SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Peijing Shao,Yao Shen,Jiexu Ye,Jingkai Zhao,Lidong Wang,Shihan Zhang
Metal-organic frameworks (MOFs) have been extensively studied as candidate materials for enzyme immobilization over recent years. In this work, carbonic anhydrase was immobilized in ZIFs by “in situ” immobilization method. The growth state of ZIF-8 was adjusted by adjusting the ratio of Zn 2+ and 2-Hmim to obtain crystals with different morphologies (cubic-, dodecahedral- and leaf-shape). In addition, different surfactants (cationic surface-active agent, an-ionic surfactant, and non-ionic surface-active agent) were added as “shape-inducing agents” to further regulate the crystal shapes, thus affecting the activity of enzyme immobilization in ZIFs. Through CO 2 absorption test, it was found that the thick leaf-shaped CA/ZIF-L-(PVP) induced by PVP had a higher relative activity (150%) than other shapes (cubic, dodecahedral, “burr puzzle” shape, “interpenetration leaves” shape, etc.) of immobilized enzymes. In addition, CA/ZIF-L-(PVP) exhibited excellent reusability and stability, which maintained a relative activity of 131% after 5 cycles, and remained approximately 99% relative activity after 15 days at 40 °C in MDEA solution.
研究领域:
材料科学
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生物化学
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环境科学
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产品关联
DOI
高影响因子
BIORESOURCE TECHNOLOGY
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2025
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IF 9
Chun Yang,Lei Mao,Yaxin Chen,Yanhong Zhou,Ruifang Zhang,Zhiwei Yi,Dechao Zhang,Guangya Zhang
Carbonic anhydrases (CAs) has garnered increasing attention in carbon capture, utilization and storage (CCUS) due to their ecological friendliness. However, most of them suffer susceptibility to deactivation in harsh conditions. Herein, a reliable dataset was adopted for creating ancestral CAs through an optimized ancestral sequence reconstruction (ASR) method. After prescreening, the ancestor AncCA19 was obtained and successfully expressed. The hydration activity of AncCA19 was as high as 58,859 WAU/mg, with the optimum temperature and pH obtained by esterase assay at 100 ℃ and 9, respectively. AncCA19 had the longest half-life (1.7 h) at 95 ℃ compared with existing CAs. After 2 weeks’ incubation in artificial seawater at 30 ℃ or 25.0 % N-methyldiethanolamine (MDEA) at 60 ℃, the activities remained above 47,370 WAU/mg and 6,596 WAU/mg, respectively. Thus, AncCA19, as a novel benchmark of CAs, exhibits exceptional stability in a variety CCUS applications, establishing a versatile candidate for effective CO 2 capture.
研究领域:
生物化学
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环境科学
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碳捕集、利用与封存 (CCUS)
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产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2026
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IF 3.9
Minghui Wu,Yumeng Wang,Guanjun Chen,Bo Jin,Zhiwu Liang,Hongxia Gao
Abstract Studying different absorbents and process configurations is crucial for the process performance of postcombustion CO2 capture, which can reduce the regeneration energy consumption of the stripper and improve the economics of the process. In this study, postcombustion CO2 capture processes using 30 wt % MEA and 20 wt % PZ+20 wt % MDEA as absorbents were established and investigated. Then, 30 wt % MEA and a mixed solution of 20 wt % PZ + 20 wt % MDEA were used as absorbents. Three process configurations were simulated, including the standard configuration, the AIC-SSF configuration combining interstage cooling (AIC) and split rich solvent flow (SSF), and the AIC-SSF-MVR configuration integrated with mechanical vapor recompression (MVR). The results indicate that, under standard operating conditions, the 20 wt % PZ + 20 wt % MDEA mixed amine exhibits a reboiler heat duty of 2.73 GJ/t CO2, which is 24.6% lower than that of the standard MEA baseline condition (3.62 GJ/t CO2). When adopting the AIC-SSF-MVR process configuration, the minimum regeneration energy consumption is further lowered to 2.14 GJ/t CO2, which is 40.9% less than that of the standard MEA operating condition. Economic analysis via APEA shows that the AIC-SSF-MVR process configuration using a 40 wt % PZ-MDEA solution delivers the lowest CO2 capture cost of 53.83 \$/t CO2. This value is approximately 27.9% lower relative to the standard MEA operating conditions (74.69 \$/t CO2).
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DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2019
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IF 7.65
Bing Wang,Kun Tian,Xingaoyuan Xiong,Hongyang Ren
In this study, the microelectrolysis system was applied to generate strong reductants, such as free hydrogen [H] and O ∙ , and thus removing N -Methyldiethanolamine (MDEA) in overhaul wastewater. Effects of initial influent pH, mass ratio of filings to wastewater, air aeration rate, and reaction temperature on the removal of MDEA were investigated intensively. Experimental results indicate that optimum removal rate of MDEA can be obtained at pH = 2, inlet air rate = 1 L min −1 , mass ratio of filings to wastewater = 1:1 and temperature = 25 °C. About 96.0% Total Organic Carbon (TOC) in overhaul wastewater can be mineralized by ozonation–microelectrolysis–ozonation (OMIO) treatment process. By analyzing the effluent at various stages, it was established that microelectrolysis played a leading role in the destruction of MDEA. The degradation mechanism of MDEA has been clarified through detecting the degradation products with Gas Chromatography–Mass Spectrometer (GC–MS). Subsequently, ozone reacts with intermediate products generated by MDEA degration through OH· pathway under alkaline condition. In short, these results suggest that OMIO system should be proposed as a promising treatment process for the MDEA wastewater.
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Rui Zhang,Ruixi Liu,Francesco Barzagli,Meher Geetika Sanku,Chao'en Li,Min Xiao
Mixing different amines is a common method to develop better solvents for CO 2 capture. As the mixing provides more adjustability on the solvent properties, it introduces complex interaction between dissimilar amine molecules who may perform diverse role in the reactions. Here we studied CO 2 absorption in monoethanolamine (MEA), methyldiethanolamine (MDEA) and their mixtures thereof. The speciation profiles along with CO 2 loading were provided via NMR to reveal the competition/coordination of MEA and MDEA in participating the key reactions that drove CO 2 absorption (i.e. carbamate formation and amine protonation). Furthermore, the CO 2 loading of the solvents were measured under equilibrium for various temperature, CO 2 partial pressure. The excessive CO 2 loading was firstly introduced to analyze the loading data regarding the solvent composition. Accordingly, an excessive property model was applied for data correlation. The calculated CO 2 loading agreed well with experimental data with average absolution relative deviation of 1.7%.
研究领域:
化学工程
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环境科学
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物理化学
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产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
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2019
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IF 2.29
Kun Fu,Pan Zhang,Dong Fu
The absorption amount ( m ) and loading ( α ) of CO 2 in 2-(ethylamino)ethanol (EAE) activated 3-(dimethylamino)propan-1-ol (3DMA1P) aqueous solution were measured. The temperatures ranged from 303.2 K to 323.2 K. The mass fractions of 3DMA1P and EAE respectively ranged from 0.3 to 0.5 and 0.01 to 0.03. The effects of temperature ( T ) and mass fractions of amines ( w ) on the absorption performance were illustrated. It’s impressive that the addition of very small amounts of EAE into 3DMA1P aqueous solution significantly enhanced the absorption performance. Moreover, comparison showed that 3DMA1P-EAE aqueous solution appeared much higher CO 2 absorption capacity than the widely used MDEA-MEA aqueous solution. Tray towers with different plates ( N p = 6, 8 and 10) were used to verify the removal efficiency of CO 2 ( η CO 2 ) and the effects of gas flow rate ( G ), absorbent flow rate ( L ), w , absorbent feed temperature ( T ) and N p on η CO 2 were illustrated. Our results showed that when composed of 30% to 50% (mass percent) 3DMA1P and 3% EAE, the absorbents achieved η CO 2 higher than 90%, which met the efficiency requirement specified in a power plant, thus leading to a promising industrial application in the CO 2 capture process.
研究领域:
化学工程
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环境科学
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碳捕集与封存
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）