JOURNAL OF MATERIALS RESEARCH
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2022
·Vol. 37
·期 18
·3049-3059
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IF 2.909
Ma Chang,Xu Chengcheng,Meng Qingfang,Yang Haili,Xie Rui,Zhang Huiping,Tu Haoyu,Zhao Yueqiang,Wang Mingyan,Xu Guoxiang,Zhu Jing
In this paper, with cellulose microsphere as the substrate, a polyaniline/cellulose composite was prepared by means of in situ polymerization in supercritical CO 2 (SCCO 2 ) environment, and the effect of experimental pressure, temperature, and reaction time on the morphology and electrochemical properties of the composite were explored. In addition, the electrochemical properties of the composite were compared with the one prepared under normal temperature and pressure condition (NPT). The results show that the polymerization time of aniline in SCCO 2 is greatly shortened comparing with chemical oxidation of 6 h, and the capacitance of the composite prepared in SCCO 2 can reach 391 F·g −1 at the scanning rate of 5 mV·s −1 , which is higher than 286 F·g −1 under NPT. After 300 charge–discharge cycles, the capacitance retention of the composite prepared in SCCO 2 and NPT are 91% and 83%, respectively. The stability of the composite material prepared in SCCO 2 is significantly improved. Graphical abstract
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2024
·Vol. 16
·期 3
·393
·
IF 4.7
Xiaoyu Du,Shijun Zhao,Yanqing Qu,Hongge Jia,Shuangping Xu,Mingyu Zhang,Guoliang Geng
Imidazole ionic liquids (ILs) have good affinity and good solubility for carbon dioxide (CO2). Such ionic liquids, combined with polyimide membrane materials, can solve the problem that, today, CO2is difficult to separate and recover. In this study, the ionic liquid (IL) of 1-ethyl-3-methylimidazolium tetrafluoroborate (IL1), 1-pentyl-3-methylimidazolium tetrafluoroborate (IL2), 1-octyl-3-methylimidazolium tetrafluoroborate (IL3), and 1-dodecylimidazolium tetrafluoroborate (IL4) with different contents were added to a polyimide matrix, and a series of polyimide membranes blended with ionic liquid were prepared using a high-speed mixer. The mechanical properties and gas separation permeability of the membranes were investigated. Among them, the selectivity of the PI/IL3membrane for CO2/CH4was 180.55, which was 2.5 times higher than the PI membrane, and its CO2permeability was 16.25 Barrer, which exceeded the Robeson curve in 2008; the separation performance of the membrane was the best in this work.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Shujie Liang,Jiaxin Lv,Yishun Wang,Hong Deng
The development of efficient and stable single-atom catalysts (SACs) for CO 2 photoreduction is a persistent challenge. This study reports the successful preparation of SACs by incorporating isolated Ni atoms into carbon nanorods through a low-temperature calcination process using nickel bis(dimethylglyoximate) complexes. These Ni atoms, maintaining their original coordination environments, can facilitate charge separation, and enhance CO 2 adsorption and activation. The optimized catalyst exhibits a CO formation yield of 24.4 µmol with ∼96 % selectivity in high-purity CO 2 , outperforming both the precursor and pure carbon. Additionally, the Ni SACs showed strong catalytic selectivity in diluted CO 2 conditions, with selectivity rates of 82.57 %, 80.35 %, and 61 % at 0.1, 0.05, and 0.01 atm, respectively. This work provides critical insights for designing efficient visible light-responsive CO 2 photoreduction catalysts at the atomic level.
研究领域:
材料科学
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环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Yubin Wang,Zifei Yan,Jian Deng,Guangsheng Luo
Microdevices are becoming a hot technology for process intensification of CO 2 capture. However, most microdevices are limited to a small handling capacity, low volume gas to liquid ratio, and cocurrent flow mode. In this context, we proposed a miniaturized annular rotating device ( m -ARD), which has a high handling capacity, can be employed for high volume ratios of gas to liquid, and utilizes a countercurrent flow mode. Variables were investigated to determine the flow characteristic, absorption efficiency of CO 2 , and volume mass transfer coefficient. The gas hold-up and specific surface area in the m -ARD were up to 43.8 % and 1000 m 2 /m 3 , and low pressure drop was observed. Notably, the optimal volume gas to liquid phase ratio, absorption efficiency of CO 2 , and overall volumetric mass transfer coefficient were close to 200 %, 100 %, and 0.53 s −1 , respectively. Furthermore, two dimensionless equations were built to predict the volumetric mass transfer coefficient and gas hold-up. In addition, the contributions of the specific surface area and mass transfer coefficient for enhancing CO 2 absorption were discussed, respectively. This work provides a prospective device for enhancing CO 2 capture and other gas–liquid separation and reaction processes.
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
·
2016
·
IF 4.292
Dong Fu,Pan Zhang,ChenLu Mi
The absorption of CO 2 in tetramethylammonium glycinate ([N 1111 ][Gly]) promotedMDEA (methyldiethanolamine) aqueous solution was investigated. The temperature ranged from 303.2 K to 323.2 K. The mass fractions of MDEA and [N 1111 ][Gly] respectively ranged from 0.3 to 0.45 and 0.05 to 0.15. The influences of temperature and concentration on the absorption capacity of CO 2 were determined. The viscosities of CO 2 -unloaded and CO 2 -loaded MDEA-[N 1111 ][Gly] aqueous solutions were measured and correlated. The experiments showed that the absorption rate of CO 2 obviously increased when the MDEA aqueous solution was promoted by [N 1111 ][Gly]. The effects of temperature, concentration and solution viscosity on the absorption rate were illustrated.
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
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Fengchun Gong,Zhen Huang,Xiaolan Wei,Shule Liu,Jianfeng Lu,Jing Ding,Weilong Wang
Rapid and strong CO 2 capture is critical in CO 2 capture and utilization (CCU) techniques to mitigate global warming. Alkali molten salt (AMS) promoted-MgO sorbents with high capacity attracted attention, but their applications suffer from various limitations of low adsorption kinetics and poor stability. Here, AMS-promoted MgO sorbents corporation with Fe 2 O 3 (Mg 100-x Fe x -AMS 10 ) were fabricated via modified methanol evaporation-induced surface precipitation for use in rapid and stable CO 2 capture. Based on characterization of the sorbents, Mg 98 Fe 2 -AMS 10 showed a loose flake structure, with a large surface area and numerous exposed active sites. Therefore, Mg 98 Fe 2 -AMS 10 exhibited a strong CO 2 capacity (14.86 mmol CO2 /g sorbent at 300 °C) and good cyclic durability. Three kinetic models were explored, and the Avrami model provided a good prediction of the CO 2 adsorption behavior, with Mg 98 Fe 2 -AMS 10 exhibiting rapid adsorption kinetics. The adsorption mechanism was investigated using density functional theory (DFT) calculations. The charge transfer and bonding strengths of the surface O atoms on MgO increased, and these atoms preferentially bonded with activated CO 2 (CO 2 ∙− ) under Fe catalysis. This study may provide insights into enhancing the CO 2 capture and kinetics of MgO via combination with 3d transition metals.
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
Polymers
·
2024
·Vol. 16
·期 15
·2191
·
IF 4.7
Mingxi Liu,Kaoping Song,Longxin Wang,Hong Fu,Jiayi Zhu
Since reservoirs with permeability less than 10 mD are characterized by high injection difficulty, high-pressure drop loss, and low pore throat mobilization during the water drive process, CO2is often used for development in actual production to reduce the injection difficulty and carbon emission simultaneously. However, microfractures are usually developed in low-permeability reservoirs, which further reduces the injection difficulty of the driving medium. At the same time, this makes the injected gas flow very fast, while the gas utilization rate is low, resulting in a low degree of recovery. This paper conducted a series of studies on the displacement effect of CO2-soluble foaming systems in low-permeability fractured reservoirs (the permeability of the core matrix is about 0.25 mD). For the two CO2-soluble blowing agents CG-1 and CG-2, the effects of the CO2phase state, water content, and oil content on static foaming performance were first investigated; then, a more effective blowing agent was preferred for the replacement experiments according to the foaming results; and finally, the effects of the blowing agents on sealing and improving the recovery degree of a fully open fractured core were investigated at different injection rates and concentrations, and the injection parameters were optimized. The results show that CG-1 still has good foaming performance under low water volume and various oil contents and can be used in subsequent fractured core replacement experiments. After selecting the injection rate and concentration, the blowing agent can be used in subsequent fractured cores under injection conditions of 0.6 mL/min and 2.80%. In injection conditions, the foaming agent can achieve an 83.7% blocking rate and improve the extraction degree by 12.02%. The research content of this paper can provide data support for the application effect of a CO2-soluble blowing agent in a fractured core.
研究领域:
石油工程
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化学工程
✓ 已验证
DOI
PubMed
高影响因子
ENERGY
·
2022
·
IF 8.857
Haorui Liu,Shuoyu Wang,Xiaoqiong Wang,XiaoJing Feng,Shuixia Chen
A novel stable porous solid amine adsorbent with three-dimensional interpenetrating network structure was prepared by polymerization of divinylbenzene using high internal phase emulsion (HIPE) template method , and followed by further introducing polyethyleneimine (PEI) by impregnation-crosslinking method. Fixed bed dynamic adsorption experiment proved that under wet condition, the former exhibited not only a higher capacity of 6.22 mmol/g but also a better adsorption kinetics process with faster adsorption rate and longer lag in breakthrough point, which makes it potential to be used in gas separation. In CO 2 /CH 4 separation experiment, PolyHIPE-PE30-4 showed a CO 2 /CH 4 separation selectivity of 253 at 298 K and 1 bar, and meanwhile exhibited an extra-high operating capacity. The pure methane productivity of PolyHIPE-PE30-4 was 24.1 mmol/g from CO 2 /CH 4 (80:20, v/v) mixed gas, 4.5 times to that of PE30-4 gel (5.36 mmol/g). Significantly, PolyHIPE-PE30-4 could maintain an excellent regeneration performance after at least 7 cycles, while PolyHIPE-P30 exhibited a remarkably decrease in adsorption capacity after only three adsorption-desorption process in wet condition, demonstrating the advantage of impregnation-crosslinking method for amine functionalization. The superior CO 2 adsorption capacity and regeneration stability, combined with its superior adsorption kinetics property make it a broad prospect in the field of CO 2 /CH 4 separation.
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
·
2024
·
IF 8.1
Bin Liu,Yanan Yu,Zijian Liu,Zhe Cui,Wende Tian
In this study, a quantitative structure–property relationship (QSPR) model has been designed based on machine learning (ML) to offer a new method to accurately predict carbon dioxide (CO 2 ) solubility in aqueous amine solutions. Molecular descriptors are used to denote representative features of the amine molecular structure supplemented with amine solution concentration, CO 2 partial pressure, and temperature as inputs to the model. The coefficient of determination ( R 2 ) of the well-trained ML model reaches 0.971, and the average absolute deviation (AAD) of independent experimental validation is 4.785 %, effectively demonstrating the model’s reliability and generalization performance. Finally, SHapley Additive exPlanations (SHAP) is adopted to reveal the contribution of different features to the model predictions, making the model more transparent and interpretable. Overall work provides a novel, low-cost, efficient method to predict equilibrium CO 2 solubility in aqueous amine solution and offers a new perspective in developing advanced amine for CO 2 capture.
研究领域:
化学工程
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环境科学
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数据科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Haodong Zhang,Min Chen,Weiming Qian,Jianghao Zhang,Xueyan Chen,Xiaoxiao Qin,Minmin Liang,Changbin Zhang
The hydrogenation of CO2 to produce valuable chemicals through photocatalytic or photothermal technologies represents a viable path toward carbon neutrality. However, typical nanosemiconductor materials, such as TiO2, often exhibit limited activity, necessitating the optimization of their performance as a key research priority. Here, we demonstrate that the size of anatase TiO2 significantly influences its performance in the selective photocatalytic and photothermal reduction of CO2 to CO. The small-sized TiO2 (S-TiO2, 15 nm) exhibits a low CO yield of 32.7 μmol g–1 h–1 and shows almost no photothermal synergy. In contrast, the large-sized TiO2 (L-TiO2, 160 nm) demonstrates a high CO yield of 185.3 μmol g–1 h–1 and significant photothermal synergy, with the CO yield reaching 438.7 μmol g–1 h–1. We reveal that L-TiO2 is well-crystallized and has a higher conduction band position compared to the S-TiO2. This results in a higher charge separation efficiency and more effective photoexcited electrons for CO2 reduction. Additionally, the external heating primarily enhances the charge separation in L-TiO2, significantly improving the conversion of CO2 to CO. This work provides insights into the relationship between the structure and activity of TiO2 in photocatalytic and photothermal CO2 reduction.
研究领域:
材料科学
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环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
ENERGY & FUELS
·
2025
·
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
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2020
·
IF 5.578
Bowen Lu,Zewu Zhang,Xiaoshan Li,Cong Luo,Yongqing Xu,Liqi Zhang
Cu catalysts have been widely used in CO 2 utilization due to their low reduction temperature and excellent CO 2 hydrogenation performance. It is important to well design Cu catalyst with high efficiency and durability for CO 2 hydrogenation. In this work, CuCe(rod) catalysts with various Cu contents were prepared. The physicochemical properties of the CuCe(rod) catalysts were described by XRD, TEM, N 2 -physisorption and H 2 -TPR.The effect of Cu content on catalytic performance of CO 2 hydrogenation with CuCe(rod) catalysts was also studied. Results showed that a high Cu content enhanced CO 2 conversion. The 40CuCe(rod) catalyst exhibited the best CO 2 conversion performance. At the reaction temperature of 400 °C, the CO production rate (CO 2 conversion) and CO selectivity based on the 40CuCe(rod) catalyst could reach 1.69 mol/g cat /h (41.1%) and nearly 100%, respectively. The analysis of kinetic measurements revealed that the activation energy of the 40CuCe(rod) catalyst was lower than that of other catalysts with different Cu contents during a reverse water–gas shift reaction. The lower activation energy and the interface structure of Cu-O x -Ce were closely related to CO 2 hydrogenation activity and remarkable stability for 96 h with minimal loss of CO 2 conversion activities.
研究领域:
化学工程
·
环境科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）