JOURNAL OF MEMBRANE SCIENCE
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2023
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IF 9.5
Kaili Xue,Guoxiong Zhan,Xiaona Wu,Heng Zhang,Zhen Chen,Haiping Chen,Junhua Li
To develop an energy-efficient and available carbon dioxide (CO 2 ) capture technique with amine-based solvents and membrane contactors (MCs), an innovative technological route was proposed to remove CO 2 from industrial flue gas by coupling MCs with catalyst-aided solvent regeneration (MC-CR). A laboratory-scale experimental setup with ceramic membrane module was then designed and built to accurately estimate the performance of the MC-CR route, using aqueous monoethanolamine (MEA) and powder metatitanic acid [TiO(OH) 2 ] as the solvent and catalyst, respectively. The results indicated that the nanofluid effect of the catalyst reduced the mass transfer resistance and promoted a concentration change in the liquid film , resulting in a high CO 2 absorption rate.The surface acidic sites of TiO(OH) 2 boosted the process of proton transfer in the solvent, thus facilitating the decomposition of carbamate. The CO 2 capture efficiency increased by 9.48% and the energy consumption of solvent regeneration considerably decreased by 40.8% at dosage of 2 wt% TiO(OH) 2 . In addition, matched pressure regulation for gas–liquid flow in the MCs effectively avoided membrane fouling and wetting after 180 min continuous operation. Industrial-scale simulation indicated that the MC-CR route achieved a low capture cost at $46.7/t CO 2 , a decrease of 28% compared with the cost of the traditional route. This study established the groundwork for developing MC technology as an effective approach for low-cost industrial CO 2 capture.
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
SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Yuchen Li,Zhen Chen,Bingling Yuan,Lei Xing,Guoxiong Zhan,Yue Peng,Lidong Wang,Junhua Li
Using waste red mud as catalysts for enhancing mass transfer and boosting amine-based solvent regeneration is a promising option for both resources recycling and efficient carbon capture. Here, the effect of fine red mud particles was firstly investigated on carbon dioxide (CO 2 ) absorption and desorption. The Brownian motion and shuttle effect of submicron or micron red mud particles play a positive role in reducing the concentration boundary layer and updating the CO 2 -species concentration of liquid/gas film, which is beneficial for mass transfer enhancement. Additionally, the composite metal oxides of red mud support abundant acid/base active sites for water dissociation, which can promote the proton transfer and boost carbamate decomposition. Therefore, the average enhancement factor is ∼1.49 and the average absorption rate increases by 22.8 %; while the maximal desorption rate (2.14 mmol/min) increases by 289 % and relative heat duty decreases by 16.3 %, after adding 2.5–5 % red mud particles. The continuous CO 2 absorption–desorption experiments verify red mud increases the capture efficiency from 51.6 % (blank test) to 62.4 %. The results offer a favorable technology for reuse of industrial solid waste in the field for low-energy carbon capture.
研究领域:
环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
ENERGY
·
2024
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IF 9
Huajun Zhao,Jingyi Liu,Shuaiqing Cheng,Rujie Wang,Qiangwei Li,Shanlong An,Shihan Zhang,Lidong Wang
Biphasic solvents with primary/secondary amines as the primary absorbent involve a high heat of reaction and low desorption efficiency, limiting their development. A tertiary amine-based biphasic solvent composed of diethylethanolamine (DEEA), 2-Amino-2-methyl-1-propanol (AMP), ethyl acetoacetate (EAA), and H 2 O (referred to as DEEA/AMP/EAA/H 2 O) was proposed, which exhibited superior low-temperature desorption performance and ultra-low regeneration energy. EAA was revealed to facilitate the low-temperature desorption by reducing the activation energy from 6.8 to 2.3 kcal/mol. When regenerated only by heating to 353.15 K, the CO 2 -rich phase showed a significant desorption efficiency of 88.2 %; the desorption capacity and desorption rate were even 2.23 times and 6.84 times higher than 30 wt% MEA at 393.15 K. Moreover, the desorption heat dominated by the deprotonation of tertiary amine was as low as 0.92 GJ/t CO 2 ; and low-temperature regeneration brought extremely low latent heat below 0.062 GJ/t CO 2 . Thus, the total regeneration energy was as low as 1.16 GJ/t CO 2 . In addition, EAA could trigger the phase separation and increase the absorption rate constant from 3.87 E−4 to 1.36 E−3 s −1 , even higher than 30 wt% MEA. The addition of AMP further increased the CO 2 loading (4.34 mol/L) and CO 2 distribution (97.43 %) of the CO 2 -rich phase.
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
APPLIED ENERGY
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2024
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IF 10.1
Xuebing Liu,Xiaowei Niu,Guoxiong Zhan,Lei Xing,Zhoulan Huang,Bingling Yuan,Yue Peng,Zhen Chen,Junhua Li
Compared with biphasic solvents with blend amines, the mixture of physical solvent, amines and water (ternary solvent) was a promising preparation strategy. Chemical CO 2 absorption with amine-based solvents is a promising route for industrial CO 2 capture, but suffering from intensive heat duty for solvent regeneration. Developing high-performance biphasic solvent and efficient dynamic phase separator is an effective solution. In this study, poly(ethylene glycol) dimethyl ether (NHD) was selected as the separating agent to prepare a biphasic solvent based on a blended amine (Diethylenetriamine (DETA) and N , N -dimethylcyclohexylamine (DMCA) solvent with a screened proportion of DETA: DMCA: NHD: H 2 O of 1:3:4:2. The CO 2 loading of the saturated solvent was 4.6 mol·L −1 , with over 96% of the CO 2 species concentrated in the rich phase, and with low viscosity of 48.60 mPa·s. The maximum desorption rate of CO 2 -saturated solvent was up to 1.68 mmol·min −1 , and it increased by 243% compared to the MEA solvent (30 wt% MEA and 70 wt% water). The intermediates in various phases were identified using NMR to monitor the species changes during phase splitting. The dynamic phase-splitting capacity was first determined using a quasi-two-dimensional separator, and the results revealed that the liquid velocity of the mixed phase had a dominant effect on the separation efficiency. Furthermore, a novel annular phase separator was proposed to achieve efficient phase separation (the relatively rich separation efficiency increased by 13.40% compared to that with the benchmark.) by decreasing the tangential turbulence from the inlet velocity . The time–space distribution of the CO 2 loading was obtained at different operational parameters. In particular, the effect of water content on separation efficiency was investigated to verify the adaptability of biphasic solvents for practical application.
研究领域:
化学工程
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环境科学
✓ 已验证
DOI
高影响因子
APPLIED ENERGY
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2019
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IF 8.426
Xiaowen Zhang,Yufei Huang,Hongxia Gao,Xiao Luo,Zhiwu Liang,Paitoon Tontiwachwuthikul
The extensive energy penalty of CO 2 -loaded solution regeneration is one of the most crucial challenges facing industrial application of amine-based CO 2 capture technology. Here, to decrease the energy requirement, the regeneration behaviors of the rich 5 M monoethanolamine (MEA) and 3 M MEA-2.5 M N-methyl-diethanolamine (MDEA)−0.5 M piperazine (PZ) tri-solvent blended amines (tri-blend) with four different solid acid catalysts (H-mordenite, Hβ, HZSM-5 and Al 2 O 3 ) were studied at 98 °C. For the catalyst-free tests, the results revealed that the tri-blend hugely enhanced the CO 2 desorption kinetics and reduced the relative energy consumption compared to 5 M MEA. Based on the results of 13 C NMR, the multiple proton transfer paths and abundant bicarbonate ions in the tri-blend contribute to the improved regeneration performance. Additionally, the use of catalyst further improved the CO 2 desorption activity of the tri-blend. The combination of Hβ and tri-blend presented the best regeneration performance, increasing the desorption performance by 1360.8%, and reducing the relative energy requirement by 66.1% compared with the blank run of MEA. In addition, a plausible catalytic mechanism of solvent regeneration over the solid acid catalyst in the tri-blend was suggested. The superior catalytic performance of Hβ resulted from the large mesoporous surface area, larger number of Brϕnsted acid sites and prominent total acid sites. Furthermore, Hβ displayed excellent stability and had no adverse influence on the CO 2 absorption activity. Results herein manifest that the combination of tri-blend amines with high-efficiency catalyst is exceptional strategy for tremendously decreasing the energy consumption of amine-based CO 2 capture processes, ultimately making this technology more technically and economically feasible.
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
INDUSTRIAL CROPS AND PRODUCTS
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2024
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IF 5.6
Junhong Wang,Dongming Lan,Junping Zhuang,Yonghua Wang
Fruit shell biomass is an agricultural waste that could be valorised into various value-added chemicals. However, the intertwined structure between lignin and holocellulose limits free sugar generation for further fermentation, requiring efficient pretreatment for selective delignification. We pretreated Camellia oleifera shell by ethanolamine-based solvents (binary deep eutectic solvents and single ethanolamine or its derivatives), and compared pretreatment effectiveness of these solvents. Single ethanolamine was the best among ethanolamine-based solvents, indicating the unnecessity of deep eutectic solvent synthesis. Furthermore, structural characterization confirms that ethanolamine could effectively deconstruct Camellia oleifera shell with the highest delignification (76.46%) and sugar yields (83.73% for glucose and 66.87% for xylose) at 130 °C for 3 h. Additionally, correlation analysis suggests that alkalinity and proton dissociation capacity together determined the delignification capacity of ethanolamine. Our findings serve a potential solution to valorise the waste fruit shell lignocellulose resources.
研究领域:
生物技术
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化学工程
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农业科学
✓ 已验证
产品关联
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
JOURNAL OF MEMBRANE SCIENCE
·
2025
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IF 9
Yunzhao Guo,Jicheng Liu,Xingwang Qi,Kaiyun Fu,Xianfu Chen,Minghui Qiu,Yiqun Fan
Amine-based CO 2 capture is hindered by energy-intensive solvent regeneration (>120 °C). Here, we propose a falling-film hydrophilic ceramic membrane contactor to address efficiency-scalability trade-offs in conventional hydrophobic systems. This design eliminates pore-level mass transfer barriers while maximizing interfacial contact. However, quantitative predictions of permeation-coupled falling film dynamics remain underdeveloped, hindering scale-up. This work addressing three critical gaps: (1) Mechanistic modeling of falling film dynamics under permeation, (2) microscale analysis of permeation-falling film coupling transport characteristics, and (3) prediction correlation using dimensionless parameters ( Re , We , Sh ) linking micro-macro transport. A multiphysics framework combining 2D phase-field simulations (validated experimentally, residual deviation < 3.1 %) outperforms 1D models (errors 14.5–31.7 %). High-fidelity 2D simulations reveal that radial permeation significantly induces axial film heterogeneity and enhances interfacial wave dynamics. The derived Re - We - Sh engineering correlation ( R 2 = 0.98) demonstrates a prediction accuracy. This model creates a bi-directional framework: it both explains observed industrial performance through first-principles mechanisms and predicts optimal operating conditions for sustainable solvent regeneration.
研究领域:
化学工程
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膜科学
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流体动力学
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二氧化碳捕集技术
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多相流
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传热传质
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2023
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IF 4.7
Qiang Sun,Jia Xiong,Hongxia Gao,Wilfred Olson,Zhiwu Liang
Catalytic CO 2 desorption from rich amine solution is a practical approach to reducing energy consumption for amine regeneration. In this study, for the first time, the catalytic effect of environmentally friendly, imidazole series ionic liquids ([Bmim]PF 6 , [Bmim]BF 4 , [Bmim]HSO 4 , [Bmim]NO 3 , [Bmim]CH 3 COOH, [Bmim]Cl, [Bmim]Br, and [Bmim]I) is evaluated in terms of CO 2 desorption rate, amount of CO 2 released, and heat duty. Overall, the [Bmim]PF 6 catalyst shows excellent catalytic activity for CO 2 desorption, increasing the quantity of CO 2 released by 21.35% and reducing the relative heat duty by 17.59%. In addition, the catalytic applicability of [Bmim]PF 6 for secondary and tertiary amine systems was evaluated. Of note, the homogeneous [Bmim]PF 6 catalyst presents good stability during 5 cycles. The catalyst/MEA (monoethanolamine) solution ratio of 3 wt% retained about 94% of the catalytic performance after five cycling tests without any reactivation step, showing the potential application of this desorption technology for CO 2 capture with lower heat duty.
研究领域:
化学工程
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环境科学
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催化
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碳捕集与封存
✓ 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）