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[1]陈 琦,刘 强,覃远航*,等.乙醇-水混合溶剂半连续水解木质纤维素的研究[J].武汉工程大学学报,2025,47(04):370-375.[doi:10.19843/j.cnki.CN42-1779/TQ.202304015]
　CHEN Qi,LIU Qiang,QIN Yuanhang*,et al.Semi-continuous hydrolysis of lignocellulose with ethanol-water mixed solvent[J].Journal of Wuhan Institute of Technology,2025,47(04):370-375.[doi:10.19843/j.cnki.CN42-1779/TQ.202304015]
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乙醇-水混合溶剂半连续水解木质纤维素的研究
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《武汉工程大学学报》[ISSN:1674-2869/CN:42-1779/TQ]

卷:
47
期数:
2025年04期
页码:
370-375
栏目:
现代大化工
出版日期:
2025-08-29

文章信息/Info

Title:
Semi-continuous hydrolysis of lignocellulose with ethanol-water mixed solvent
文章编号:
1674 - 2869（2025）04 - 0370 - 06
作者:
武汉工程大学化工与制药学院，绿色化工过程教育部重点实验室（武汉工程大学），新型反应器与绿色化学工艺湖北省重点实验室（武汉工程大学），湖北 武汉 430205
Author(s):
School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology; Key Laboratory of Green Chemical
Engineering Process of Ministry of Education (Wuhan Institute of Technology); Hubei key Laboratory of Novel Reactor and Green Chemical Technology (Wuhan Institute of Technology), Wuhan 430205, China


关键词:
Keywords:
分类号:
TM911.4
DOI:
10.19843/j.cnki.CN42-1779/TQ.202304015
文献标志码:
A
摘要:
以水为溶剂在超临界条件下水解木质纤维素制备可发酵糖的工艺因其环境友好、纤维素转化率高的优点近年来成为研究热点。但由于木质纤维素生物质结晶度高，超临界水解的温度、压力高，水解得到的还原糖在高温高压条件下容易降解，导致水解的还原糖收率普遍不高。在管式反应器中采用乙醇-水混合溶剂半连续水解杉木屑制备可发酵还原糖，对反应温度、压力、乙醇-水混合溶剂摩尔比进行了考察。发现乙醇的存在有利于降低反应条件，抑制还原糖的降解，但过高浓度的乙醇反而会降低还原糖的生成速率，产生负影响；温度的升高有利于加快反应速率，同时也加快了还原糖的降解速率。当290 ℃、15 MPa、乙醇-水混合溶剂摩尔比为1∶2的条件时，还原糖收率可达46.35%，比相同条件下在纯水中获得的水解还原糖收率高6%。
Abstract:
Hydrolysis of lignocellulose in supercritical water to produce fermentable sugars has emerged as a prominent research focus in recent years, owing to its environmental benefits and high cellulose conversion efficiency. However, the inherent crystallinity of lignocellulosic biomass and the extreme temperature/pressure requirements of supercritical hydrolysis often lead to rapid degradation of reducing sugars under such conditions, resulting in suboptimal yields. This study employed a semi-continuous tubular reactor system to hydrolyze fir sawdust using an ethanol-water mixed solvent, systematically investigating the effects of temperature, pressure, and ethanol-to-water molar ratio. Results demonstrated that ethanol addition effectively moderates reaction severity and suppresses sugar degradation, though excessive ethanol concentrations adversely impedes sugar formation. Elevated temperatures accelerate both hydrolysis kinetics and sugar degradation rates. Optimal conditions (290 ℃, 15 MPa, ethanol-to-water molar ratio of 1∶2) lead to a yield of 46.35% for reducing sugar, representing a 6% improvement over pure water hydrolysis under identical conditions.

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相似文献/References:

备注/Memo

备注/Memo:
收稿日期：2023-04-10
基金项目：国家自然科学基金（21306144）
作者简介：陈 琦，硕士研究生。Email：1065548490@qq.com
*通信作者：覃远航，博士，教授。Email：qyhsir@qq.com
引文格式：陈琦，刘强，覃远航，等. 乙醇-水混合溶剂半连续水解木质纤维素的研究［J］. 武汉工程大学学报，2025，47（4）：370-375.


更新日期/Last Update: 2025-08-29