Article
Engineering, Chemical
Xuyang Zhao, Ying Zhan, Lihua Han, Xiaoran Sun, Tianyu Zhang, Zheng Zhao
Summary: In this study, poplar wood was pretreated using a series of basic deep eutectic solvents (DESs) based on diol. The best pretreatment effect was achieved with K: 1, 2-PG DES, which removed 89.2% of lignin and 71.6% of hemicellulose while preserving 97.5% of cellulose. This pretreatment significantly increased the reducing sugar yield to 82.5% after enzymatic hydrolysis. The characterization analysis confirmed the removal of lignin and hemicellulose, indicating the potential of K: 1, 2-PG DES for improving the industrial production of bioethanol.
Article
Biochemistry & Molecular Biology
Jiyou Yang, Yang Wang, Wanjing Zhang, Mingfei Li, Feng Peng, Jing Bian
Summary: The study found that alkaline deep eutectic solvents (ADESs) can effectively separate hemicelluloses from woody biomass, with choline chloride-monoethanolamine (C-M) being the most effective solvent. Different ADESs can extract hemicelluloses with varying degrees of branching, and significantly enhance the enzymatic digestibility of cellulose.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Agricultural Engineering
Heyin Wang, Tianying Chen, Shuangquan Yao, Yanjun Tang
Summary: This study designed polyol-based deep eutectic solvents (DESs) for bamboo pretreatment and enzymatic hydrolysis, and comprehensively evaluated the pretreatment conditions. The results showed that polyol-based DESs can promote the separation of components and saccharification of bamboo. Additionally, a xylitol-based DES was determined to have the optimal pretreatment conditions, with good recyclability performance.
INDUSTRIAL CROPS AND PRODUCTS
(2022)
Article
Chemistry, Multidisciplinary
Zhi-ao Feng, Dan Yang, Jin-jin Guo, Yu-kun Bo, Long-shan Zhao, Ming An
Summary: This study developed a green and efficient method for extracting flavonoids from Xanthoceras sorbifolia Bunge using ultra-sound-assisted natural deep eutectic solvents combined with response surface methodology. The optimal extraction conditions were determined and the yields of various flavonoids were measured. The results showed that the extraction efficiency and antioxidant activity of 1,4-butanediol-acetic acid were higher than traditional organic solvent methanol, indicating its potential as an environmentally friendly extraction solvent.
SUSTAINABLE CHEMISTRY AND PHARMACY
(2023)
Article
Agricultural Engineering
Zhe Ling, Wei Tang, Yan Su, Lupeng Shao, Peng Wang, Yuxuan Ren, Caoxing Huang, Chenhuan Lai, Qiang Yong
Summary: Using deep eutectic solvents (DESs) as pretreatment solvents, combined with microwave irradiation assistance, can improve conversion efficiency, remove lignin and hemicelluloses, and facilitate subsequent enzymatic hydrolysis.
BIORESOURCE TECHNOLOGY
(2021)
Article
Agricultural Engineering
Chen Huang, Yunni Zhan, Jinyuan Cheng, Jia Wang, Xianzhi Meng, Xuelian Zhou, Guigan Fang, Arthur J. Ragauskas
Summary: The study shows that the addition of trace AlCl3 during the enzymatic degradation process using DES can significantly enhance the degradation of hemicellulose and lignin, improving the enzymatic digestibility of pretreated plant fibers. Alkali washing is a feasible method to remove the precipitated lignin after degradation, which can significantly increase the enzymatic hydrolysis efficiency of the materials.
BIORESOURCE TECHNOLOGY
(2021)
Article
Agricultural Engineering
A. Varilla-Mazaba, J. A. Raggazo-Sanchez, M. Calderon-Santoyo, J. Gomez-Rodriguez, M. G. Aguilar-Uscanga
Summary: This study optimized the delignification of sugarcane bagasse using deep eutectic solvents (DES) and found that increasing temperature and reaction time improves lignin removal. The results demonstrated that DES is an efficient and useful method for lignin removal from lignocellulosic biomass, with the added benefit of converting cellulose into fermentable sugars.
INDUSTRIAL CROPS AND PRODUCTS
(2022)
Article
Acoustics
Qinghua Ji, Xiaojie Yu, Abu El-Gasim A. Yagoub, Li Chen, Olugbenga Abiola Fakayode, Cunshan Zhou
Summary: The study investigated the synergistic role of ultrasound and deep eutectic solvents in the fractionation of sugarcane bagasse, showing significant improvements in lignin and hemicellulose removal rates. Analytical studies revealed that the proposed pretreatment method effectively destroyed the ultrastructure of the sugarcane bagasse and reduced the cellulose crystallinity. The application of the SFUS + DES pretreatment method was able to improve the removal of lignin and hemicellulose from sugarcane bagasse.
ULTRASONICS SONOCHEMISTRY
(2021)
Article
Engineering, Environmental
Huan Chen, Chihe Sun, Yun Hu, Changlei Xia, Fubao Sun, Zhanying Zhang
Summary: This study investigates the designable diversity of ternary ChCl/Gly coordinated with various metal-salts and their effectiveness in lignocellulosic pretreatment. Different solvent properties and reaction characteristics were elucidated, showing that alkaline/acidic strengths and hydrogen-bonding forces play key roles in component fractionation. It was found that a strong alkaline ChCl/Gly-K2CO3 solvent achieved 72% delignification with significant holo-cellulose preservation, while Lewis acidic ChCl/Gly-FeCl3 (or AlCl3) removed a substantial amount of hemicellulose and lignin. Based on the lignin structural characterization, a potential reaction mechanism related to solvent properties was proposed to develop efficient ternary coordinated deep eutectic solvents.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Green & Sustainable Science & Technology
Aiping Lu, Xiaojie Yu, Li Chen, Clinton Emeka Okonkwo, Phyllis Otu, Cunshan Zhou, Qiaomin Lu, Qiaolan Sun
Summary: This study evaluated the effectiveness of a novel deep eutectic solvent (DES) composed of guaiacol (GG) and p-hydroxybenzoic acid (PB) as hydrogen bond donors, and choline chloride (ChCl) as a hydrogen bond receptor, in the structural properties and enzymatic hydrolysis of peanut shell. The ChCl-GG-PB pretreatment effectively removed hemicellulose and lignin, resulting in a significant improvement in enzymatic glycosaccharification efficiency. Furthermore, the ChCl-GG-PB pretreatment induced significant changes in structure and morphology, with the highest crystal-linity and lowest solid recovery.
Article
Energy & Fuels
Wei-Lun Lim, Ahmad Anas Nagoor Gunny, Farizul Hafiz Kasim, Subash C. B. Gopinath
Summary: This study developed a statistical model using RSM to optimize the performance of oxalic acid-choline chloride deep eutectic solvent in hydrolyzing bleached rice straw pulp and liberating cellulose nanocrystals. The most significant process parameters influencing yield were determined, and a regression model was established to predict CNC yield.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Agricultural Engineering
Guangyong Zeng, Liyi Zhang, Benkun Qi, Jianquan Luo, Yinhua Wan
Summary: Avicel cellulose was pretreated with two commonly used carboxylic acid-based deep eutectic solvents, choline chloride-lactic acid and choline chloride-formic acid. The pretreatment led to the formation of cellulose esters with lactic acid and formic acid, which was confirmed through spectroscopic analysis. Surprisingly, the esterified cellulose showed a significant decrease in enzymatic glucose yield compared to the untreated cellulose, but this reduction could be recovered by removing the ester groups through saponification. The decreased enzymatic cellulose hydrolysis may be attributed to changes in the interaction between the cellulose-binding domain of cellulase and the esterified cellulose.
BIORESOURCE TECHNOLOGY
(2023)
Article
Engineering, Chemical
Shahidah Nusailah Rashid, Adeeb Hayyan, Maan Hayyan, Mohd Ali Hashim, Amal A. M. Elgharbawy, Fazrizatul Shakilla Sani, Wan Jefrey Basirun, Vannajan Sanghiran Lee, Yatimah Alias, Alaa Kareem Mohammed, Mohamed E. S. Mirghani, M. Y. Zulkifli, Maher Rageh
Summary: This study investigates deep eutectic solvents (DESs) as potential media for enzymatic hydrolysis, examining the physicochemical properties of ammonium and phosphonium-based DESs at different molar ratios and their eutectic points. The results show that ternary DES systems could be viable lipase activators in hydrolysis reactions, with the eutectic points highly influenced by temperature variations.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2021)
Article
Engineering, Chemical
Xianwen Yue, Yuan Cao, Yuejie Wang, Huiwei Bao, Yang Xu
Summary: In this study, the effects of various deep eutectic solvents (DESs) on the extractable content of palmatine and berberine in Phellodendron chinense Schneid (PcS) were investigated using ultrasonic-assisted eutectic solvent method. Choline chloride and 1,3-propanediol were determined as the best DES through single-factor tests. The optimized extraction conditions were determined through response surface methodology, and the content of palmatine and berberine in PcS were found to be 5.421 +/- 0.283 mg/g and 15.573 +/- 0.539 mg/g, respectively. The prepared DES showed potential for the extraction of palmatine and berberine from PcS, and the optimized process conditions can serve as a reference for the green extraction of effective components from PcS.
INTERNATIONAL JOURNAL OF CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Applied
Maria Guadalupe Moran-Aguilar, Montserrat Calderon-Santoyo, Ricardo Pinheiro de Souza Oliveira, Maria Guadalupe Aguilar-Uscanga, Jose Manuel Dominguez
Summary: Biorefinery with deep eutectic solvent (DES) is an emerging processing technology that can overcome the limitations of conventional biomass pretreatments. This study evaluates the biorefinery of sugarcane bagasse (SCB) using DES formulated with choline chloride as hydrogen bond acceptor and three hydrogen bond donors: lactic acid, citric acid, and acetic acid. It was found that acetic acid has unique ionic properties that contribute to the selective removal of lignin and the deconstruction of cellulose, resulting in enhanced digestibility during enzymatic hydrolysis.
CARBOHYDRATE POLYMERS
(2022)