JOURNAL OF CHEMICAL THERMODYNAMICS
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2021
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IF 3.178
Xiaoqin Shi,Yu Dong,Shufeng Shen
Nonaqueous blends of alkanolamines with 2-alkoxyethanols have recently attracted much attention for an energy-efficient CO 2 capture process. In this work, densities and viscosities of partially CO 2 -loaded mixtures of 2- (methylamino)ethanol (MAE) with 2-methoxyethanol (EGME), 2-ethoxyethanol (EGEE) and 2-butoxyethanol (EGBE) were measured at atmospheric pressure over the temperature range of (293.15 to 353.15) K with amine mass fractions of (0.10, 0.30 0.40 and 0.50) containing various CO 2 loading. It was observed that both densities and viscosities of the carbonated solutions showed noticeable changes as increasing CO 2 loading, amine concentration and temperature. Dimensionless parameters from the CO 2 -free and CO 2 -loaded property data were fitted by proposed correlations. The calculated values of density and viscosity from the correlation models matched well with the experimental results of MAE + CO 2 + 2-alkoxyethanols, with AARDs within 0.28% and 2.20% for density and viscosity respectively. These results are useful to evaluate the mass transfer and hydrodynamic performance in a CO 2 capture process using these nonaqueous absorbents.
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
DYES AND PIGMENTS
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2023
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IF 4.5
Yunpeng Wang,Tao Zhao,Xiaoye Bi,Chencheng lv
Week interactions between traditional dye molecules and synthetic fibers requires addition of numerous chemical additives during the dyeing process, resulting in the generation of a significant amount of printing and dyeing wastewater, thereby causing environmental pollution. Herein, three novel carbene dyes containing diazirine were rationally designed, whose decomposition into carbenes at 145 °C subsequently forms covalent bonds with the C–H bonds present in the fibers. The structure-property relationships of the dyes were analyzed based on the results of density functional theory (DFT) calculations. Additionally, the calculations of Yoshida correlations demonstrated that all three dyes exhibit non-explosive properties, thereby indicating their feasibility for large-scale production. The dyeing process of polyester (polyethylene terephthalate/PET), polypropylene (PP), aramid, spandex, and polyester/spandex (P/S) blended fabrics was performed using a non-aqueous solvent dyeing method without the addition of any additives, and the optimal dyeing and color fixation conditions were determined. The samples dyed with carbene dyes displayed similar K/S values compared to conventionally dyed samples, higher color fixation rates, and improved blended dyeing effects, and the reaction mechanism between the carbene dyes and the fibers was elucidated, which proved the versatility and environmental friendliness of the novel carbene dyes and non-aqueous solvent dyeing method. Furthermore, it is noteworthy that all of these dyed fabrics exhibited exceptional color fastness, highlighting the immense potential of the novel carbene dyes in promoting green production in the textile industry.
研究领域:
化学工程
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材料科学
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纺织工程
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DOI
高影响因子
Journal of Materials Chemistry A
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2016
·Vol. 4
·期 39
·15189-15196
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IF 8.262
Chaolumen Wu,Chenbo Liao,Taoran Li,Yanqiong Shi,Jiangshui Luo,Lei Li,Jun Yang
A polymer lithium–oxygen battery based on lithiated perfluorinated sulfonic conducting ionomers swollen with non-aqueous solvents used as both the electrolyte and separator is successfully operated at room temperature, and shows good cycling stability and rate capability and is even operable for many cycles with a capacity as high as 1500 mA h gcarbon−1. It demonstrates the suitability of the polymer lithium–oxygen battery as a high-energy storage system.
研究领域:
材料科学
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电化学
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能源存储
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Shufeng Shen,Xiaoqin Shi,Chenxu Li,Hui Guo,Qinghai Long,Shuo Wang,Xin Yin
Nonaqueous amine-based absorbents, particularly liquid biphasic solvents, have recently received increasing attention due to the potential for reducing the energy penalty of CO 2 capture. In this work, a series of glycol ethers were used as cosolvents dissolving primary and secondary alkanolamines. Phase transition behavior, CO 2 absorption and desorption characteristics have been investigated for the nonaqueous 5.0 M amine blends. Different phase behaviors upon CO 2 absorption were discussed and well explained by the polarity change and the solubility parameter interaction distance (SPID) of components and the reaction products. Regeneration energy requirement was also experimentally estimated and compared with the reference aqueous monoethanolamine (MEA). The species in the CO 2 -loaded solution play a central role in regulating phase separation behaviour and CO 2 capture performance. A defined SPID value was recommended to predict the monophasic and the biphasic states. Advanced systems of 2-(methylamino)ethanol (MAE) with diethylene glycol dimethyl ether (DEGDME) as liquid biphasic solvent and MAE with ethylene glycol monomethyl ether (EGME) as single phase solvent were proposed for energy-efficient CO 2 capture. Among the systems investigated, MAE/EGME has the lowest regeneration energy consumption estimated at about 1.75 MJ kg −1 CO 2 captured. The ionic carbonated products of alkanolamines can trigger the phase change behaviour due to their limited solubility in the more hydrophobic and weakly polar DEGDME, resulting in two opposite phases enriched in different components. Benefiting from the high enrichment (>95 %) of CO 2 captured in the lower phase and the large cyclic capacity, MAE/DEGDME biphasic solvent can reduce the energy consumption by 50–59 % compared with aqueous MEA.
研究领域:
化学工程
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环境科学
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DOI
高影响因子
BIOMEDICAL CHROMATOGRAPHY
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2015
·Vol. 29
·期 8
·1133-1136
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IF 1.723
Li Zhang,Chaozhan Wang,Yinmao Wei
Boronate affinity has attracted much attention in recent years. It has been broadly used for selective isolation and enrichment of cis -diol-containing molecules. Conventionally, the cis -diols are adsorbed in mild alkaline aqueous solutions. In this work, for the first time, we found that boronate affinity adsorption could also be performed in nonaqueous solvent at nonbasic pH. Cis -diol-containing compounds present in herbal medicines were used for the adsorption test. The results indicated that all compounds obtained higher recoveries in the organic solvents (methanol, acetonitrile, ethyl acetate) compared with alkaline buffer. The adsorption of vicinal cis -diol-containing molecules in organic solvents could be accomplished rapidly, with high selectivity and high recoveries (>80%). These results shed light on the possibility of boronate affinity adsorption in nonaqueous solvents. The results are very important for the isolation and enrichment of cis -diols, which have poor solubility in water, especially for those in herbal medicines. Copyright © 2015 John Wiley & Sons, Ltd.
研究领域:
生物化学
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药物化学
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DOI
高影响因子
MATERIALS SCIENCE FORUM
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2020
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IF 0
Hong Qian Dai,Yuan Lu,Zhi Hin Ou,Min Xu
Fe3O4-APTES-CS2 was prepared by modification of Fe3O4 with 3-aminopropyltriethoxysilane (APTES) and carbon disulfide (CS2). Lipase was covalently bonded to Fe3O4-APTES-CS2 to obtain the immobilized lipase Fe3O4-APTES-CS2-lipase. The textural characteristic of Fe3O4-APTES-CS2-lipase was assessed by scanning electron microscopy. The optimal immobilization conditions were 2.5 mg/mL lipase, pH 7.0, 35 °C, 3 h. The loading amount of lipase was 119.0 mg/g carrier. The immobilization efficiency reached 57%. (R)-(+)-N-acetyl-1-methyl-3-amphetamine was synthesized by Fe3O4-APTES-CS2-Li- pase. The conversion, enantiomeric excess of (R)-(+)-N-acetyl-1-methyl-3-amphet-a- mine and E value reached 36.8%, 98.5% and 132, respectivel.
研究领域:
化学
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生物化学
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材料科学
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催化
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DOI
CHEMICAL ENGINEERING SCIENCE
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2025
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IF 4.3
Qi Zhao,Fei Wu,Junyi Wang,Pengyuan Gao,Kaimin Shih
A non‑aqueous separation strategy that combines acetonitrile (ACN) with 1, 3‑propanediol (PDO) is presented for the 90 yttrium(III)/ 90 strontium(II) (Y(III)/Sr(II)) separation. In an initial dissolution step, the ACN-PDO mixture displays a pronounced solubility contrast between Y nitrate (1.22 g/100 g) and Sr nitrate (0.09 g/100 g), enabling the selective dissolution of trace Y(III) while Sr(II) remains largely undissolved. Furthermore, ACN-PDO mixture also exhibits favorable physicochemical properties, e.g., relatively low viscosity (about 40 mPa·s), a suitable density difference (0.25 g/cm 3 ) from n -octane, and lower miscibility with n -octane, for constituting an extraction system with N,N,N’,N’ tetra-octyl-3-oxopentanediamide in n -octane, in which both Y(III) extraction efficiencies and separation factors greatly exceed those of aqueous-based extraction systems. Density functional theory calculations also confirmed that the Y/Sr separation is more favorable in ACN-PDO/ n -octane systems compared to water/ n -octane systems due to differences in solvation effects and contact ion pairs. A practice integrated separation process achieved a Y(III) recovery of >90 % with product purity exceeding 99 %. The overall decontamination factor (>460,000) is markedly higher than the values reported for existing aqueous‑based methods.
研究领域:
核化学
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放射化学
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分离科学
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溶剂萃取
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环境化学
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产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2016
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IF 2.567
Nan Zhong,Helei Liu,Xiao Luo,Mohammed J. AL-Marri,Abdelbaki Benamor,Raphael Idem,Paitoon Tontiwachwuthikul,Zhiwu Liang
In this work, the reaction kinetics of carbon dioxide (CO2) with diethylenetriamine (DETA) and 1-amino-2-propanol (1-AP) in methanol and ethanol systems were measured using the stopped flow technique over a temperature range of 293–313 K in terms of pseudo-first-order rate constant (k0). Concentration in the range of 10 to 50 mol/m3 for diethylenetriamine, and 20 to 100 mol/m3 for 1-amino-2-propanol were studied. The experimental data show that the pseudo-first-order rate constants (k0) increase with the increase of both amine concentration and temperature. The zwitterion mechanism and the termolecular mechanism were used to represent the data for DETA in methanol and ethanol systems with excellent ADDs of 3.5% and 2.4%, respectively, and 1-AP in methanol and ethanol systems with excellent ADDs of 2.4% and 2.6%, respectively. In comparison with EDA and AEEA in terms of k2, DETA exhibits a better reaction kinetics performance for capturing CO2. Those results will be useful in finding an efficient method for the removal of CO2 from industrial gases.
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
SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Xihai Zhang,Houfang Lu,Yingying Liu,Kejing Wu,Yingming Zhu,Binshen Wang,Bin Liang
Amidine-alcohol solution is an efficient absorbent for CO 2 capture with high CO 2 loading and low regeneration temperature compared with 30 wt% monoethanolamine (MEA) solution. However, the high viscosity restricts its further utilization in the industry. To decrease the viscosity of amidine-alcohol solutions during the absorption of CO 2 , different glycols including ethylene glycol , 1,3-propanediol, 1,2-propanediol, 1,3-butanediol and 1,4-butanediol were adopted in 1,5-diazabicyclo [4,3,0] non-5-ene ( DBN)-glycol solutions for CO 2 absorption. Both the absorption and desorption performances of those absorbents in the reaction with CO 2 were investigated including the viscosity and regeneration energy. The CO 2 loading can reach as high as 5.87 mol·kg −1 in DBN-1,3-propanediol solution, which is more than 3 times higher than that of 30 wt% MEA. Meanwhile, the viscosities for DBN-glycol-CO 2 systems can be decreased more than 95% compared with 1,8-diazabicyclo [5,4,0] undec-7-ene (DBU)-glycerol-CO 2 system. And DBN-ethylene glycol-CO 2 system shows the lowest viscosity among the five glycols systems. With DBN-1,4-butanediol solution as an absorbent, the regeneration energy can be decreased as low as 1.38 GJ·ton −1 CO 2 , which is 62% lower than that of 30 wt% MEA. After 9 cycles of absorption–desorption process, the CO 2 loading can be kept about 72% of the initial loading. Furthermore, the effect of water on absorption, desorption, viscosity and regeneration energy was also studied. It shows that the presence of water can increase the absorption rate and has little effect on the final CO 2 loading while decreasing the desorption rate. Meanwhile, the presence of water increases the regeneration energy of DBN-ethylene glycol-H 2 O-CO 2 system. However, considering the regeneration energy and viscosity, DBN-ethylene glycol solution is a promising solution for carbon capture and the regeneration energy can be decreased about 51 % even with 5 wt% water compared with 30 wt% MEA.
研究领域:
化学工程
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环境科学
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材料科学
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产品关联
DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
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2023
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IF 3.8
Xiaoyun Hou,Qinghong Shi
We described a novel polymer-lipase conjugate for high-efficient esterification of vitamin E using vitamin E and succinic anhydride as the substrates in nonaqueous media. In this work, the monomer, N -isopropylacrylamide (NIPAM), was grafted onto Candida rugosa lipase (CRL) to synthesize poly(NIPAM) ( p NIPAM)-CRL conjugate by atom transfer radical polymerization via the initiator coupled on the surface of CRL. The result showed that the catalytic efficiencies of p NIPAM-CRL conjugates (19.5 – 30.3 L·s -1 ·mmol -1 ) were at least 7-times higher than that of free CRL (2.36 L·s -1 ·mmol -1 ) in DMSO. It was attributed to a significant increase in K cat of the conjugates in nonaqueous media. The synthesis catalyzed by p NIPAM-CRL conjugates was influenced by the length and density of the grafted polymer, water content, solvent polarity and molar ratio of the substrates. In the optimal synthesis, the reaction time was shortened at least 7-times, and yields of vitamin E succinate by p NIPAM- g -CRL and free CRL were obtained to be 75.4% and 10.1 % at 55°C after the reaction for 1.5 h. The result argued that conjugation with p NIPAM induced conformational change of the lid on CRL based on hydrophobic interaction, thus providing a higher possibility of catalysis-favorable conformation on CRL in nonaqueous media. Moreover, p NIPAM conjugation improved the thermal stability of CRL greatly, and the stability improved further with an increase of chain length of p NIPAM. At the optimal reaction conditions (55°C and 1.5 h), p NIPAM- g -CRL also exhibited good reusability in the enzymatic synthesis of vitamin E succinate and kept ∼ 70% of its catalytic activity after ten consecutive cycles. The research demonstrated that p NIPAM- g -CRL was a more competitive biocatalyst in the enzymatic synthesis of vitamin E succinate and exhibited good application potential under harsh industrial conditions.
研究领域:
生物技术
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酶工程
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有机化学
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药学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Liju Bai,Shijian Lu,Qizheng Zhao,Linlin Chen,Yingjie Jiang,Chunxiao Jia,Siming Chen
Non-aqueous biphasic solvents, which combine the advantages of a non-aqueous absorbent and biphasic absorbent, have attracted increasing attention for CO 2 capture because of their great potential to reduce the energy consumption. This study proposed a non-aqueous N -ethylethanolamine (EMEA)/ N , N -diethylethanolamine (DEEA)-based liquid–liquid biphasic absorbent with p -xylene (PX) to replace 45–65 % of DEEA. The biphasic absorbent comprising 30 wt% EMEA + 5 wt% DEEA + 65 wt% PX (30E5D65P) had the best phase-change behaviour. In this absorbent, 98.8 % of the absorbed CO 2 was in the lower phase of the solvent, with a volume percentage of 35.1 %. This absorbent also showed the best CO 2 -desorption performance, with almost double the CO 2 -desorption amount and maximum CO 2 -desorption rate compared with those achieved using the 30 wt% EMEA + 70 wt% DEEA (30E70D) non-aqueous absorbent. The regeneration energy of 30E5D65P was 1.71 GJ∙t −1 CO 2 , which was reduced by 31 % and 55 % compared with that of the non-aqueous 30E70D absorbent and the aqueous 30 wt% monoethanolamine absorbent, respectively. 13 C NMR analysis and quantum chemical calculations showed that carbamate and PX have a better separation effect than that of EMEA and DEEA, owing to the presence of both polarity and hydrogen bonding. PX with low polarity was beneficial for the separation of carbamate. The carbamate interacted with (protonated) EMEA, (protonated) DEEA and carbamic acid through hydrogen bonds, resulting in the appearance of these components in the lower phase. The carbamate had no hydrogen bond self-aggregation, which may be the reason why there was no crystal precipitation.
研究领域:
化学工程
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环境科学
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能源技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）