ENERGY
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2024
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IF 9
Fanli Meng,Kun Fu,Xueli Wang,Bonan Ye,Pan Zhang,Lemeng Wang,Dong Fu
Previous work has shown that non-aqueous absorbent composed of dimethyl sulfoxide (DMSO) and 2-ethylhexylan-1-amine (EHA) is superior to commercial monoethanolamine (MEA) in both absorption of CO 2 and desorption. However, the price of DMSO is too high, which leads to the high cost of reagents. It is worthwhile to choose a cheap solvent instead of DMSO, which can also achieve satisfactory absorption and desorption performance. Around this goal, we selected diethylene glycol diethyl ether (DEGDEE) to form a non-aqueous absorbent with EHA and investigated the absorption and desorption performance. The desorption efficiency of 70 wt% EHA +30 wt% DEGDEE was 99 % at 373 K. The desorption efficiency was 89.4 %, and the desorption energy consumption was only 45.1 % of MEA when the water content was 10 wt%. DEGDEE can achieve similar or even better performance than DMSO, while the cost of DEGDEE (12000–31000 RMB/ton, technical grade purity 99 %) is lower than DMSO (40000–48000 RMB/ton, technical grade purity 99 %). In addition, it also has a good recycling capacity. These advantages will certainly endow this newly developed absorbent with great application prospects in the field of CO 2 capture.
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
ENERGY
·
2022
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IF 8.857
Kun Fu,Mingzhen Zheng,Dong Fu
The results of beaker experiments (Fu et al., 2021, 2022) showed that water-lean 2-ethylhexan-1-amine (EHA) + diglyme absorbent has more advantages than the commercial water-based ethanolamine (MEA) absorbent in terms of characteristics of carbon dioxide (CO 2 ) absorption and desorption. Verifying CO 2 capture characteristics in a tower facility is essential to absorbents development. In this work, a pilot packed tower was set up and the Dg16 type polypropylene step ring was taken as packing to test the capture efficiency and mass transfer performance of EHA + diglyme water-lean absorbent for low partial pressure CO 2 , and then the effects of gas-liquid ratio, CO 2 partial pressure and packing height on the capture performance were clarified. The results showed that the absorption of CO 2 by EHA + diglyme water-lean absorbent was dominated by liquid-phase mass transfer in the packed tower. Compared with aqueous 30 wt%MEA, the water-lean EHA + diglyme achieved much higher CO 2 capture efficiency and overall volumetric mass transfer coefficient. This work demonstrated the transition from water-free absorption to water-lean absorption under the existence of water vapor in flue gas . It can provide basic data for the design of the CO 2 capture process based on water-lean absorption in packed towers.
研究领域:
化学工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2020
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IF 5.065
Kun Fu,Pan Zhang,Lemeng Wang,Xiayu Huang,Dong Fu
The viscosities ( η ) of 2-ethylhexan-1-amine (EHA), diglyme , triglyme , tetraglyme and EHA-diglyme/triglyme/tetraglyme non-aqueous solutions were measured by using the NDJ-5S rotational viscometer at 101 kPa. The temperatures ( T ) ranged from 303.2 K to 323.2 K. The mass fractions of EHA ( w EHA ) ranged from 0.100 to 0.900. The viscosity was modeled and the calculated results agreed well with the experiments. The effects of w EHA and T on viscosity were demonstrated on the basis of experiments and calculations. The initial absorption rates of CO 2 ( r ) in EHA-diglyme/triglyme/tetraglyme non-aqueous solutions were measured, and the effects of viscosity, absorbent concentration and absorption rate constant of CO 2 ( k ) on initial absorption rates were demonstrated. Our research shows that in the temperature range of 303.2 K to 323.2 K, the proposed three non-aqueous absorbents have small solution viscosities (<3 mPa·s), which is beneficial to the mass transfer of CO 2 absorption and the initial absorption rate. Thus the proposed non-aqueous absorbents have good application potential in the field of CO 2 capture process.
✓ 已验证
产品关联
DOI
高影响因子
ENERGY
·
2023
·
IF 9
Fanli Meng,Kun Fu,Xueli Wang,Yixiao Wang,Lemeng Wang,Dong Fu
In previous work by Fu et al. (2021, 2022), the performance of 2-ethylhexylan-1-amine (EHA) and diglyme absorbents for carbon dioxide (CO 2 ) capture from flue gas was demonstrated. In this study, dimethyl sulfoxide (DMSO) was selected as a replacement for diglyme due to its high boiling point , low viscosity , and environmentally friendly properties. The optimization of the mass fraction resulted in a composition of 60 wt% EHA and 40 wt% DMSO, considering factors such as absorption capacity , absorption rate, and viscosity. At a desorption temperature of 373 K, the CO 2 -loaded EHA-DMSO exhibited a desorption efficiency of approximately 98 %. The estimation of desorption energy ( E t ) consumption, using the method of electric energy consumption , revealed that EHA-DMSO achieved approximately a 50 % reduction in E t compared to the MEA (30 wt%) absorbent. Even with a water content of 10 %, E t was reduced by around 40 %. Additionally, the absorbent demonstrated notable advantages in terms of water resistance and cycle performance. The advantages of environmental friendliness and easy availability of raw materials suggest that the EHA-DMSO absorbent holds a promising potential for broader application in the field of CO 2 capture from flue gas.
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产品关联
DOI
高影响因子
HYDROMETALLURGY
·
2023
·
IF 4.7
Xintong Li,Yongna Guo,Xin Ma,Chao Zhang,Jia Yang,Shuai Wang
Herein, a series of α -hydroxyalkyl phosphinic acids were designed and first introduced in Mn 2+ extraction and Mn 2+ -Mg 2+ separation. The extraction tests indicate that the α -hydroxy-2-ethylhexyl phosphinic acid ( α -H-2-EHA) possesses superior extraction ability compared to di-2-ethylhexyl phosphinic acid (P204) for Mn 2+ and Mg 2+ , and the partition coefficient ( β ) is 28.2 at a saponification ratio of 30%. The results of quantum chemical calculation, FT-IR spectrum and slope analysis method reveal that the α -H-2-EHA can form stable four-membered ring structure with metal ions during the extraction process through P–OH and P O bonds. Furthermore, the HOMO composition results suggest that α -OH might also promote the interaction between extractant and metal ions. Finally, a three-stage countercurrent extraction—washing—stripping process was proposed and Mn 2+ can be enriched from 11.2 g/L to 36.6 g/L, with Mg 2+ decreased from 30.3 g/L to 0.6 g/L, which provides an efficient strategy for the preparation of high-purity manganese.
研究领域:
化学工程
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分析化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2026
·
IF 8.4
Xinyou Zhang,Yutong Yang,Jianxin Wang,Jianjiao Xin,Wendi Wang,Yao Chen,Guangming Yin,Hong Pan
Among various cathode materials, sulfurized polyacrylonitrile (SPAN) is considered a highly promising cathode for Lithium-sulfur (Li-S) batteries due to its unique covalent sulfur fixation mechanism, which fundamentally suppresses polysulfide dissolution and the shuttle effect. However, conventional SPAN materials typically limit sulfur chains to short S 2 -S 4 structures to maintain a solid-solid reaction, restricting their theoretical capacity. Moreover, the material's insulating nature and significant volume changes during cycling greatly limit its electrochemical performance and practicality. To address these issues, this study designed and synthesized a high-elasticity water-based binder based on a 2-ethylhexyl acrylate/acrylic acid/methyl methacrylate (2-EHA-AA-MMA) terpolymer. Abundant carboxyl groups (-COOH) in its molecular chain form stable S-O covalent bonds with sulfur chains in SPAN. Combined with PAN's terminal fixation of sulfur chains, this achieves a synergistic “long-chain capacity enhancement and strong anchoring shuttle suppression” effect. It stabilizes long S 6 chains, improving cycling stability and reversible capacity, while also directing S 6 conversion directly to Li 2 S 3 , bypassing soluble Li 2 S 4 intermediates to suppress shuttle effects at the source. Experimental results show that the SPAN cathode with this binder delivers a high specific capacity of 850.3 mAh g −1 at 0.1 C, with 68.4% capacity retention after 100 cycles and effective polysulfide shuttle suppression.
✓ 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）