crystallinity and an increase of water solubility. The sulfuric acid could promote the hydrolysis of holocellulose and its hydrolysis products. It also destroyed the chemical linkages between holocellulose and lignin during ball milling. The cleavage of chemical linkages with holocellulose made lignin more difficult to hydrolyze in subcritical water, and higher activation energy was needed to hydrolyze pretreated pine sawdust at higher reaction temperatures. It also led to the formation of glucose char and aromatic-linked polymer char from the hydrolysis products of holocellulose.

Key words: Acid-associated mechanical pretreatment, Subcritical water, Pine sawdust, Hydrolysis behavior, Kinetic parameters