SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2022, Vol. 42 ›› Issue (2): 406-414.DOI: 10.1016/j.cjche.2021.01.001

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Effects of formaldehyde on fermentable sugars production in the low-cost pretreatment of corn stalk based on ionic liquids

Kaili Zhang1, Ligang Wei1, Qingqin Sun1, Jian Sun2, Kunlan Li1, Shangru Zhai1, Qingda An1, Junwang Zhang1   

  1. 1. Faculty of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China;
    2. School of Life Sciences, Advanced Research Institute of Multidisciplinary Science, Beijing Institute of Technology, Beijing 100081, China
  • Received:2020-10-15 Revised:2020-12-04 Online:2022-03-30 Published:2022-02-28
  • Contact: Jian Sun,E-mail:jiansun@bit.edu.cn;Qingda An,E-mail:anqingdachem@163.com
  • Supported by:
    This study was supported by the National Natural Science Foundation of China (21776026, 22078023) and Liaoning Revitalization Talents Program (XLYC1902037).

Effects of formaldehyde on fermentable sugars production in the low-cost pretreatment of corn stalk based on ionic liquids

Kaili Zhang1, Ligang Wei1, Qingqin Sun1, Jian Sun2, Kunlan Li1, Shangru Zhai1, Qingda An1, Junwang Zhang1   

  1. 1. Faculty of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China;
    2. School of Life Sciences, Advanced Research Institute of Multidisciplinary Science, Beijing Institute of Technology, Beijing 100081, China
  • 通讯作者: Jian Sun,E-mail:jiansun@bit.edu.cn;Qingda An,E-mail:anqingdachem@163.com
  • 基金资助:
    This study was supported by the National Natural Science Foundation of China (21776026, 22078023) and Liaoning Revitalization Talents Program (XLYC1902037).

Abstract: Low cost processing of lignocellulosic biomass is of great importance for sustainable chemistry and engineering. Herein, a low cost system composed of 1-butyl-3-methylimidazolium chloride ([C4C1im]Cl), HCl and formaldehyde (FA) was developed for the pretreatment of corn stalk at 80℃. The efficiency of this technology was compared with that in dioxane system or without FA addition. Due to FA stabilization, the extent of acid-hydrolysis of carbohydrate fraction can be significantly decreased while 70% above of lignin was removed with the pretreatment of[C4C1im]Cl/HCl/FA system at 80℃ for 2 h. A maximum reducing sugar yield of 93.7% and glucose concentration of 7.0 mg·ml-1 were subsequently obtained from enzymatic hydrolysis of the slurry. There were great differences in compositions of small molecule degraded products obtained with FA addition or not. The present[C4C1im]Cl based system exhibits great potential of substituting volatile organic solvents (i.e. dioxane) in developing low cost lignocellulosic biomass pretreatment at low temperature. Also, this work would gain insight into understanding on the roles of stabilization methods on the economic improvement of IL based biomass processing.

Key words: Ionic liquid, Formaldehyde, Low cost pretreatment, Lignocellulosic biomass, Saccharification

摘要: Low cost processing of lignocellulosic biomass is of great importance for sustainable chemistry and engineering. Herein, a low cost system composed of 1-butyl-3-methylimidazolium chloride ([C4C1im]Cl), HCl and formaldehyde (FA) was developed for the pretreatment of corn stalk at 80℃. The efficiency of this technology was compared with that in dioxane system or without FA addition. Due to FA stabilization, the extent of acid-hydrolysis of carbohydrate fraction can be significantly decreased while 70% above of lignin was removed with the pretreatment of[C4C1im]Cl/HCl/FA system at 80℃ for 2 h. A maximum reducing sugar yield of 93.7% and glucose concentration of 7.0 mg·ml-1 were subsequently obtained from enzymatic hydrolysis of the slurry. There were great differences in compositions of small molecule degraded products obtained with FA addition or not. The present[C4C1im]Cl based system exhibits great potential of substituting volatile organic solvents (i.e. dioxane) in developing low cost lignocellulosic biomass pretreatment at low temperature. Also, this work would gain insight into understanding on the roles of stabilization methods on the economic improvement of IL based biomass processing.

关键词: Ionic liquid, Formaldehyde, Low cost pretreatment, Lignocellulosic biomass, Saccharification