Biomass Conversion and Biorefinery
·
2023
·
IF 4
Liu Yun,Wang Xueke,Hu Mingyang,Yu Yanyan
2,5-furandicarboxylic acid (FDCA), one of the most important building blocks, has attracted tremendous concerns, and the routes for FDCA synthesis from non-edible hemicellulose are of vital importance from the views of the circular economy. Herein, a multistep process towards hemicellulose-to-FDCA conversion is proposed, including hemicellulose-to-furfural conversion and sequential oxidation to furoic acid (FA), following with cesium furoate (FA-Cs) preparation and its direct carboxylation with carbon dioxide (CO 2 ). The overall conversion yield of the targeted FDCA product towards the hemicellulose-to-FDCA pathway reaches 29.6%. Many efforts are made on the direct carboxylation reaction of FA-Cs with CO 2 using Cs 2 CO 3 as a catalyst. Results show that FDCA with 56.47% yield is achieved via direct carboxylation of FA-Cs at 290 °C for 12 h with 40 mL/min of flowing CO 2 . Different from the previous reports, it is demonstrated that drying methods of FA-Cs show significant effects on the yield and properties of the targeted FDCA product. It is found that the conventional drying method is more suitable than the vacuum drying method. From the putative reaction mechanism, the roles of CO 2 and Cs 2 CO 3 are elucidated. CO 2 plays a direct role in carboxylation reaction, and excessive Cs 2 CO 3 can deteriorate FDCA yield due to the occurrence of decomposition. Interestingly, biochar generated during carboxylation reaction is a promising potential adsorbent, which can efficiently adsorb methylene blue with a removal rate of 96% and an adsorption amount of 80 mg/g. This present work can provide an integrated strategy for both hemicellulose valorization and CO 2 utilization in future.
研究领域:
化学工程
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绿色化学
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材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SEPARATION SCIENCE
·
2017
·Vol. 40
·期 24
·4805-4812
·
IF 2.557
Yifan Wang,Haiyan Li,Zhen Yang,Weijie Zhang,Jia Hua
To explore why the use of furfural as a transformer oil-paper insulation aging characteristic is problematic in real world application, we developed a method for the simultaneous determination of furfural, furoic acid, and maleic acid in transformer oil by reversed-phase vortex-assisted liquid–liquid microextraction combined with high-performance liquid chromatography. The conditions for the proposed method were optimized, and the obtained extract can be directly analyzed by high-performance liquid chromatography. The detection limits (signal-to-noise ratio = 3) of the method ranged from 1.0 to 4.6 μg/L, the enrichment factors for furfural, furoic acid, maleic acid, and fumaric acid were 4.6, 25.1, 15.6, and 17.5, respectively, and the recovery rates for three analytes (fumaric acid was undetected) range from 82.1 to 106.2%. The contents of furfural, furoic acid, and maleic acid resulted from accelerated aging of transformer insulation oil-paper were measured using the present method for the first time, and the aging samples were analyzed by liquid chromatography with mass spectrometry for the identification of furoic acid and maleic acid in the aging transformer oil samples. Using the optimal method, the target products of samples at different aging time were tracked and measured.
研究领域:
分析化学
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电力工程
✓ 已验证
DOI
高影响因子
FUEL
·
2022
·
IF 8.035
Chao Li,Jian Zhao,Huixin Tong,Xiaodong Fan,Xinjie Fang,Yuli Sha,Zhizhong Sun,Wenyi Chu
Ethyl levulinate (EL) is a key platform compound for the catalytic conversion of biomass. Ionic liquids (ILs) have attracted much attention due to their unique tunable structures and wide range of applications, a series of SO 3 H-functionalized imidazole based acidic ILs were designed and synthesized. These SO 3 H-functionalized ILs were used as the catalyst to be applied to the conversion of the wheat straw to EL. Among them, SimIL-6 exhibited good catalytic performance for the conversion of wheat straw to EL in ethanol. When the concentration of SimIL-6 was 30 mmol/L, the yield of EL could reach 20.1 wt% at 180 ℃ for 2 h. Furthermore, SimIL-6 as the catalyst was reused at least six times without significant reduction in catalytic efficiency. This work shed light on a new approach towards the full utilization of biomass and efficient degradation of biomass to EL.
研究领域:
化学工程
·
生物质能
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2015
·
IF 3.52
Lincai Peng,Xueying Gao,Keli Chen
The use of various aluminum salts as acid catalysts was compared in terms of catalytic upgrading of renewable furfuryl alcohol in hot ethanol medium. The commercially available AlCl 3 was emerged as a simple, cheap, and efficient catalyst for the synthesis of ethyl levulinate. From this study, four significant parameters including AlCl 3 dosage, furfuryl alcohol concentration, temperature, and time were evaluated and modeled to determine the optimal combination via response surface methodology with a central composite rotatable design. All parameters influenced the formation of ethyl levulinate—the maximum yield was 95.7% (100% furfuryl alcohol conversion). AlCl 3 could be recovered efficiently and reused multiple times without substantial loss of its catalytic activity. Moreover, AlCl 3 as the catalyst with optimized conditions was appropriate for the alcoholysis of furfuryl alcohol in other linear alcohols to afford equally high yields of the corresponding alkyl levulinates.
研究领域:
化学工程
·
可再生能源
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催化科学
✓ 已验证
产品关联
DOI
高影响因子
CELLULOSE
·
2019
·Vol. 27
·期 3
·1451-1463
·
IF 3.917
Zhou Lipeng,Gao Dongting,Yang Jingru,Yang Xiaomei,Su Yunlai,Lu Tianliang
Abstract Conversion of cellulose to chemicals is an economic and environmental route for biomass utilization. In this work, efficient conversion of cellulose to alkyl levulinates and levulinic acid was realized by oxidation pretreatment combined with alcoholysis over Al 2 (SO 4 ) 3 catalyst. Proper pre-oxidation conditions including oxidation temperature and time are important. By pre-oxidation, part of hydroxymethyl groups on cellulose was converted to carboxyl groups which provide the Brønsted acid sites near the glycosidic bonds to improve the depolymerization of cellulose to monosaccharide. Al 2 (SO 4 ) 3 ·18H 2 O can play both Brønsted and Lewis acid roles in methanol and catalyze the conversion of monosaccharide to alkyl levulinates and levulinic acid. After pre-oxidation at optimized conditions, cellulose can be converted into methyl levulinate and levulinic acid over Al 2 (SO 4 ) 3 in methanol efficiently, and total yield of methyl levulinate and levulinic acid can reach 66.8% at 180 °C for 3 h. Furthermore, the simple and cheap Al 2 (SO 4 ) 3 catalyst is recyclable which is important for the practical application. Graphic abstract
研究领域:
生物化学
·
可再生资源化学
✓ 已验证
产品关联
DOI
高影响因子
RENEWABLE ENERGY
·
2017
·
IF 4.357
Jie Liu,Xue-Qian Wang,Bei-Bei Yang,Chun-Ling Liu,Chun-Li Xu,Wen-Sheng Dong
Tin-exchanged montmorillonite catalysts were prepared by an ion exchange method and examined as solid acid catalysts . The synthesized catalysts were characterized by X-ray fluorescence spectroscopy, inductively coupled plasma optical emission spectroscopy , N 2 adsorption–desorption analysis, powder X-ray diffraction, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, NH 3 temperature-programmed desorption analysis, and pyridine adsorption Fourier transform infrared spectroscopy. Subsequently, the catalysts were examined for use in the conversion of glucose into methyl levulinate in methanol. A high yield of methyl levulinate of 59.7% was obtained upon conversion of 0.3 g glucose in 24 g methanol over 0.15 g catalyst at 220 °C under 2 MPa N 2 for 6 h. The recyclability of the catalyst was also examined, and the conversions of glucose and methanol remained mostly unchanged under repeated usage of the catalyst in five catalytic runs; in contrast, the yield of methyl levulinate decreased slightly. The excellent catalytic performance of the tin-exchanged montmorillonite catalyst was attributed to a combination of the presence of a large amount of acidic sites and balanced amounts of Lewis and Brønsted acid sites on the catalyst.
研究领域:
化学工程
·
催化科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Chun Chang,Shijie Wang,Pengkun Guo,Guizhuan Xu,Xiaoyang Zheng,Chaojun Du,Youzhou Jiao
Increasing efforts have been devoted to the production of bio-based chemicals from high solid content of renewable biomass to pursue optimal process efficiency and economics. In this study, the preparation of methyl levulinate (ML) by metal sulfate-catalyzed methanolysis from high solid content of cellulose was investigated. When the cellulose loading was 15%, 38.67% of ML yield can be obtained under the optimum reaction conditions. Al 2 (SO 4 ) 3 can be reused more than five times while maintaining high activity in the process. The characterization of cellulose particles confirmed that cellulose particles shrunk over the reaction time. The heterogeneous degradation kinetics of high solid content of cellulose in methanol could be explained by a shrinking core model. High solid loadings led to a decrease of the reaction rate constants of methanolysis. Using cellulose with a small particle size can improve the methanolysis reaction rate. The study also proposed comprehensive reaction pathways for ML production from high solid content of cellulose. To elucidate the methanolysis mechanism, an assessment of density functional theories for the calculation of glucose methanolysis at the molecular level is presented. All these results can inspire the development of ML synthesis technology through methanolysis from renewable biomass with high solid loadings.
研究领域:
生物化学
·
可再生资源工程
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2024
·
IF 13
Haoyu Feng,Weihua Zhou,Zhuo Chen,Ziming Wan,Jian Wang,Lin Sheng,Lun Zhang,Shuaipeng Hao,Hongzhen He,Hao Gu,Feng Ryan Wang,Zhangxiang Hao,Junrun Feng
Aqueous zinc ion batteries (AZIBs) are renowned for their exceptional safety and eco-friendliness. However, they face cycling stability and reversibility challenges, particularly under high-rate conditions due to corrosion and harmful side reactions. This work introduces fumaric acid (FA) as a trace amount, suitable high-rate, multifunctional, low-cost, and environmentally friendly electrolyte additive to address these issues. FA additives serve as prioritized anchors to form water-poor Inner Helmholtz Plane on Zn anodes and adsorb chemically on Zn anode surfaces to establish a unique in situ solid-electrolyte interface. The combined mechanisms effectively inhibit dendrite growth and suppress interfacial side reactions, resulting in excellent stability of Zn anodes. Consequently, with just tiny quantities of FA, Zn anodes achieve a high Coulombic efficiency (CE) of 99.55 % and exhibit a remarkable lifespan over 2580 hours at 5 mA cm −2 , 1 mAh cm −2 in Zn//Zn cells. Even under high-rate conditions (10 mA cm −2 , 1 mAh cm −2 ), it can still run almost for 2020 hours. Additionally, the Zn//V 2 O 5 full cell with FA retains a high specific capacity of 106.95 mAh g −1 after 2000 cycles at 5 A g −1 . This work provides a novel additive for the design of electrolytes for high-rate AZIBs.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2017
·Vol. 41
·期 5
·2090-2097
·
IF 3.269
Dongshun Deng,Yaotai Jiang,Xiaobang Liu
A series of furoate anion-functionized ionic liquids (ILs) were synthesized and applied as new absorbents for SO2. Results showed that these ILs possessed satisfactory performance for SO2 absorption. At 293.15 K, the maximum absorption capacity was 0.69 and 0.24 g SO2 per g P4442[FA] under 1.0 and 0.1 bar, respectively. The SO2 enriched ILs were easily regenerated by bubbling N2 at 343.15 K and recycled five times without obvious loss of absorption performance. The influences of temperature, SO2 partial pressure, and water content in ILs on SO2 absorption performance were systematically explored. The absorption capacity of ILs is discussed from aspects of the structure of cations, anions, and the interaction of cation–anion. The absorption mechanism was analyzed using NMR and FTIR methods. The selectivities of SO2/CO2, SO2/N2 and SO2/O2 were studied and [P4442][FA] achieved relatively high selectivity for SO2 compared to other gases. Present furoate ILs demonstrate potential application as a SO2 absorbent owing to their good performance.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN JOURNAL OF PHARMACEUTICAL SCIENCES
·
2025
·
IF 4.7
Min Feng,Wei Gong,Xin Zhu,Juan Zhu,Junjie Hu,Weihua Xu,Zhichao Ma,Shengmiao Fu,Xinping Chen
As the world's only commercially available paclitaxel liposome, Lipusu (Lip) has been clinically used in chemotherapy for >20 years, but the design concept of Lip remains largely unchanged since its initial development. Based on the study of Acetyl-CoA-carboxylase 1 (ACC1) in nasopharyngeal carcinoma (NPC), we proposed the concept of next-generation liposomes (NGL) utilizing lipid demand balance. In this study, we evaluated the feasibility of ACC1 and integrin α V β 3 as NPC targets, and designed 10 conjugates of 5-tetradecyloxy-2-furoic acid (TOFA) and c(RGDfK) that can bind to Lip. Considering the results of chemical parameter prediction, molecular docking, molecular dynamics simulation (MD) and other aspects, we finally selected and synthesized the compound F, and successfully constructed F-Lip by simple incubation method. Compared with Lip, F-Lip showed stronger toxicity in both HONE-1 cells and corresponding tumor-bearing mice. In conclusion, by regulating the balance of lipid demand, the toxicity of Lip can be improved so as to achieve the goal of inhibiting the proliferation of NPC. This study provides a new model for the future design and development of Lip.
研究领域:
肿瘤学
·
药理学
·
分子生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Lulu Dong,Tiefeng Xu,Junming Dai,Wenxing Chen,Wangyang Lu
Under dual pressures of energy scarcity and environmental pollution, the biobased polyester poly(ethylene furanoate) (PEF) is poised to dominate the industry in the future, overtaking conventional petroleum-based polyesters. Nonetheless, PEF discoloration is a critical impediment to its commercial success. Esterification reaction of 2,5-furandicarboxylic acid (FDCA) and ethylene glycol (EG) was developed at varying temperatures, yielding esterified products exhibiting varying degrees of discoloration. The main compounds and minor impurities in all esterified samples were accurately separated and identified using ultrahigh-performance liquid chromatography/high-definition mass spectrometry (UPLC-HDMS) techniques. The chemical structure of the yellowing component was determined by secondary mass spectrometry (MS/MS), Fourier transform infrared (FTIR) spectrometry, and a nuclear magnetic resonance (NMR) spectrometer. It can be concluded that different forms of decarboxylated byproducts were produced during esterification and polycondensation, which resulted in the discoloration of PEF. At the same time, decarboxylated byproducts were also present in alcoholysis products of commercial brown PEF chips but absent in alcoholysis products of commercial white PET chips. These results clearly demonstrate a direct relationship between PEF discoloration and decarboxylation. Overall, this work offers theoretical support and insights for future research into PEF discoloration, establishing a solid foundation for further development and application.
研究领域:
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL PHYSICS
·
2024
·
IF 2
Ronghua Zhang,Shikun He,Fei Wang,Bo Cai,Junfeng Feng,Hui Pan
Porous bi-functional catalsyts consisting of metals and zeolites are used as solid acid catalysts, characterized by octahedral morphology and good stability. In this work, a series of bifunctional catalysts (xZr-HY) with Lewis and Brønsted acid sites were prepared by a simple impregnation method, and used for the conversion of glucose to levulinic acid and methyl levulinate. The catalysts were characterized using different methods of physical and chemical properties. The analysis results showed that these catalysts existed in tetrahedral form with good pore structure , suitable acid strength and acidity. Using 10Zr-HY as the catalyst, 43.0 % yield of LA and ML could be obtained at 200 ℃ for 2.5 h. In addition, this catalytic system also gave high LA and ML yields from other biomass carbohydrates. Meanwhile, the 10Zr-HY catalyst had good stability and reusability after four cycles. This catalyst has the potential to convert biomass into high value-added platform compounds.
研究领域:
催化化学
·
生物质能
·
绿色化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）