ENERGY & FUELS
·
2020
·
IF 3.421
Xuefei Li,Dong Feng,Muyuan Chai,Shengchao Xu,Ammar Mohammedomar,Wenbo Zhao
Removal of sulfur dioxide (SO2) from flue gas by developing a highly efficient phase-change absorption solution is an effective way to tackle increasingly serious air pollution problems. In this study, the phase-change absorption behaviors of SO2 by using low cost 2-(diethylamino)ethanol (DEEA)/hexadecane as absorbent/solvent was systematically studied. The homogeneous solution could be facilely and quickly changed into two immiscible liquid phases upon introducing low partial pressure SO2. The liquid–liquid phase-change phenomenon was attributed to the formation of zwitterionic product by the reaction of DEEA with SO2, which was insoluble in low polarity hexadecane. Specifically, the absorption capacity of DEEA toward SO2 under 20 °C could reach 0.51 and 1.56 g of SO2/g of DEEA at 0.02 and 1 atm, respectively, which exhibited front-rank absorption capacity to most reported works. In addition, it was suggested that the present absorbent exhibited a highly selective absorption property and high removal efficiency of SO2. The well-matched absorbent/solvent phase-change system holds a promising application in the treatment of industrial flue gases.
研究领域:
环境科学
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化学工程
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DOI
高影响因子
ACS Catalysis
·
2025
·
IF 13.1
Shihao Li,Jiafu Shi,Yu Chen,Xinyu Mao,Shusong Liu,Yang Yang,Hong Wu,Zhongyi Jiang
Amino alcohols are widely used in chemical and pharmaceutical industries, while conventional synthesis methods face drawbacks such as low selectivity and high energy consumption. Multienzyme catalysis combined with light-driven cofactor regeneration affords a platform of light-driven synthesis of chemicals, where the transfer of electrons and protons as well as the route of enzymatic reactions dominates the energy conversion efficiency and atomic economy of carbon utilization. Herein, we construct a light-driven synthesis system comprising an energy-supplying module and a multienzyme catalytic module for 2-aminoethanol synthesis from formaldehyde and ammonia. First, a S-scheme heterojunction photocatalysts with a metal–organic framework core and a bipyridine-based conjugated polymer shell are prepared as an energy-supplying module. Through synergistic intensification of proton transfer and electron transfer, the photocatalysts render cofactor (NADH) regeneration efficiency with a turnover frequency of 30.49 h–1. Second, a multienzyme catalytic module is constructed for 2-aminoethanol synthesis in the presence of NADH. Under optimal conditions, this module produces 2-aminoethanol with an average reaction rate of 76.34 μmol L–1 h–1 within 24 h. Finally, the energy-supplying module is coupled with the multienzyme catalytic module for continuous synthesis of 2-aminoethanol from formaldehyde and ammonia, generating 0.55 mmol L–1 2-aminoethanol after 4 light–dark cycles. In addition, triethanolamine (TEOA) and glucose, a biomass-derived carbon source, are both confirmed as effective electron donors for NADH regeneration and light-driven synthesis system. This work opens a pathway for the synthesis of amino alcohols and demonstrates a paradigm for the intensification of reaction processes.
研究领域:
生物化学
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绿色化学
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产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2019
·
IF 2.298
Xiaoqin Shi,Chenxu Li,Hui Guo,Shufeng Shen
Blends of amines with alkoxyethanols have been potentially used as alternative absorbents to conventional aqueous amines for energy-efficient CO2 capture, due to the lower specific heat capacity and enthalpy of vaporization of organic solvents than water. In this work, densities and viscosities were measured at atmospheric pressure for binary liquid mixtures of 2-(methylamino)ethanol (MAE) + 2-methoxyethanol (EGME), MAE + 2-ethoxyethanol (EGEE), and MAE + 2-butoxyethanol (EGBE) over the entire composition range and at temperatures of 293.15–353.15 K. The excess molar volume and viscosity deviations were also calculated and fitted by the Redlich–Kister equation. The calculated values of density and viscosity from the proposed correlations are in good agreement with the experimental values, with average absolute relative deviations within 0.06 and 1.23% for density and viscosity, respectively. The variations of excess or deviation properties with temperature and components were also discussed in terms of intermolecular interactions and structural effects.
研究领域:
化学
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物理化学
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产品关联
DOI
高影响因子
CHEMPHYSCHEM
·
2017
·Vol. 18
·期 22
·3182-3188
·
IF 3.075
Xue-Dong Li,Qing-Wen Song,Xian-Dong Lang,Yao Chang,Liang-Nian He
Graphical Heterocycle promotion : An Ag 2 O/TMG (1,1,3,3-tetramethylguanidine) promoted substrate-driven and divergent route leads to a variety of heterocycles from propargyl alcohols, CO 2 , and 2-aminoethanols with turnover numbers up to 1260. The reaction proceeds through a cascade pathway with α-alkylidene cyclic carbonate as the intermediate. Chemical valorization of CO 2 to access various value-added compounds has been a long-term and challenging objective from the viewpoint of sustainable chemistry. Herein, a one-pot three-component reaction of terminal propargyl alcohols, CO 2 , and 2-aminoethanols was developed for the synthesis of 2-oxazolidinones and an equal amount of α-hydroxyl ketones promoted by Ag 2 O/TMG (1,1,3,3-tetramethylguanidine) with a TON (turnover number) of up to 1260. By addition of terminal propargyl alcohol, the thermodynamic disadvantage of the conventional 2-aminoethanol/CO 2 coupling was ameliorated. Mechanistic investigations including control experiments, DFT calculation, kinetic and NMR studies suggest that the reaction proceeds through a cascade pathway and TMG could activate propargyl alcohol and 2-aminoethanol through the formation of hydrogen bonds and also activate CO 2 .
研究领域:
有机化学
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绿色化学
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DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
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2015
·
IF 2.679
Dong Fu,LeMeng Wang,Pan Zhang,ChenLu Mi
The saturated solubility of CO 2 in monoethanolamine (MEA) promoted 2-diethylaminoethanol (DEAE) aqueous solution was investigated at temperatures ranging from (303.2 to 323.2) K. The mass fraction and temperature dependences of the saturated solubility and CO 2 loading are illustrated. The viscosities of both CO 2 -unloaded and CO 2 -loaded DEAE–MEA aqueous solutions were measured and then calculated by using the Weiland equation. The effects of temperature, mass fraction and CO 2 loading on viscosities are demonstrated.
研究领域:
化学工程
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环境科学
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产品关联
DOI
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2024
·
IF 6.3
Cong Yang,Xinnian Xia,Yale Xiao,Guoqing Wei,Yanbing Lu
The recycling of high-value cores from epoxy composite wastes is critical for environmental protection and sustainable development. However, the efficient degradation of epoxy resin under mild conditions remains a significant challenge due to its stable 3D crosslinked network structure. Herein, we propose an innovative strategy utilizing dual dynamic covalent bonds to achieve efficient, safe, and controlled degradation of epoxy resins in solvents. Specifically, a series of epoxy resins D x BV y /NMA containing dual dynamic covalent bonds (imine and ester bonds) were prepared by combining the bio-based epoxy monomer BV-EP, which contains imine bonds, with the commercial epoxy monomer DGEBA, followed by curing with nadic methyl anhydride (NMA). The results demonstrate that the incorporation of BV-EP maintains excellent thermomechanical properties and thermal stability in D x BV y /NMA systems. Remarkably, D 5 BV 5 /NMA achieved 100 % degradation in aminoethanol at 160 °C within just 25 min, indicating an extraordinarily high degradation efficiency. The degradation mechanism was elucidated using FTIR and 1 H NMR, revealing that both imine and ester bonds in the crosslinked structure can undergo exchange reactions with amino groups in aminoethanol. Importantly, the carbon fiber reinforced epoxy composite CF-D 5 BV 5 /NMA was also efficiently degraded in this system, allowing for recycling through a straightforward post-processing step, yielding virtually non-destructive carbon fibers (CF) and high-purity monomer 9,9-bis(4-aminophenyl)fluorene (BAPF). This work introduces a novel approach for the efficient and lossless recycling of CF from the carbon fiber reinforced epoxy composite wastes, thereby contributing to the sustainable development of the epoxy resin field.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
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2019
·
IF 2.29
Daofan Ma,Chunying Zhu,Taotao Fu,Xigang Yuan,Youguang Ma
The densities and viscosities of binary mixtures monoethanolamine (MEA) + H 2 O, 2-(Diethylamino)ethanol (DEEA) + H 2 O, MEA + DEEA and ternary mixtures MEA + DEEA + H 2 O were measured over the entire composition at temperatures ranging from (293.15 to 333.15) K and atmospheric pressure. The volumetric and viscometric properties such as excess molar volume, partial molar volume, partial molar volume at infinite dilution, apparent molar volume, viscosity deviation, molar enthalpy, molar entropy and the molar Gibbs energy of activation for viscous flow of mixtures were calculated in terms of experimental data, respectively. Furthermore, excess molar volumes were fitted by the Redlich–Kister equation for binary mixture and by Cibulka equation for ternary solution. The volumetric and viscometric properties were analyzed through the molecular structure and intermolecular interactions.
研究领域:
物理化学
·
热力学
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产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2024
·
IF 2
Xin Yin,Jing Wang,Shufeng Shen
The water-lean absorbent of dimethyl sulfoxide (DMSO)/2-(butylamino)ethanol (BAE)/H2O has recently been proposed for energy-efficient CO2 capture. The CO2/N2O analogy method can provide important fundamental data for its kinetic study. In this work, the physical solubility of N2O and CO2 in DMSO was measured in a static equilibrium cell at temperatures of (293.15–333.15) K. Solubility of N2O in BAE and the BAE/DMSO binary blends with 22.6, 34.9, and 61.8 mass % BAE was also determined. The effect of the water content on N2O solubility in the water-lean ternary blends with 61.8 mass % BAE was also discussed. The ratios of solubility of CO2 to N2O in polar solvents (i.e., DMSO and water) were found to be very close at temperatures of 323–333 K. Experimental solubility data and the ones calculated from the recommended correlation models match well with each other, with average absolute relative deviations within 0.9%.
研究领域:
化学工程
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2013
·
IF 2.004
Zhicheng Xu,Shujuan Wang,Changhe Chen
Densities of and N2O solubilities in aqueous solutions of 1,4-butanediamine (BDA), 2-(diethylamino)-ethanol (DEEA), and their aqueous mixtures were measured at (298.15, 313.15, and 333.15) K, and viscosities were measured at (298.15, 303.15, 313.15, 323.15, and 333.15) K. The experiments cover the mole fraction ranges (1.95–14.3 mol %) BDA, (2.01–19.3 mol %) DEEA, and (3.63–16.7 mol %) BDA + (2.62–22.2 mol %) DEEA in the blended solutions. The results were compared with available data in the literature. The experimental density and viscosity data were correlated using two semi empirical correlations in the literature as functions of temperature and concentration of BDA and DEEA.
研究领域:
化学工程
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物理化学
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产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
·
IF 3.573
Juan Lv,Sen Liu,Hao Ling,Hongxia Gao,Wilfred Olson,Qiang Li,Zain Ali Saleh Bairq,Zhiwu Liang
A new sulfolane/secondary amine biphasic absorbent, sulfolane/2-methylaminoethanol (MAE) solution, was developed for postcombustion CO2 capture (PCC). Surprisingly, using a 4M/5M sulfolane/MAE solution saves about 60% energy consumption (EC) for CO2 stripping when compared with traditional aqueous 5M monoethanolamine (MEA) solutions. First, we theoretically proved that MAE in sulfolane-based biphasic solution improves the CO2 absorption rate with high CO2 loading at the phase-changing point, which could be energy-saving for CO2 stripping. Based on a comprehensive comparison of the phase-changing behavior, nuclear magnetic resonance (NMR) spectra, absorption rate, and desorption performance, the 4M/5M sulfolane/MAE was determined to be the optimal molar ratio among six sulfolane/MAE biphasic solutions for CO2 capture. In addition, the absorption and desorption experiments with various temperatures revealed that relatively low temperature (ranging from 110 to 120 °C) was favorable for CO2 removal and energy-saving. Furthermore, the 4M/5M sulfolane/MAE solution achieved a very low energy consumption (EC) compared with that of 5M MEA solution, and the stripped CO2 amount is similar to that of 5M MEA and 5M MAE solutions.
研究领域:
化学工程
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2021
·
IF 6.165
Xiaoqin Shi,Shufeng Shen
Nonaqueous secondary alkanolamine-based systems, replacing conventional water with 2-alkoxyethanols as cosolvents, have recently attracted much attention for an energy-efficient CO 2 capture process. In this work, physical solubility of N 2 O and CO 2 in 2-(methylamino)ethanol (MAE), 2-methoxyethanol (2-ME) and their blends was measured and correlated at temperatures ranging from (283.2 to 333.2) K. Vapor-liquid equilibrium (VLE) data for the CO 2 + MAE + 2-ME system at 7.8, 19.4 and 39.1 mass% MAE were also measured in a stirred equilibrium cell at temperatures of (313.2–393.2) K and CO 2 partial pressures up to 270 kPa. VLE data were represented by a modified Kent-Eisenberg model with an AARD of 12.6%. The apparent equilibrium constants considering the liquid nonideality were well correlated as a function of temperature, concentration of carbamate product and CO 2 loading.
研究领域:
化学工程
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环境科学
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产品关联
DOI
高影响因子
International Journal of Greenhouse Gas Control
·
2019
·
IF 3.231
Fan Cao,Hongxia Gao,Qian Xiong,Zhiwu Liang
CO 2 absorption performance for various blended N ,N- dimethylethanolamine (DMEA) solutions in the presence of absorption promoters including Monoethanolamine (MEA), Piperazine (PZ), 2-(Ethylamino)ethanol (EAE), 2-(Methylamino)ethanol (MAE) and 2-Amino-2-methyl-1-propanol (AMP) was investigated in terms of CO 2 absorption flux by using a polytetrafluoroethylene (PTFE) hollow fiber membrane contactor. The experimental results show that the CO 2 absorption flux increases with a reasonable increase in liquid velocity, liquid temperature and total amine concentration. Also, the CO 2 absorption flux can increase by increasing gas velocity, CO 2 partial pressure but decrease with the increased lean CO 2 loading. In addition, it can be found that all of the investigated activated amines can improve the CO 2 absorption flux of aqueous DMEA solution. For fresh amine solution, the order of CO 2 absorption flux for the investigated amine blends can be ranked as: DMEA < DMEA + AMP < DMEA + MEA < DMEA + EAE < DMEA + MAE < DMEA + PZ. By contrast, for the amine solution with CO 2 loading of over 0.3 mol/mol, the order has also changed accordingly and can be ranked as: DMEA < DMEA + AMP < DMEA + EAE < DMEA + MAE < DMEA + MEA < DMEA + PZ. The DMEA + PZ mixture presents a significant improvement up to 52.44% in CO 2 absorption flux compared to that of single DMEA solution, and can be considered as a promising alternative for CO 2 capture.
研究领域:
化学工程
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环境科学
·
膜技术
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产品关联
DOI
高影响因子
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