STUDY ON PRETREATMENT OF GLYCYRRHIZA RESIDUE WITH DEEP EUTECTIC SOLVENTS

doi:10.19912/j.0254-0096.tynxb.2021-0673

Acta Energiae Solaris Sinica ›› 2022, Vol. 43 ›› Issue (12): 446-452.DOI: 10.19912/j.0254-0096.tynxb.2021-0673

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STUDY ON PRETREATMENT OF GLYCYRRHIZA RESIDUE WITH DEEP EUTECTIC SOLVENTS

Chen Xiaoyan¹, Wang Fan^1,2, Wang Yanling¹, Yu Qiang³, Wang Zhongming¹, Yuan Zhenhong¹

1. Guangzhou Institute of Energy Conversion, Chinese Academy of Science, CAS Key Laboratory of Renewable Energy; Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China;
3. Institute of Biomass Engineering, Key Laboratory of Energy Plants Resource and Utilization, Ministry of Agriculture and Rural Affairs, Guangdong Engineering Technology Research Center of Agricultural and Forestry Biomass, South China Agricultural University, Guangzhou 510642, China

Received:2021-06-16 Online:2022-12-28 Published:2023-06-28

低共熔溶剂对甘草渣的预处理研究

陈小燕¹, 王帆^1,2, 王艳玲¹, 余强³, 王忠铭¹, 袁振宏¹

1.中国科学院广州能源研究所,广东省新能源和可再生能源研究开发与应用重点实验室,广州 510640;
2.中国科学院大学,北京 100049;
3.华南农业大学,生物质工程研究院,农业部能源植物资源与利用重点实验室,广东省农林生物质工程技术研究中心,广州 510642

通讯作者: 余强（1983—）,男,博士、研究员,主要从事生物质解聚及转化方面的研究。yuqiang@scau.edu.cn
基金资助:
国家自然科学基金（51876206; 52276192）; 广州市重点研发项目（202103000011）

Abstract

Abstract: The solvent pretreatment of glycyrrhiza residue using deep eutectic solvents（DESs） as solvents with nine choline chloride（ChCl） as hydrogen bond donors was conducted. The effects of DESs compositions and treating conditions on chemical compositions and physical morphology were analyzed. Among alcohol DESs, glycol/ChCl shows maximal lignin removal rate of 38.33% under the pretreatment conditions of 150 ℃, 1 h. For the acidic DESs, maximal lignin removal rate of 40.87% with cellulose recovery of 95.28% is observed after the treatment by lactic acid/ChCl under the conditions of 100 ℃, 1 h. Among the basic DESs, the maximal lignin removal rate of 73.02% is achieved by ethanolamine/ChCl under the conditions of 150 ℃, 4 h. Physical characteristics analysis indicates that DES destroys intramolecular hydrogen bonds of cellulose, breaks the ester bonds between carbohydrate and lignin, increases the accessible surface area of cellulose, which is conducive for subsequent utilization.

Key words: waste utilization, lignocellulosic biomass, delignification, glycyrrhiza residue, deep eutectic solvent, physicochemical characteristics

摘要： 以甘草渣为研究对象,9种氯化胆碱为氢键供体的低共熔溶剂（DES）作为溶剂,对甘草渣进行预处理,研究不同反应温度与反应时间对甘草渣理化特性的影响。醇类DES中,乙二醇/氯化胆碱的预处理效果最好,在150 ℃,1 h条件下最大木质素脱除率为38.33%。酸类DES中,乳酸/氯化胆碱在100 ℃,1 h处理条件下木质素脱除率最高为40.87%,纤维素保留率高达95.28%。碱类DES中,乙醇胺/氯化胆碱在4 h,150 ℃处理条件下木质素脱除率最大为73.02%。物理表征结果说明,DES可破坏纤维素分子内氢键,断开碳水化合物与木质素的酯键,使纤维素可及表面积增大,有利于后续利用。

关键词: 废物利用, 木质纤维素生物质, 去木质作用, 甘草渣, 低共熔溶剂, 理化特性分析

CLC Number:

Chen Xiaoyan, Wang Fan, Wang Yanling, Yu Qiang, Wang Zhongming, Yuan Zhenhong. STUDY ON PRETREATMENT OF GLYCYRRHIZA RESIDUE WITH DEEP EUTECTIC SOLVENTS[J]. Acta Energiae Solaris Sinica, 2022, 43(12): 446-452.

陈小燕, 王帆, 王艳玲, 余强, 王忠铭, 袁振宏. 低共熔溶剂对甘草渣的预处理研究[J]. 太阳能学报, 2022, 43(12): 446-452.

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STUDY ON PRETREATMENT OF GLYCYRRHIZA RESIDUE WITH DEEP EUTECTIC SOLVENTS

低共熔溶剂对甘草渣的预处理研究

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