INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2021
·
IF 3.764
Hao Ling,Qiufeng Mao,Sen Liu,Hongxia Gao,Juan Lv,Yu Mao,Zhiwu Liang
Aqueous amine-based CO2 capture is considered as the most mature and applicable CO2 capture method for post-combustion. With the CO2 capture process running for a long time, the degradation of aqueous amine-based is inevitable, and the degradation products are numerous and complicated. Therefore, the performance evaluation of aqueous amine solutions containing degradation products is crucial in both guiding the selective removal of degradation products and maintaining or reducing of the solution cyclic utilization rate. Unfortunately, a simple and effective way to increase the economic feasibility of the CO2 capture process after accumulated degradation products remains absent, and little attention has been paid to the real effect of degradation products on the CO2 capture performance in aqueous amine solutions. In this work, we propose a simple method to evaluate the performance and regeneration energy of aqueous monoethanolamine (MEA) solutions accumulating single degradation products based on the fast-bubbling reactor. Using this method, it is possible to quickly determine the key degradation products that affect the performance of aqueous MEA solutions so as to achieving clearer optimization, more direct purification, and a reduced solution cyclic utilization rate.
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
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
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
✓ 已验证
产品关联
DOI
高影响因子
ENERGY & FUELS
·
2017
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IF 3.091
Hongxia Gao,Zeyang Wu,Helei Liu,Xiao Luo,Zhiwu Liang
The absorption/desorption performance of carbon dioxide (CO2) in aqueous 5 M monoethanolamine (MEA) solutions in the presence of various solution regeneration promoters was comprehensively investigated using a multiple rapid screening method. The promoters considered were N-methyldiethanolamine (MDEA), N,N-dimethylethanolamine (DMEA), N,N-diethylethanolamine (DEEA), 1-dimethylamino-2-propanol (1DMA2P), 1-diethylamino-2-propanol (1DEA2P), 3-dimethylamino-1-propanol (3DMA1P), 2-(dimethylamino)-2-methyl-1-propanol (2DMA2M1P), triethanolamine (TEA), 3-(dimethylamino)-1,2-propanediol (3DMA-1,2-PD), and 3-(diethylamino)-1,2-propanediol (3DEA-1,2-PD). The molar concentration of these promoters added into 5 M MEA was set to 1 mol/L. At the atmospheric pressure, the absorption and stripping experiments were carried out at 313.15 and 353.15 K, respectively. Especially, the CO2 partial pressure was controlled at constant 15 kPa for absorption experiments. In addition, the equilibrium solubility of CO2 was also determined in order to evaluate the driving force of each amine system. The results showed that the highest CO2 equilibrium solubility of 0.5548 mol CO2/mol amine was obtained by MEA/1DEA2P, whereas both the fastest absorption and regeneration rates were achieved for aqueous blended MEA/1DMA2P solution which made MEA/1DMA2P to exhibit the highest CO2 cyclic capacity of 1.6710 mol CO2/L.
研究领域:
化学工程
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环境科学
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能源技术
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物理化学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Yuchen Li,Zhen Chen,Guoxiong Zhan,Bingling Yuan,Lidong Wang,Junhua Li
Catalytic amine-based solvent regeneration with solid acid is a feasible option for reducing energy consumption of CO 2 capture, but facing crucial challenges on designing material structures and understanding reaction mechanisms. Herein, we cover the nanoscale NiFe 2 O 4 cluster with covalent organic frameworks (COFs), to prepare solid acid catalysts. The pristine chemical bonds of Ni(Fe)-O and Ni(Fe)-Ni(Fe) are substituted by Ni(Fe)-N and Ni(Fe)-N-Ni(Fe) by targeting the anchoring of NiFe 2 O 4 cluster over COFs. The created coordination state stimulates the production of Brønsted acid sites. The obtained nanomaterials achieve a considerable improvement in CO 2 desorption of up to 290.1 mmol/(min·g) at 88 °C for spent monoethanolamine (MEA) solvent, representing a substantial increase of 540% relative to traditional thermal desorption. Consequently, the energy consumption of MEA generation is reduced by approximately 58%. Intermediate species (HCO 3− , CO 3 2− , and RNHCOO − ) and reaction pathways are established by combining operando Raman spectroscopy and ex situ 13 C NMR spectrum measurements. Theoretical calculations are performed to clarify the transformation mechanism of the acid sites around Ni/Fe atoms and its intrinsic role in the adsorption equilibrium of solvent regeneration.
研究领域:
环境科学
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化学工程
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材料科学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2022
·
IF 9.136
Baoqiang Wang,Xiaochun Chen,Guangren Yu
A new class of biphasic system composed of tetraethylene pentaamine (TEPA), organic solvents and water is developed for capturing CO 2 , among which TEPA/Diethyleneglycolmonomethylether (DGME)/Water shows the best performance. When the TEPA/DGME/Water with mass ratio 3:3:4 is at 25 °C and atmospheric pressure, CO 2 absorption capacity reaches 1.89 mol CO 2 /mol amine (2.99 mol CO 2 /kg) after 50 mins, in which CO 2 rich phase accounts for 73%. The CO 2 desorption efficiency reaches about 97% at 130 °C and the CO 2 desorption energy consumption is 53.2%, 27.4% and 3% lower than that of MEA, TEEA/DEEA/Water and 0.5D1.5A3P respectively. The CO 2 cycle capacity is approximately 60% higher than that of traditional monoethanolamine (MEA)/1-propanol/Water biphasic absorbent. Compared with previously reported biphasic system, even with similar absorbent masses, the absorption equilibrium time is significantly shortened with competitive absorption capacity. This is a class of promising absorbent for capturing CO 2 .
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
产品关联
DOI
高影响因子
FUEL
·
2022
·
IF 8.035
Xiayi Hu,Juntao Huang,Xinwei He,Qi Luo,Chao'en Li,Changbo Zhou,Rui Zhang
The challenge for the carbon dioxide (CO 2 ) capture by using amine solution is the huge energy cost in solvent regeneration process, this work combined the advantages of three conventional amines, monoethanolamine (MEA), 1-Dimethylamino-2-propanol (1DMA2P), and piperazine (PZ) to formulate an effective trio-amine blend to capture CO 2 , and the results demonstrate that the blends could reduce the energy consumption by 29.4–55.4%, increase the average desorption rate by 60–140%, and increase the cyclic capacity by 40–120%, relative to 5 M MEA solution. Through analysis the regeneration mechanism in detail, it is found that more proton provider in the trio-amine blends could help to reduce the energy consumption by lower the reaction activation energy in the deprotonation process of the protonated amines. Finally compared to the reported amine systems in considering of the energy cost, it is found that the MEA-1DMA2P-PZ could be a potential candidate for capturing CO 2 in industrial.
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
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
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IF 13.3
Lijian Jin,Xueyan Hou,Lingxiao Zhan,Shangzhi Xie,Lina Gu,Hangqi Yang,Xin Wang,Xinfeng Qian,Jianchong Shen,Linjun Yang
In order to ameliorate the issues of corrosion and high regeneration energy associated with traditional biphasic solvents, a nonaqueous biphasic solvent has been proposed as a potential alternative. This study introduces Tetramethylethylenediamine (TMEDA) as a phase splitter within the Ethanolamine (MEA)/Dimethyl sulfoxide (DMSO) system, resulting in a novel nonaqueous biphasic solvent, TMEDA/MEA/DMSO. Compared with other screened phase splitters, the appropriate polar size and intermolecular interaction force of TMEDA are the key factors that make it comply with the screening of nonaqueous biphasic solvent. When the mass ratio of TMEDA/MEA/DMSO is maintained at 3:3:4, the CO 2 loading attains 0.54 mol (CO 2 )/mol (MEA), with the rich phase comprising 75 % of the total. 13 C NMR and FT-IR characteristics showed that the absorbent product is mainly in the form of MEACOO − /MEAH + . Absorption and phase separation mechanisms of absorbent elucidated by DFT calculations and molecular dynamics simulations. The limited opportunity for TMEDA to interact with MEA molecules emerges as the primary reason for its reduced involvement in the reaction, with the inclusion of TMEDA intensifying the aggregation of MEACOO − /MEAH + and triggering phase transition. In comparison to a 30 wt% MEA water-based absorbent, TMEDA/MEA/DMSO exhibits a 40 % reduction in regeneration energy (estimate) and possesses energy-saving attributes, rendering it a promising candidate for 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
✓ 已验证
产品关联
DOI
高影响因子
Optoelectronics Letters
·
2021
·Vol. 17
·期 12
·751-756
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IF 0
Yang Chen,Gu Weiyuan,Yu Shuguo,Zhang Hongyan
In this study, using surfactant monoethanolamine (MEA), zinc oxide (ZnO)-MEA humidity sensor based on ZnO was successfully prepared by hydrothermal method. MEA makes the surface of the ZnO-MEA have more oxygen vacancy and hydrophilic functional groups, which improves the performance of ZnO humidity sensor. ZnO-MEA achieved a change of 4 orders of magnitude at room temperature in the relative humidity (RH) from 11% to 95%, and it shows better linearity, shorter response/recovery time (20 s/15.9 s), smaller humidity lag and long-term stability. In addition, the distribution of ZnO-MEA particles is more uniform and provides more active sites for adsorption of water molecules to enhance humidity sensing performance.
研究领域:
材料科学
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传感器技术
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纳米技术
✓ 已验证
产品关联
DOI
International Journal of Greenhouse Gas Control
·
2019
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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
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膜技术
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Rui Zhang,Yufan Li,Xinwei He,Yingjie Niu,Chao'en Li,Mohammad Waleed Amer,Francesco Barzagli
Mixing amines with different properties is considered a smart strategy for developing efficient aqueous solutions for reversible CO 2 capture. Specifically, dual-amine blends containing the tertiary amine 2-dimethylamino-2-methyl-1-propanol (2DMA2M1P) have proven to be particularly advantageous due to significantly lower regeneration costs compared to conventional sorbents. With the aim of formulating high-efficiency sorbents, in this work we evaluated the improvement in the CO 2 capture performance of such dual-amine blends by adding a further amine to form trio-amine systems: the use of three amines with different characteristics could further emphasize the advantages obtainable during both absorption and desorption. We formulated three new different aqueous solutions prepared by mixing 2DMA2M1P with the reaction rate promoter ethanolamine (MEA) and the absorption capacity promoter 2-amino-2-methyl-1-propanol (AMP) in different molar ratios. For each blend, the CO 2 solubility at equilibrium, the CO 2 absorption rate from a gaseous mixture, the regeneration rate at T = 373 K and the energy requirement for desorption were determined experimentally. In addition, to better understand the capture mechanism, 13 C NMR spectroscopy was employed to evaluate the speciation of each blend during the CO 2 absorption. Their CO 2 capture performance was compared with that of the benchmark aqueous MEA and two 2DMA2M1P-based dual-amine mixtures, obtained with the same procedure. As a finding, all formulated trio-amine blends have superior CO 2 equilibrium solubility and desorption performance compared with MEA 5 M. Noteworthy, the comparison with similar dual-amine systems highlighted the role of a suitable third amine in order to obtain enhance both absorption and desorption efficiencies. Among the formulated systems, MEA-2DMA2M1P-AMP (1:2:2) is potentially the most suitable to replace MEA in CO 2 capture processes after a careful cost-benefit analysis on larger scale systems.
研究领域:
化学工程
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环境科学
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材料科学
✓ 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）