ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
·
2023
·Vol. 48
·期 12
·16471-16482
·
IF 2.9
Zainuddin Muhd Izzudin Fikry,Ahmad Abdul Latif,Subramaniam Reasmyraj R.
Carbon dioxide (CO 2 ) separation with membrane technology has become the focus of researchers over the past decades due to its lower energy consumption and cheaper alternative. Mixed matrix membrane (MMM) of poly(4-methyl-1-pentene) (PMP) with nano fumed silica particles was studied to determine the feasibility of using MMM to separate CO 2 from nitrogen (N 2 ) gas. The critical concentration of PMP (7 wt%) was utilized to form the membrane in this study in order to ensure the polymer chain entanglement occurs to form a dense structure. Agglomeration of particle can be observed on the surface with scanning electron microscopy (SEM) imaging with 10 and 15 wt% of nano fumed silica loading in PMP matrix. This observation is further confirmed with energy-dispersive X-ray (EDX) mapping across the cross-sectional area which shows clustered nano fumed silica particle with loading of 10 and 15 wt%. With 7.5 wt% filler loading and at 1 bar, the MMM seems to give the best gas permeance performance with CO 2 permeance of 4.62 GPU (100.54 Barrer) and N 2 permeance of 0.20 GPU (4.31 Barrer) which makes the highest ideal selectivity to be about 23, which was the highest ideal selectivity achieved in this study. Meanwhile, when the pressure was increased from 1 to 7 bar, the CO 2 permeability increased almost linearly followed by a steady decline in CO 2 /N 2 ideal selectivity.
研究领域:
膜技术
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气体分离
·
高分子科学
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纳米复合材料
·
环境工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2020
·
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
·
化学工程
·
膜技术
✓ 已验证
DOI
高影响因子
POLYMER SCIENCE SERIES A
·
2018
·Vol. 60
·期 5
·612-617
·
IF 0.729
Wang Jinjing,Wang Huifeng,Li Yan,Tian Li,Chen Shanmin,Liu Qiang,Guo Zhen
A novel copolymer surfactant has been prepared via a free radical copolymerization of CO 2 -switchable monomer N , N -diethylaminoethyl methacrylate and the hydrophilic monomer sodium vinyl-sulfonate and characterized. The results of conductivity, dynamic light scattering and cryogenic transmission electron microscopy study showed the change of the microstructure of copolymer in water by adding or removing of CO 2 . The copolymer aqueous solution was found to exhibit reversible switchability by the bubbling of CO 2 /N 2 .
研究领域:
高分子化学
·
材料科学
✓ 已验证
DOI
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Cong Jiang,Zong Meng
The development of green and efficient catalytic systems is crucial for sustainable chemical processes. This study engineered shellac nanoparticle-lipase conjugates for biphasic biocatalysis. Taking advantage of the inherent amphiphilicity and pH-triggered interfacial behavior of the shellac, the conjugates exhibited dual functionality as intelligent Pickering emulsifiers and interfacial biocatalysts. The covalent conjugation strategy achieved a protein loading capacity of 107.97 ± 5.24 mg/g under optimized conditions while preserving interfacial responsiveness. Reversible emulsification/breaking transitions were precisely regulated at least 30 times through pH adjustment or alternating CO₂/N₂ treatments, enabling convenient catalyst recovery. When applied to the esterification of phytosterols with oleic acid, the conjugates exhibited a higher esterification rate (78.93 %, 1.5-fold enhancement compared with the free lipase), retained 85.0 % initial catalytic activity after six consecutive cycles. The responsive Pickering system combined exceptional recyclability and enhanced catalytic performance, providing an innovative pathway for the development of Pickering interfacial catalysis.
研究领域:
绿色化学
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生物催化
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纳米技术
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胶体与界面科学
·
酶工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER
·
2025
·
IF 4.5
Shuang Wang,Dudu Li,Zelong Xu,Fan Zhou,Zhihua Qiao,Zibo Yang,Zhi Wang
Coordination polymer (CP) glasses offer high processability and permanent accessible pores, having promising potential in gas separation. However, their low porosity makes it difficult to prepare high-performance gas separation membranes. In this work, we combined the advantages of CP glasses and inorganic fillers, and selected ag Zn-P-dmbIm as the continuous phase and hydroxylated multi-walled carbon nanotubes (HMWCNTs) as the dispersed phase to prepare HMWCNTs/ ag Zn-P-dmbIm mixed matrix membranes (MMMs). The very favorable interfacial compatibility and excellent CO 2 /N 2 gas separation performance of the MMM-2 membrane were demonstrated by a series of characterizations. The test results revealed that the CO 2 permeability and ideal CO 2 /N 2 selectivity of MMM-2 membrane were 9776.8 Barrer and 31.1, respectively, which exceeded the Robeson 2019 upper bound. In addition, the well-defined long-term stability of the MMM-2 membrane lays the foundation for realizing gas separation membranes for industrial applications in practice. This provides a strategy for the subsequent preparation of CP glasses-based MMMs.
研究领域:
材料科学
·
膜技术
·
气体分离
·
高分子化学
·
纳米复合材料
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2024
·Vol. 53
·期 7
·2957-2963
·
IF 3.5
Peng Zhang,Sai Ma,Yujuan Zhang,Chaohui He,Tuoping Hu
The energy-saving separation of CO2/N2 and CH4/N2 in the energy industry facilitates the reduction of greenhouse gas emissions and replenishes energy resources, but is a challenging separation process. The trade-off between adsorption capacity and selectivity of the adsorbents is one of the key bottlenecks in adsorption separation technologies’ large-scale application in the above separation task. Herein, we introduced a series of fluoroborate or fluorosilicate salts (Cu(BF4)2, Zn(BF4)2 and ZnSiF6) into the open coordination nitrogen sites of aluminum-based metal–organic frameworks (MOF-253) to create multiple binding sites to simultaneously enhance the adsorption capacity and selectivity for the target gas. By the synergistic adsorption effect of metal ions (Cu2+ or Zn2+) and fluorinated anions (BF4− or (SiF6)2−), the single-component adsorption capacity and selectivity of salt-modified MOF-253 (MOF-253@Cu(BF4)2, MOF-253@Zn(BF4)2 and MOF-253@ZnSiF6) for CO2 and CH4 were effectively improved when compared to pristine MOF-253 at 298 K and 1 bar. In addition, the salt-modified MOF-253 has a moderate adsorption heat (<30 kJ mol−1) which could be rapidly regenerated at low energy by evacuation desorption. As confirmed by the ambient breakthrough experiments of MOF-253 and MOF-253@ZnSiF6, the real separation performance for both CO2/N2 (1/4) and CH4/N2 (1/4) was obviously improved. This work provides a feasible post-modification strategy on uncoordinated sites of the framework to improve adsorption separation performance and promote the development of ideal adsorbents with a view to realizing their application in the energy industry.
研究领域:
化学工程
·
材料科学
·
环境科学
·
能源工业
✓ 已验证
产品关联
DOI
PubMed
高影响因子
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
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2024
·
IF 6.9
You-yun Gong,Zi-ang Jia,Yiwen Fan,Jin-ping Cheng
Rational chemical modification engineering of metal-organic frameworks (MOFs) is an effective means to improve their CO 2 capture efficiency. In this study, we prepare UiO-66 MOF impregnated with different types of aliphatic amines using solvothermal and impregnation techniques, respectively, and investigated their performances in CO 2 adsorption and CO 2 /N 2 separation using the isothermal adsorption method. Aliphatic amines successfully chemically modifies UiO-66, and their molecules effectively occupied the pores of the UiO-66 framework, which has been confirmed by material characterization, experiments, and DFT-FMO calculations. There are significant improvements in the ability to capture CO 2 when aliphatic amines were added to UiO-66 compared to pure UiO-66 (1.39 mmol/g up to 2.11 mmol/g-2.53 mmol/g), attributed to the different types and numbers of amines, and there were also differences in the Zr metal clusters and BDC ligands. Meanwhile, The material has better CO 2 /N 2 adsorption IAST selectivity(98) because its surface area is changed and N 2 does not interact specifically with the adsorbent. Furthermore, the CO 2 adsorption capacity remains constant across multiple adsorption cycles, highlighting the adsorbent's stability and reliability during repetitive CO 2 capture. This study provides new ideas and perspectives for improving the CO 2 capture efficiency of UiO-66.
研究领域:
材料科学
·
环境科学
✓ 已验证
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
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Wenhan Wang,Wenqiang Li,Zijian Wang,Bo Liu,Bing Wang,Jingui Duan,Rongfei Zhou
Carbon dioxide capture is an effective method to mitigate climate change . Highly CO 2 -selective and highly moisture-resistant absorbent is essential for energy-efficient carbon capture by absorption. Herein, a highly CO 2 -selective and high-silica CHA zeolite in a pure lithium form (Li-SSZ-13) was synthesized using a direct synthesis method for the first time. The effects of gel n (SiO 2 )/ n (Al 2 O 3 ) ratio, gel n (SiO 2 )/ n (Li 2 O) ratio and synthesis time on the crystallinity , yield, micropore volume and CO 2 loading of the crystals were systematically investigated. The adsorption isotherms of CO 2 and N 2 were measured for directly synthesized Li-SSZ-13, conventional Na-SSZ-13 and ion-exchanged Li-Na-SSZ-13 zeolites. The dynamic breakthrough adsorption properties were measured for Li-SSZ-13 in comparison with Na-SSZ-13 and Li-Na-SSZ-13. The obtained Li-SSZ-13 exhibited a high CO 2 adsorption capacity of 4.48 mmol/g and a high CO 2 /N 2 IAST selectivity of 310 at 100 kPa and 273 K, which were 45.0 % and 441 % higher than Na-SSZ-13 zeolite, 24.8 % and 179 % higher than Li-Na-SSZ-13 zeolite, respectively. It suggests that directly synthesized Li-SSZ-13 zeolite has great potential for efficient CO 2 capture from flue gas .
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
Frontiers in Chemistry
·
2020
·
IF 3.693
Lai Nanjun,Zhu Qingru,Qiao Dongyu,Chen Ke,Wang Dongdong,Tang Lei,Chen Gang
During CO2 flooding, serious gas channeling occurs in ultra-low permeability reservoirs due to the high mobility of CO2. The chief end of this work was to research the application of responsive nanoparticles for mobility control to enhance oil recovery. Responsive nanoparticles were developed based on the modification of nano-silica (SiO2) by 3-aminopropyltrimethoxysilane (KH540) via the Eschweiler-Clark reaction. The proof of concept for responsive nanoparticles was investigated by FT-IR, 1H-NMR, TEM, DLS, CO2/N2 response, wettability, plugging performance, and core flooding experiments. The results indicated that responsive nanoparticles exhibited a good response to control nanoparticle dispersity due to electrostatic interaction. Subsequently, responsive nanoparticles showed a better plugging capacity of 93.3% to control CO2 mobility, and more than 26% of the original oil was recovered. Moreover, the proposed responsive nanoparticles could revert oil-wet surfaces to water-wet, depending on surface adsorption to remove the oil from the surface of the rocks. The results of this work indicated that responsive nanoparticles might have potential applications for improved oil recovery in ultra-low permeability reservoirs.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）