SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Zewen Xu,Pei Li,Hao Guo,Shengchao Zhao,Kuo Chen,Xinliang Liu,Ming Wang,Yingfei Hou
Excessive carbon emission leads to global warming, threatening human survival. Membrane-based carbon capture technology is an important component of carbon capture, utilization, and storage (CCUS) technology and one of the main upstream technologies for achieving carbon neutrality. PIM-1 materials exhibit high CO 2 permeability but lower CO 2 /N 2 selectivity, making it a significant focus to improve CO 2 /N 2 selectivity without sacrificing CO 2 permeability. In this work, Noria was introduced as a block through the bottom-up approach into the PIM-1 molecular chain, forming Noria-based porous organic polymer (NPOP) microregions with excellent CO 2 affinity. Additionally, the presence of NPOP increases the interchain gaps, resulting in a higher free volume. Consequently, the separation membrane prepared under optimal conditions broke the 2008 upper bound, with a 43.6 % increase in CO 2 permeability and a 41.7 % increase in CO 2 /N 2 selectivity. Furthermore, NPOP could form colloidal networks and provide rigidity to the separation membrane, endowing it with excellent aging resistance. After 6 months of aging, the CO 2 permeability of 0.5 %Noria decreased by only 33.4 % (67.4 % for pure PIM-1), indicating its strong potential for widespread applications.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
Green Chemical Engineering
·
2021
·
IF 0
Qingping Xin,Xueting Cao,Dandan Huang,Shuo Li,Xinghui Zhang,Guangyu Xuan,Mengting Wei,Lei Zhang,Xiaoli Ding,Yuzhong Zhang
One type of new light-responsive hierarchical metal organic framework (MOF) has been successfully prepared using Co(NO 3 ) 3 ·6H 2 O as the metal salt and 4,4′-azobenzenedicarboxylic acid as the ligand by microwave method for the first time. It is found that MOF [Co(AzDC)] exhibits a light-responsive characteristic to SO 2 adsorption due to the presence of azo group from the ligand. The light-responsive hierarchical MOFs are incorporated into Matrimid® 5218 (PI) matrix to prepare mixed matrix membranes (MMMs) for gas separation application. The morphology, crystallinity, chain mobility and thermal stability of MMMs are explored. Results show that Co(AzDC) may elevate both the CO 2 (SO 2 ) permeability and CO 2 (SO 2 )/N 2 selectivity of the MMMs. In particular, the Co(AzDC) doped MMMs exhibit the significantly improved CO 2 (SO 2 )/N 2 selectivity from 33 (123) for PI control membrane to 78 (420) for MMMs, overcoming the 2008 Robeson upper bound for CO 2 /N 2 system. Size-sieving effect of Co(AzDC) with pore size 0.35 nm enhances the selectivity, while the –N=N– group from Co(AzDC) shows affinity to CO 2 molecular rather than N 2 , also elevating selectivity of MMMs. In brief, enhanced selectivity of high-performance membrane is attributed to incorporation of Co(AzDC) particles, which displays synergistic effects both in size-sieving and CO 2 -philic interaction for CO 2 /N 2 separation. Smart highly selective interface is constructed in MMMs by switching the configuration of MOFs from cis to trans . The SO 2 permeability and SO 2 /N 2 selectivity of MMMs are investigated under both visible light and ultraviolet light states, and the SO 2 /N 2 separation performance under visible light is notably improved in comparison with that under ultraviolet light state.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
ChemSusChem
·
2024
·
IF 7.5
Lixinyu Wang,Shangwen Zha,Shenxiang Zhang,Jian Jin
Graphical A highly stable, CO 2 facilated transport membrane that can operate at simulated flue gas conditions with temperature up to 90 °C and high humidity is reported. The mobile amine-carriers for CO 2 were stablized within the sulfonated chitosan ion gel membrane. By virtue of carrier-facilitated transport, high CO 2 permeance (as high as 1155 GPU) and ultrahigh CO 2 /N 2 selectivity (above 550) were achieved. Capturing carbon dioxide (CO 2 ) from flue gases is a crucial step towards reducing CO 2 emissions. Among the various carbon capture methods, facilitated transport membranes (FTMs) have emerged as a promising technology for CO 2 capture owing to their high efficiency and low energy consumption in separating CO 2 . However, FTMs still face the challenge of losing mobile carriers due to weak interaction between the carriers and membrane matrix. Herein, we report a sulfonated chitosan (SCS) gel membrane with confined amine carriers for effective CO 2 capture. In this structure, diethylenetriamine (DETA) as a CO 2 -mobile carrier is confined within the SCS gel membrane via electrostatic forces, which can react reversibly with CO 2 and thus greatly facilitate its transport. The SCS ion gel membrane allows for the fast diffusion of amine carriers within it while blocking the diffusion of nonreactive gases, like N 2 . Thus, the prepared membrane exhibits exceptional CO 2 separation capabilities when tested under simulated flue gas conditions with CO 2 permeance of 1155 GPU and an ultra-high CO 2 /N 2 selectivity of above 550. Moreover, the membrane retains a stable separation performance during the 170 h continuous test. The excellent CO 2 separation performance demonstrates the high potential of gel membranes for CO 2 capture from flue gas.
研究领域:
材料科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Min Deng,Jing Wei,Zikang Qin,Zheng Yan,Junfeng Zheng,Lin Yang,Lu Yao,Wenju Jiang,Zhongde Dai
Styrene-butadiene-styrene triblock copolymer (SBS) has attracted increasing research attention due to its low cost, excellent mechanical properties, and superior gas permeability performance. In this work, a series of novel SBS doped membranes were prepared by introducing polyphosphoric acid (PPA), lithium 2,2,2- trifluoroacetate (TFALi), and 1,3-dichloro-1,1,3,3-tetraisopropyldisiloxane (Siloxane-Cl) into SBS as dopants. The results indicated that the addition of dopants into SBS membranes simultaneously enhanced the CO 2 permeability and CO 2 /N 2 selectivity of SBS membranes. Specially, doping Siloxane-Cl expanded the d-spacing, introduced flexible siloxane (Si-O) groups to enlarge molecular spaces, and formed more crosslinked network structure. Therefore, the SBS/Siloxane-20 membrane showed an approximately 4-fold increase CO 2 permeability compared to the pristine SBS membranes (from 203.3 to 842.9 barrer), accompanied by an increase in CO 2 /N 2 selectivity from 15.8 to 22.0. The obtained membranes also exhibited attractive anti-plasticization and anti-physical aging properties, no obvious decline in CO 2 permeability and/or CO 2 /N 2 selectivity can be observed after 1-week continuous permeation test, making them promising candidates for CO 2 /N 2 separation.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
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IF 15.1
Jian Guan,Xiangzeng Wang,Jingcheng Du,Quansheng Liang,Wen He,Ying Liu,Ji Ma,Chunwei Zhang,Jiangtao Liu
Polymers of intrinsic microporosity (PIMs) are promising candidates for carbon dioxide (CO 2 ) separation and capture from flue gas or natural gas. PIM-1, which has excellent gas permeation properties over the Robeson upper bound (1991), has been widely functionalized to further enhance the CO 2 permeability or selectivity. In this work, a simple and readily processive surface modification method has been proposed via hydrolysis of the PIM-1 membrane. The two hydrolysis processes by the acid method, amidation and carboxylation processes, have been conducted to functionalize the surface of PIM-1 membranes forming N A -PIM-1 and C A -PIM-1 membranes. The TGA, FT-IR spectra and NMR results verify that the composition and structure inside the PIM-1 membrane remain unchanged. XPS and NMR spectra demonstrate that the nitrile group at the surface was successfully functionalized with an amine group or carboxyl group. The CO 2 permeability and CO 2 /N 2 selectivity of the N A -PIM-1 membrane both increased to 4593.2 Barrer and 28.5, respectively. Another advantage of N A -PIM-1 membranes is the coordination site from introduced nitrogen atoms with zinc ions to form N A -PIM-1-Zn, which could further react with PEI to introduce amine-rich groups on the surface of the PIM-1 membrane. The CO 2 /N 2 selectivity of the N A -PIM-1-Zn-PEI membrane coated with PEI on the surface increases 45.4% compared to the unmodified PIM-1 membranes, with CO 2 permeability decreasing only 15.5% compared to the unmodified PIM-1 membrane. The N A -PIM-1 and N A -PIM-1-Zn-PEI membranes both surpass the Robeson upper bound (2008) even under mixed gas feeding, suggesting that surface modification of PIM-1 is a promising approach for CO 2 capture from natural gas and flue gas.
研究领域:
材料科学
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环境工程
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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
Meixue Zhao,Jianping Guo,Qingping Xin,Yanli Zhang,Xu Li,Xiaoli Ding,Lei Zhang,Lizhi Zhao,Hui Ye,Hong Li,Guangyu Xuan,Yuzhong Zhang
Membrane separation is a novel technology that has been widely studied for efficient CO 2 capture. This study aims to synthesize novel porous amino-functionalized nanosheets using PEI (polyethyleneimine) (PEI-F-Ce) and PEI-F-Ce/polyethylene oxide (PEO) mixed matrix membranes (MMMs). PEI-F-Ce nanosheets were prepared via the electrostatic self-assembly method, allowing for the adjustment of both lateral and pore sizes of the nanosheets by varying the PEI concentration. The MMMs loaded with 2 % PEI-F-Ce-2.5 nanosheets exhibit excellent CO 2 permeability (641 Barrer) and outstanding CO 2 /N 2 selectivity (70.1). These values surpassed those of pure PEO membranes by 62 % and 53 %, respectively, exceeding the 2019 upper bound. PEI-F-Ce-2.5 nanosheets with a stable pore channel 3.406 nm improved CO 2 transport and showed a large CO 2 adsorption capacity of 1.32 mmol g −1 , leading to enhanced the CO 2 /N 2 reaction selectivity. Moreover, the reversible reaction of CO 2 with –NH 2 enhanced the CO 2 /N 2 selectivity by 5.1 times at −20 °C, thereby highlighting its potential for cryogenic gas separation applications.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2020
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IF 7.183
Rong Rong,Yanwei Sun,Taotao Ji,Yi Liu
Zirconium-based MOF (Zr-MOF) membranes have attracted widespread attention due to their highly tailorable pore aperture and adsorption behavior achieved by functional group decoration and ligand/cluster-missing defect regulation as well as extraordinary chemical/thermal stability. Nevertheless, it has remained a great challenge to further improve the separation performance of Zr-MOF membranes due to very limited available zirconium sources and heating modes. In this study, we prepared polycrystalline UiO-66 membranes exhibiting unprecedented CO 2 /N 2 selectivity (31.3). The use of layered ZrS 2 , a representative of transition-metal dichalcogenides (TMDCs), as zirconium source during tertiary solvothermal growth was found to be indispensable for improving the separation performance of UiO-66 membranes. As far as we know, the CO 2 /N 2 selectivity reported in this study was the highest among all pristine polycrystalline MOF membranes measured under ambient conditions. More importantly, our study highlighted the importance of concurrent metal source and fabrication process innovation in performance enhancement of polycrystalline MOF membranes.
研究领域:
材料科学
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化学工程
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膜技术
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2022
·
IF 9.136
Yonghong Wang,Zhuo Jin,Xinru Zhang,Jinping Li
The incorporation of lamellar materials into polymer matrix can improve the gas separation performance of mixed matrix membranes (MMMs), which have great potential in chemical separation process. However, few intrinsic selectivity sites on MoS 2 sheets suppress further employment in the membrane separation. In this work, the vacancies and defects-containing MoS 2 sheets were prepared by high temperature oxidation and hydrothermal reaction in NaOH solution, and then L-cysteine-functionalized MoS 2 (Cys-MoS 2 ) was synthesized by a thiol-click chemistry reaction between S vacancies and thiol groups as confirmed by transmission electron microscope (TEM), Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and N 2 absorption. After blending with polyether-block-amide (Pebax), the as-prepared MMMs showed outstanding mechanical properties as a result of the homogeneous dispersion of Cys-MoS 2 and hydrogen bonding between two phases as evidenced by attenuated total reflectance-FTIR, scanning electron microscope (SEM), thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). The highest permeability of 297 Barrer accompanied with a CO 2 /N 2 selectivity of 120 was obtained for MMMs loaded with 1.5 wt% Cys-MoS 2 , which were enhanced by 206.2 % and 124.7 % over the pristine Pebax membrane, respectively. Meanwhile, this value was superior to that of the previously reported Pebax-based MMMs, transcending 2019 upper bound. The enhanced gas separation performance is due to the improved CO 2 adsorption selectivity by the vacancies and defects of Cys-MoS 2 , while the amine groups carrier enhanced CO 2 reactivity selectivity.
研究领域:
材料科学
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化学工程
✓ 已验证
DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2022
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IF 5.477
Peizhi Cao,Zhe Wang,Liying Liu,Peng Gao,Guo Tian,Haoran Liu,Jiaxin He
Background Cobalt has a high polarizability and can form a high dispersion potential energy on the surface of zeolite, which is conductive to the capture of CO 2 . Methods For the first time, cobalt-silicon molecular sieves (CSMS) were synthesized by hydrothermal method using cobalt nitrate as the cobalt source and sodium silicate as the silica source without organic template. Significant findings The effects of pH values on the synthesis of molecular sieves were investigated, and the sample CSMS-12 which synthesized at pH = 12, showed the highest specific surface area and pore volume. The specific surface area (S BET ) and Total volume (V Total ) of CSMS-12 are 452.8 m 2 ·g −1 and 0.4 cm 3 ·g −1 , respectively. The result of adsorption test at 273 K and 100 kPa shows that CSMS-12 has the highest CO 2 uptake (1.86 mmol·g −1 ), and the Dual-site Langmuir isotherm model fits well with the experimental result. CSMS-12 has excellent adsorption selectivity (123) of CO 2 /N 2 calculated by IAST method. Furthermore, fixed-bed adsorption breakthrough experiments were carried out to investigate the performance of dynamic CO 2 /N 2 and CO 2 /CH 4 separation by CSMS-12 at different temperatures. The above results indicate that it can be applied to the separation of CO 2 in flue gas and biogas.
研究领域:
材料科学
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环境化学
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能源工程
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吸附分离
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多孔材料
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 33
·e52810
·
IF 3.057
Zhirong Hu,Jiayu Miu,Xiong-Fei Zhang,Mingmin Jia,Jianfeng Yao
UiO-66-NH 2 (Zr-based metal organic framework) is integrated into cellulose acetate (CA) to fabricate mixed matrix membranes (MMMs) through solvent-casting approach. To regulate the interfacial compatibility and suppress the non-selective voids, UiO-66-NH 2 with different particle sizes are investigated. The introduction of UiO-66-NH 2 provides additional pathways for gas molecules and renders the membrane with high CO 2 affinity, substantially augmenting the separation efficiency of UiO-66-NH 2 @CA composite membrane. By optimizing the particle size of UiO-66-NH 2 , the non-selective voids and the particle agglomeration can be effectively restricted. The optimum separation performance is obtained by U-100@CA membrane (UiO-66-NH 2 : 200 nm in size), exhibiting a CO 2 permeability of 168.8 Barrer with CO 2 /N 2 and CO 2 /CH 4 ideal selectivities of 40.2 and 51.3, respectively. The separation mechanism is ascribed to the presence of sufficient amine groups, the high CO 2 solubility of CA matrix, and superior inorganic–organic interfacial property.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Pengcheng Ma,Wanshuang Zhou,Cong Yu,Zhuang Liu,Qiang Chen,Shi-Peng Sun,Xinbo Wang
Efficient CO 2 capture and separation are essential to enhance natural gas utilization and reduce coal-fired flue gas emissions, mitigating the climate change. Here, we introduce a novel acid-base dual-functional synergistic adsorption strategy by synthesizing a hypercrosslinked porous polymer (HCP-A-S) containing both amino and sulfonic acid functionalities. The material exhibits 0.34-nm ultramicropores and cooperative –NH 2 /–SO₃H groups that preferentially adsorb CO 2 , with CO 2 uptake and CO 2 /N 2 selectivity doubling that of the corresponding single-site HCP. DFT calculations reveal that the negatively charged amino groups and sulfonic acid moieties synergistically enhance CO 2 affinity through strong electrostatic and dipole–quadrupole interactions, facilitating highly selective capture. Dynamic breakthrough experiments confirm HCP-A-S's superior CO 2 /N 2 separation performance, high working capacity, and excellent recyclability. This dual-polar-site approach overcomes limitations of traditional single-site adsorbents and offers a cost-effective, scalable pathway to high-performance carbon capture materials.
研究领域:
材料化学
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环境科学
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化学工程
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能源化学
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吸附分离
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碳捕集与封存
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POROUS MATERIALS
·
2025
·
IF 3.2
Shen Fumin,Yao Shunyang,Pei Yuanchao,Sun Rubin
The increasing levels of carbon dioxide (CO 2 ) emissions driven by industrial activities highlight the urgent need for the development of efficient and sustainable CO 2 capture technologies. Biomass-derived porous carbons have emerged as promising candidates for CO 2 adsorption due to their low cost, high surface area, and adjustable pore structure. In this study, hierarchically porous carbons (HPCs) were synthesized from waste acer truncatum wood through pre-carbonization and subsequent KOH activation. The synthesis conditions, including activation temperature and activating agent concentration, were optimized to precisely tailor the pore architecture. The resulting HPC exhibited excellent CO 2 adsorption capacities of 7.56 mmol·g⁻ 1 at 0 °C and 4.29 mmol·g⁻ 1 at 25 °C under ambient pressure. Notably, ultramicropores (< 0.7 nm) exhibited a dominant role in CO 2 capture at low pressures, while narrow micropores (< 1.0 nm) contributed significantly across a range of low-pressure conditions. The hierarchical pore structure enhanced CO 2 uptake at higher pressures. Furthermore, the material demonstrated exceptional CO 2 /N 2 selectivity, reaching up to 112 at 0.15 bar and 0 °C, along with good cyclic stability, highlighting its potential in post-combustion CO 2 capture. This work provides a sustainable strategy for converting waste biomass into high-value adsorbents, offering a solution that addresses both environmental concerns and economic feasibility.
研究领域:
环境科学
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材料科学
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碳材料
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气候变化缓解
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吸附技术
✓ 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）