ENERGY & FUELS
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2025
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IF 5.3
Runfen Zheng,Lixin Wei,Yuxin Bai,Jianfei Man,Jian Ye,Huiping Zhang,Yihan Wang
To address the issues of poor regeneration performance and high regeneration energy consumption associated with traditional CO2 absorbents, the development of novel phase-change absorbents has become a key area of research. In this study, a new phase-change absorbent system, DEGDEE-AEEA-AMP, is developed, using N-(2-hydroxyethyl)ethylenediamine (AEEA) as the main absorbent, bis(2-ethoxyethyl)ether (DEGDEE) as the phase-separation agent, 2-amino-2-methyl-1-propanol (AMP) as the activator, and water as the solvent. The performance of this system is compared with that of monoethanolamine (MEA) at a 30% mass concentration, which serves as the reference standard. The study includes absorption, desorption, corrosion, cyclic absorption–desorption experiments, and regeneration energy consumption estimations. The results indicate that the volume of the rich phase in the DEGDEE-AEEA-AMP (DAP) system constitutes 56.7% of the total volume. When the AMP mass fraction is 15%, the absorption capacity reaches 2.52 mol·kg–1, which is 14.0% higher than that of MEA. The maximum desorption rate is 13.19 × 10–3 mol·kg–1·s–1, which is 3.39 times higher than that of MEA. The minimum regeneration energy consumption is 2.742 GJ·t–1 CO2, representing a 29.9% reduction compared to 30% MEA. The corrosion rate of the rich liquid is 0.230 mm/a, 1.32 times that of MEA, but it can be significantly reduced by adding anhydrous Na2SO3. When the AMP mass fraction is 15%, the DAP phase-change absorbent system exhibits high absorption and desorption performance, good cyclic stability, and lower regeneration energy consumption.
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
ENVIRONMENTAL SCIENCE & TECHNOLOGY
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2020
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IF 7.864
Xiaobin Zhou,Xiaoling Li,Jianwen Wei,Yinming Fan,Lei Liao,Hongqiang Wang
To address the problems of the relatively high energy penalty and corrosivity of aqueous biphasic solvents, a novel nonaqueous biphasic solvent composed of 2-((2-aminoethyl)amino)ethanol (AEEA), dimethyl sulfoxide (DMSO), and N,N,N′,N″,N″-pentamethyldiethylenetriamine (PMDETA) was proposed for CO2 capture. With optimization, this novel AEEA–DMSO–PMDETA (A–D–P) biphasic solvent could achieve a high CO2 loading of 1.75 mol·mol–1, of which 96.8% of the absorbed CO2 was enriched in the lower phase with only 49.6% of the total volume. 13C NMR analysis and quantum calculations revealed that A–D–P could absorb CO2 to form not only carbamate but also carbamic acid species, which were stabilized by DMSO via hydrogen-bonding interactions. Most products were highly polar and preferred to dissolve in polar DMSO rather than the less polar PMDETA, thus leading to the phase change. The thermodynamics results showed that the heat duty of A–D–P was only 1.66 GJ·ton–1 CO2 (393.15 K), which was significantly lower than that of the benchmark MEA (3.59 GJ·ton–1 CO2) and the reported aqueous biphasic solvents. Moreover, A–D–P presented a noncorrosive behavior to steel after CO2 saturation, clearly showing its superiority over MEA and the aqueous biphasic solvents. Therefore, with superior properties of energy savings and noncorrosiveness, the A–D–P biphasic solvent could be a promising candidate for CO2 capture.
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
PubMed
高影响因子
AICHE JOURNAL
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2026
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IF 4.4
Hong Quan,Yaxing Zhang,Can Lv,Yimin Deng,Helei Liu
A biphasic aqueous solvent of 25% aminoethylethanolamine (AEEA)/50% diethylethanolamine (DEEA) has attracted much attention because of its cheap raw material, fast CO 2 absorption rate and low adsorption/desorption energy consumption. In this work, the mass transfer model of CO 2 absorption into biphasic solvent of DEEA–AEEA in structured packed columns was investigated. The influence of operating parameters on K G a v in a regular packed column is investigated and discussed. Meanwhile, mass transfer mechanism of CO 2 absorption into biphasic solvent of DEEA–AEEA was comprehensively examcned. In addition, the prediction model of K G a v is constructed by introducing the phase separation volume, and the error of the empirical correlation is 7%. On this basis, three machine learning algorithms, that is, backpropagation neural network (BPNN), radial basis function neural network (RBFNN) and random forest (RF) algorithms, were used to construct the K G a v model, and the AAD of the models was less than 3%.
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DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2025
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IF 3.9
Shaojun Jia,Jin Huang,Yuqing Wang,Wu Chen,Yao Jiang,Peng Cui
Nonaqueous liquid–liquid CO2 phase change absorbents (CPCAs) have garnered significant attention due to their potential for efficient and energy-saving CO2 capture in the amine-scrubbing process. This study introduces a novel nonaqueous CPCA that utilizes aminoethylethanolamine (AEEA) as the main amine absorbent, dimethyl sulfoxide (DMSO) as the organic solvent, and N-ethylmorpholine (NEM) as the phase separator. To mitigate the high viscosity of the rich phase in CPCA, diethanolamine (DEA) is introduced as a viscosity regulator, which reduces the viscosity by 79.3% by weakening the intermolecular hydrogen bonding in the CO2 products. Notably, the optimized CPCA of A20E10D40N30 demonstrates a high cyclic capacity of 2.94 mol·kg–1 and a low regeneration energy consumption of 1.79 GJ·t–1 of CO2. Overall, the efficient CO2 capture performance, low regeneration energy consumption, and minimal corrosivity make this CPCA a promising candidate for industrial CO2 capture applications.
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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能源技术
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产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2025
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IF 2.1
Yongwei Xu,Xiaosheng Zhao,Kejun Wang,Siming Xu,Yuanjun Che,Hongchen Liu,Qian Wang
Deep eutectic solvents (DESs) have emerged as a new class of eco-friendly solvents for carbon dioxide (CO2) capture due to their excellent properties and good stability. In this work, a high-performance deep eutectic solvent ChCl-AEEA absorbent with choline chloride (ChCl) as a hydrogen bond acceptor (HBA) and aminoethyl ethanolamine (AEEA) as a hydrogen bond donor (HBD) was prepared. The formation process of the ChCl-AEEA was determined by Fourier transform infrared spectroscopy (FTIR) and differential scanning calorimeter (DSC); the effects of AEEA proportion in the DES β, water content ωH2O, temperature T, and pressure pCO2 on the CO2 absorption capacity of the DES were investigated. The results showed that the CO2 absorption capacity α of the DES could be as high as 0.8528 mol of CO2/mol of DES (0.3373 g of CO2/g of DES) at 313.2 K and 0.1 MPa when ωH2O was 51.9 wt % and β was 0.8. The corresponding absorption heat was measured to be −48.34 kJ/mol, indicating a low energy consumption for desorption. The absorption capacity of the DES did not change after five absorption and desorption cycles. The absorption of CO2 in the prepared DES was chemical absorption, which was confirmed by FTIR and the 13C nuclear magnetic resonance (13C NMR) spectrum.
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
APPLIED ENERGY
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2018
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IF 7.9
Fei Liu,Mengxiang Fang,Wenfeng Dong,Tao Wang,Zhixiang Xia,Qinhui Wang,Zhongyang Luo
Using biphasic solvents for carbon dioxide (CO 2 ) capture is regarded as a promising technology to drastically reduce the regeneration energy. However, this technology hasn’t been put into commercial application due to lack of the biphasic solvents with high stabilities and low costs. To overcome this challenge, we developed a novel type of biphasic solvent based on alkanolamine-alkanolamine blends, i.e., aqueous blends of 2-(diethylamino)-ethanol (DEEA, 50 wt%) and monoethanolamine (MEA, 25 wt%) or 2-((2-aminoethyl) amino) ethanol (AEEA, 25 wt%). The aqueous DEEA-AEEA solvent demonstrated a cyclic capacity as high as 0.64 mol CO 2 /mol which is significantly higher than those of 30 wt% MEA and other reported biphasic solvents. In addition, a phase split time as short as a few minutes is obtained. The phase split dynamics were analyzed to investigate the effects of CO 2 loading, temperature, gas flow rate and height-to-diameter ratio. Quantitative 13 C NMR analysis was then performed to reveal the reaction and phase split mechanism of CO 2 absorption in the DEEA-AEEA solvent. It indicated that the reaction of AEEA with CO 2 dominated at the beginning of CO 2 absorption and the products are formed as carbamates. Then, DEEA began reacting with CO 2 to yield bicarbonate and carbonate. The phase split mechanism indicated that the reaction products of carbamates and HCO 3 − /CO 3 2− migrated to the lower phase while DEEA and unreacted AEEA migrated to the upper phase. Finally, the cyclic tests were repeated and the energy consumption was evaluated. The regeneration energy of the biphasic solvent, without process optimizations, is 2.58 GJ/tCO 2 , which is 32% lower than that of the traditional 30 wt% MEA solvent.
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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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Xiaobin Zhou,Dan Wang,Zhuo Wang,Zongqiang Zhu,Yinming Fan,Dunqiu Wang,Bihong Lv,Shengpeng Mo,Yanan Zhang,Yinian Zhu,Guohua Jing
Secondary amines are highly suitable candidates for constructing non-aqueous phase change absorbents (PCAs) that boast low viscosity and regeneration heat. However, the secondary amine-based PCAs often encounter the challenge of inadequate phase separation. This study proposed an innovative strategy of tailoring the polarity of absorption products to facilitate the controllable phase transition of the secondary amine-based PCA. Specifically, using aminoethylethanolamine (AEEA) as a regulator of product polarity to endow the 2-(ethylamino)ethanol (EAE)/pentamethyldiethylenetriamine (PMDETA)/dimethyl sulfoxide (DMSO) non-aqueous absorbent with tunable liquid–liquid phase transition behavior. The AEEA/EAE/PMDETA/DMSO (A/E/P/D) PCA realized a high CO 2 loading of 0.77 mol·mol −1 , with over 92% of the absorbed CO 2 being enriched in the CO 2 -rich phase, which exhibited a low viscosity of 13.83 mPa·s. The A/E/P/D PCA also possessed good reusability, maintaining a cyclic loading of 0.65 mol·mol −1 even after five absorption–desorption cycles. Analysis of the phase change mechanism indicated that AEEA reacted with CO 2 to form highly polar AEEA-derived products, which played a pivotal role in driving the phase transition of the A/E/P/D system. In brief, the AEEA-derived product easily combined with polar DMSO , creating a “polar sink” that continually attracted the medium-polar EAE-derived products. Consequently, these products clustered together to form the CO 2 -rich phase with less polar PMDETA being isolated to form the CO 2 -lean phase. Moreover, estimation of the regeneration heat demonstrated that the combined sensible heat and latent heat of A/E/P/D amounted to 0.32 GJ·ton −1 CO 2 , representing a significant reduction of 84% compared to 30 wt% MEA. This study provided a novel idea to manipulate the phase behavior of PCAs and offered a promising A/E/P/D PCA for energy-efficient CO 2 capture.
研究领域:
化学工程
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环境科学
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量子化学
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产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2013
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IF 2.004
Chao Guo,Shaoyun Chen,Yongchun Zhang
Solubility measurements of carbon dioxide (CO2) in aqueous 2-(2-aminoethylamino)ethanol (AEEA, 15 wt %), AEEA + N-methyldiethanolamine (MDEA, 5, 10 wt %), and AEEA + 2-amino-2-methyl-1-propanol (AMP, 5, 10 wt %) solutions as CO2 absorbents were performed at CO2 partial pressure from (0.8 to 800) kPa and temperatures of (303, 313, and 323) K. With increasing the MDEA/AMP amount to AEEA, CO2 loading of the absorbents decreased, while the absorption rate increased. At low CO2 partial pressure (< 30 kPa), the loading of AEEA + AMP was higher than that of AEEA + MDEA, while at high CO2 partial pressure (> 100 kPa), the loading of AEEA + AMP was lower than that of AEEA + MDEA at the same concentration. Furthermore, the absorption rate was in the order AEEA + AMP > AEEA + MDEA > AEEA.
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
ENERGY
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2023
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IF 9
Lijian Jin,Xueyan Hou,Lingxiao Zhan,Dawei Hou,Lina Gu,Daguang Zhang,Jianchong Shen,Zhihao Zheng,Chao Lv,Shaoqing Liu,Linjun Yang
In this study, we examined the impacts of complete and partial substitution of DEEA with physical solvents (n-butanol) on the performance of AEEA/H 2 O absorption, regeneration, and phase separation. The higher hydrophobicity (log P) of n-butanol, as a phase splitter , expedites the separation process from the AEEA-CO 2 product. Through additional refinement of the mass ratio between n-butanol and DEEA, it was observed that substituting a small portion of DEEA with n-butanol had negligible impact on the absorption capacity and enrichment of the enriched phase. However, it significantly reduced the phase separation time between the two solvent phases. Furthermore, an increase in n-butanol concentration can enhance cyclic loading. On the other hand, it reduces the production of AEEACOO − /DEEAH + , which is more stable compared with AEEACOO − /AEEAH + . Molecular dynamics simulations revealed that n-butanol can modulate the reduction of water molecules surrounding AEEA, creating a lower water molecule environment, which improves the absorption rate of the absorbent in the pre-absorption phase. The addition of a low concentration of n-butanol improves the initial absorption rate, phase separation performance, circulation capacity, and further reduces the regeneration energy of the absorption solution without compromising the CO 2 loading and regeneration energy.
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DOI
高影响因子
International Journal of Greenhouse Gas Control
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2014
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IF 3.821
Chao Guo,Shaoyun Chen,Yongchun Zhang
Quantitative 13 C nuclear magnetic resonance (NMR) spectroscopy was used to study carbon dioxide (CO 2 ) absorption and desorption, at 313 and 393 K, respectively, from 30 wt% aqueous 2-(2-aminoethylamine)ethanol (AEEA), 30 wt% 2-amino-2-methyl-1-propanol (AMP) and 20 wt% AEEA + 10 wt% AMP solutions. The 13 C NMR results indicate that the main AEEA species are free amine, protonated amine, primary carbamate and secondary carbamate, and the main AMP species are free amine and protonated amine. There is no evident indication that dicarbamate species of AEEA and carbamate of AMP are formed. When AEEA absorbs CO 2 , the formation of AEEA carbamate on primary amine is comparatively faster than that on secondary amine. During the CO 2 desorption process, the AEEA carbamate on secondary amine is produced by an endothermic reaction, which reduces the overall efficiency of desorption. Six cycles of absorption–desorption tests are performed to measure the feasibility of regenerated amine solutions for reuse and the absorption amount of them remains essentially constant during the second to the sixth absorption–desorption experiments. Compared with pure AEEA solution, the recyclability of blended amines, AEEA + AMP, improves while the mol CO 2 /mol amine (CO 2 loading) of the blended amines decreases.
研究领域:
化学工程
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环境化学
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碳捕集与封存（CCS）
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物理化学
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核磁共振（NMR）波谱学
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DOI
高影响因子
危险品化学品经营许可证（带存储）