低共熔溶剂预处理杨木水解渣拆解木质素

doi:10.16085/j.issn.1000-6613.2021-2477

化工进展 ›› 2022, Vol. 41 ›› Issue (10): 5612-5618.DOI: 10.16085/j.issn.1000-6613.2021-2477

低共熔溶剂预处理杨木水解渣拆解木质素

刘乾静¹^,²(), 陈晓淼², 王芷¹^,², 史吉平²^,³, 李保国¹(), 刘莉²^,³()

^1.上海理工大学健康科学与工程学院，上海 200093
^2.中国科学院上海高等研究院，上海 201210
^3.上海有机固废生物转化工程技术研究中心，上海 200241

收稿日期:2021-12-03 修回日期:2022-02-14 出版日期:2022-10-20 发布日期:2022-10-21
通讯作者: 李保国,刘莉
作者简介:刘乾静（1996—），女，硕士研究生，研究方向为生物质转化。E-mail：liuqianjing@126.com。
基金资助:
国家重点研发计划(2019YFB1503801);上海有机固废生物转化工程技术研究中心开放课题(SERC2021C03)

Deep eutectic solvent pretreatment of poplar hydrolysis residue for lignin separation

LIU Qianjing¹^,²(), CHEN Xiaomiao², WANG Zhi¹^,², SHI Jiping²^,³, LI Baoguo¹(), LIU Li²^,³()

^1.School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
^2.Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
^3.Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, Shanghai 200241, China

Received:2021-12-03 Revised:2022-02-14 Online:2022-10-20 Published:2022-10-21
Contact: LI Baoguo, LIU Li

摘要/Abstract

摘要：

为高效去除木质纤维素中的木质素，获得富含纤维素的底物，实现木质纤维素组分的单一分离与组分全利用，制备合成了6种三元低共熔溶剂（deep eutectic solvent, DES），利用DES预处理已去除半纤维素的杨木水解渣，研究了6种低共熔溶剂对木质素去除和纤维素保留的影响，并优化获得了最佳的预处理工艺参数。结果表明，6种DES中苄基三乙基氯化铵-乙二醇-氯化铁（T-EG-Fe）的预处理效果最优，木质素去除率为80.46%，纤维素保留率为90.81%。优化得到T-EG-Fe预处理杨木水解渣最佳工艺条件为：反应固液比为1∶15，反应温度为130℃，反应时间为5h，在最优条件下预处理得到的固体残渣中纤维素质量分数为92.78%，木质素质量分数为5.33%。T-EG-Fe具有高效拆解木质素的潜力，在木质纤维素预处理过程中具有一定的应用价值。

关键词: 低共熔溶剂, 预处理, 杨木, 生物质, 酶解

Abstract:

In order to efficiently remove lignin from lignocellulose, obtain the cellulose-rich substrate and make full use of lignocellulose components, six kinds of ternary deep eutectic solvent (DES) were prepared and synthesized for pretreatment of poplar hydrolysis residue without hemicellulose. The effects of the six DESs on the lignin removal and cellulose retention were studied, and the pretreatment parameters were optimized. The results showed that among the six DESs, triethyl benzyl ammonium chloride-ethylene glycol-ferric chloride (T-EG-Fe) had the best pretreatment effect, with lignin removal rate of 80.46% and cellulose retention rate of 90.81%. The optimal conditions for T-EG-Fe pretreatment of poplar hydrolysis residue were as follows: reaction solid-liquid ratio 1∶15, reaction temperature 130℃, reaction time 5h. Under the optimal conditions, the content of cellulose and lignin in the solid residue was 92.78% and 5.33%, respectively. T-EG-Fe has the potential for lignin separation in the pretreatment process of lignocellulose.

Key words: deep eutectic solvent, pretreatment, poplar, biomass, enzymatic hydrolysis

中图分类号:

刘乾静, 陈晓淼, 王芷, 史吉平, 李保国, 刘莉. 低共熔溶剂预处理杨木水解渣拆解木质素[J]. 化工进展, 2022, 41(10): 5612-5618.

LIU Qianjing, CHEN Xiaomiao, WANG Zhi, SHI Jiping, LI Baoguo, LIU Li. Deep eutectic solvent pretreatment of poplar hydrolysis residue for lignin separation[J]. Chemical Industry and Engineering Progress, 2022, 41(10): 5612-5618.

图/表 9

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HBA	HBD	摩尔比（HBA∶HBD）	合成温度 /℃	合成时间 /h	简称
ChCl	Lac	1∶10	90	2	C-Lac
ChCl	2Cl	1∶10	90	2	C-2Cl
ChCl	EG	1∶10	90	2	C-EG
TEBAC	Lac	1∶10	90	2	T-Lac
TEBAC	2Cl	1∶10	90	2	T-2Cl
TEBAC	EG	1∶10	90	2	T-EG

HBA	HBD	摩尔比（HBA∶HBD）	合成温度 /℃	合成时间 /h	简称
ChCl	Lac	1∶10	90	2	C-Lac
ChCl	2Cl	1∶10	90	2	C-2Cl
ChCl	EG	1∶10	90	2	C-EG
TEBAC	Lac	1∶10	90	2	T-Lac
TEBAC	2Cl	1∶10	90	2	T-2Cl
TEBAC	EG	1∶10	90	2	T-EG

HBA	HBD	摩尔比（HBA∶HBD∶ FeCl₃）	合成温度/℃	合成时间/h	简称
ChCl	Lac、FeCl₃	1∶2∶0.1，1∶5∶0.1，1∶10∶0.1	90	2	C-Lac-Fe
ChCl	2Cl、FeCl₃	1∶2∶0.1、1∶5∶0.1、1∶10∶0.1	90	2	C-2Cl-Fe
ChCl	EG、FeCl₃	1∶2∶0.1、1∶5∶0.1、1∶10∶0.1	90	2	C-EG-Fe
TEBAC	Lac、FeCl₃	1∶5∶0.1、1∶10∶0.1	90	2	T-Lac-Fe
TEBAC	2Cl、FeCl₃	1∶2∶0.1、1∶5∶0.1、1∶10∶0.1	90	2	T-2Cl-Fe
TEBAC	EG、FeCl₃	1∶2∶0.1、1∶5∶0.1、1∶10∶0.1、 1∶10∶0.05、1∶10∶0.15、1∶10∶0.2	90	2	T-EG-Fe

HBA	HBD	摩尔比（HBA∶HBD∶ FeCl₃）	合成温度/℃	合成时间/h	简称
ChCl	Lac、FeCl₃	1∶2∶0.1，1∶5∶0.1，1∶10∶0.1	90	2	C-Lac-Fe
ChCl	2Cl、FeCl₃	1∶2∶0.1、1∶5∶0.1、1∶10∶0.1	90	2	C-2Cl-Fe
ChCl	EG、FeCl₃	1∶2∶0.1、1∶5∶0.1、1∶10∶0.1	90	2	C-EG-Fe
TEBAC	Lac、FeCl₃	1∶5∶0.1、1∶10∶0.1	90	2	T-Lac-Fe
TEBAC	2Cl、FeCl₃	1∶2∶0.1、1∶5∶0.1、1∶10∶0.1	90	2	T-2Cl-Fe
TEBAC	EG、FeCl₃	1∶2∶0.1、1∶5∶0.1、1∶10∶0.1、 1∶10∶0.05、1∶10∶0.15、1∶10∶0.2	90	2	T-EG-Fe

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低共熔溶剂预处理杨木水解渣拆解木质素

Deep eutectic solvent pretreatment of poplar hydrolysis residue for lignin separation

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