JOURNAL OF MEMBRANE SCIENCE
·
2022
·
IF 10.53
Ruoxing Liao,Yumin Guo,Liqiu Yang,Haoli Zhou,Wanqin Jin
Membrane technology , a successful technology for separating gases such as CO 2 /CH 4 mixture, has attracted much attention because of its low energy consumption, and membrane performance is an important factor affecting its industrial application. Herein, the solvent-induced microstructure of a polyimide membrane was employed to enhance its CO2/CH4 separation performance. The effect of solvents on the membrane structure and gas separation performance was investigated by using different solvents (such as tetrahydrofuran, N,N-dimethylacetamide) to dissolve a newly synthesized polyimide polymer, which was fabricated into a membrane. Various characterization methods, such as positron annihilation lifetime spectroscopy (PALs) and X-ray diffractometry (XRD), were conducted to reveal changes in the microstructure of membranes prepared with different solvents. The interaction of solvents with groups of polymer backbones was also analyzed for the explanation of the effect of solvents on the membrane performance for the separation of different gas pairs, such as CO2/CH4 mixture. The results showed that a membrane with optimal separation performance was obtained by optimizing the solvent composition, which exceeded the 2018 mixed-gas CO2/CH4 upper bound. The induced effect of solvents on the polymer membrane structure provides a new research path for the optimization of polymer membranes to enhance separation performance.
研究领域:
材料科学
·
化学工程
·
气体分离技术
✓ 已验证
产品关联
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2022
·
IF 5.876
Yanyong Sun,Minmin Gou
Based on the one-dimensional tubular structure of halloysite nanotubes (HNTs), plant polyphenols and polyamines were used for in situ polymerization on the surface of HNTs to form amino-rich polymers, which were then removed as templates to synthesize polymer nanotubes. These nanotubes were then incorporated into a Pebax matrix to prepare mixed-matrix membranes (MMMs) for CO 2 /CH 4 gas separation. The removal of the HNT template increased the lumen diameter of the filler and significantly improved its gas permeability . And the amino groups on the inner surface of the polymer nanotubes were exposed. Further, the number of CO 2 reaction sites increased, which improved the reaction selectivity of CO 2 . In addition, the presence of amine groups on the inner and outer surfaces of the polymer nanotubes provided various transfer channels for CO 2 , which were conducive for CO 2 gas transfer in the membrane. When the CC-PEINT content was 8 wt%, the CO 2 permeability was 710 Barrer and CO 2 /CH 4 selectivity was 60. The CO 2 permeability and CO 2 /CH 4 selectivity of the Pebax/CC-PEINTs membranes increased by 163% and 132%, respectively, compared with those of the pure Pebax membrane.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
Carbon Capture Science & Technology
·
2023
·
IF 0
Wufeng Wu,Jiang Fan,Dongyue Wang,Yali Zhao,Xinglei Zhao,Yanying Wei
MOF membranes exhibit impressive performance in gas separation due to their large surface area, controllable pore size and unique affinity. Here, the ultrathin UiO-66-NH 2 polycrystalline membranes with thickness of ∼320 nm are successfully prepared within 1 h using a combination of ultrasound-assisted and microwave synthesis strategies. During the reaction, high-density small MOF nuclei are produced by sodium formate ultrasound-assisted, which act as sufficient nucleation sites for heterogeneous nucleation during membrane growth, aiming for development of a continuous MOF membrane on the porous substrate. The obtained UiO-66-NH 2 membrane shows an ideal CO 2 /CH 4 selectivity of 40 due to the enhanced the interaction between CO 2 molecules and the membrane. Moreover, the narrowed pore structure further hinders the diffusion of larger-sized molecules owing to -NH 2 occupying the pore channels, resulting in elevated CO 2 /CH 4 selectivity. Compared to many other MOF membranes, the UiO-66-NH 2 polycrystalline membranes exhibit a well balance of gas permeance and CO 2 /CH 4 selectivity, which presents a new route for CO 2 capture.
研究领域:
材料科学
·
化学工程
·
环境科学
✓ 已验证
DOI
JOURNAL OF MEMBRANE SCIENCE
·
2017
·
IF 6.035
Ning Zhang,Dongdong Peng,Hong Wu,Yanxiong Ren,Leixin Yang,Xingyu Wu,Yingzhen Wu,Zihan Qu,Zhongyi Jiang,Xingzhong Cao
For high-performance hybrid membranes, it is crucial to design multi-functional filler to rationally manipulate the structure-property relationship. In this study, a novel kind of hybrid membrane was fabricated by incorporating zinc ion loaded sulfonated pitch (SP-Zn 2+ ) nanofillers into poly (ether-block-amide) (Pebax) matrix for CO 2 /CH 4 separation. Sulfonated pitch (SP) with high sulfonate content was functionalized by zinc ion (Zn 2+ ) via complexation reaction to synthesize SP-Zn 2+ nanofillers with high Zn 2+ loading. Mixed gas separation performances of membranes with different SP-Zn 2+ loading were conducted. Meanwhile, the effect of operating pressure on separation performance and long-term operation stability were investigated. The hybrid membranes displayed significantly enhanced permeability and CO 2 /CH 4 selectivity. First, the hydrophilic sulfonate group in SP had good compatibility with Pebax matrix and effectively suppressed interfacial defects. Second, zinc ions and sulfonate group could form zinc-sulfonate complex network. The sulfonated moiety afforded strong affinity toward CO 2 due to multiple interactions whereas the Zn 2+ moiety afforded a transport highway for CO 2 . Third, the incorporation of SP-Zn 2+ nanofillers could disturb the Pebax chain packing and optimize the free volume characteristics. Particularly, Pebax/SP-Zn 2+ (2) membrane exhibited an increment of 104% and 70.2% in CO 2 permeability and CO 2 /CH 4 selectivity respectively, much higher than that of Pebax membrane.
研究领域:
材料科学
·
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2022
·
IF 10.53
Ke Chen,Linhan Ni,Hao Zhang,Chengming Xiao,Li Li,Xin Guo,Junwen Qi,Chaohai Wang,Xiuyun Sun,Jiansheng Li
Rational design of fillers and polymers is of great importance to fabricate mixed matrix membranes (MMMs) with high performance. In this work, fluorinated metal-organic frameworks (KAUST-7 (also referred as NbOFFIVE-1-Ni)) were adopted as nanofillers to prepare MMMs through physically blending into the polymer of intrinsic microporosity (PIM-1). Benefiting from the features of porous KAUST-7, including well CO 2 affinity, distinctive pore characteristics (size, shape, and functionality) and strong intermolecular interactions with PIM-1, the achieved MMMs demonstrated increased CO 2 /CH 4 separation performance and improved anti-physical aging property. Specifically, with the assistance of KAUST-7, the CO 2 permeability and CO 2 /CH 4 (30:70 vol%) selectivity of the optimized MMMs increased up to 5928 Barrer and 23.5, corresponding to improvements of 50% of and 88% of the permeability and selectivity compared with the pristine membranes, respectively. Importantly, 100-h continuous separation test results confirmed the satisfying long-term stability of the prepared MMMs. Notably, the MMMs maintained 91% of the initial CO 2 permeability after 150 days (decreased only 539 Barrer), implying that the CO 2 permeability decrement is about 5-fold lower than that of the control PIM-1 membrane. These results suggest that the fabricated MMMs are promising candidates for CO 2 separation in practical applications.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Chengli Jiao,Xiangju Song,Xiaoqian Zhang,Lixian Sun,Heqing Jiang
Control of the surface morphology of polyamide membranes fabricated by interfacial polymerization is of great importance in dictating the separation performance. Herein, polyamide membranes with a specific nanoscale striped Turing structure are generated through facile addition of Zr-based metal–organic framework UiO-66-NH2 in the aqueous triethylenetetramine phase. Interestingly, accompanied by the degradation of UiO-66-NH2 in aqueous solution, an intermediate complex is in situ formed through the strong interaction between the Zr metal center and the amine group from triethylenetetramine, which can lower amine diffusion and induce a local interfacial reaction, contributing to the generation of a homogeneous nanoscale striped Turing structure. The resulting membranes are used for CO2/CH4 gas separation. Compared with the parent polyamide membrane displaying a CO2/CH4 selectivity of 43.1 and a CO2 permeance of 31.5 GPU, the membrane with 0.02 wt % of UiO-66-NH2 introduced into the aqueous phase shows a higher CO2/CH4 selectivity of 58.3, along with a CO2 permeance of 27.1 GPU. Additionally, when 0.1 wt % of UiO-66-NH2 is incorporated into the aqueous phase, the membrane exhibits a combination of a higher CO2/CH4 selectivity and an enhanced CO2 permeance in contrast with the parent polyamide membrane.
研究领域:
材料科学
·
化学工程
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Yueyao Liang,Ruquan Zhang,Zhihua Qiao,Chongli Zhong
Supported metal–organic framework (MOF) membranes are promising candidates for energy-efficient natural gas purification, but the preparation of ultrathin MOF membranes supported by polymer substrates remains challenging. Herein, we proposed a polymer collaboration method for preparing ultrathin two-dimensional MOF membranes on polymer support layers. Cu(II) meso-tetra (4-carboxyphenyl) porphyrin (CuTCPP) membranes having thicknesses as low as <10 nm were formed in situ because of the high density of heterogeneous nucleation sites in a polyvinyl alcohol-Cu 2+ interface layer and the controlled anisotropic growth of nanocrystals enabled by a polyvinylpyrrolidone (PVP) surfactant. The prepared CuTCPP membranes showed excellent CO 2 /CH 4 separation performance, yielding a high permeance of 4560 GPU and a moderate selectivity of 31.8. Furthermore, the prepared CuTCPP membranes also displayed good CO 2 /N 2 separation performance, having a CO 2 permeance of 3200 GPU and a CO 2 /N 2 selectivity of 36. The thickness of CuTCPP membranes can be controlled by varying the concentration of metal ions in the organic interface layer. This preparation method can not only fix the active sites for membrane formation but also control the morphology of crystal growth and is applicable to membrane fabrication using other porous MOFs.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Ke Chen,Xin Guo,Linhan Ni,Junwen Qi,Jiansheng Li
Rational design and construction of fillers and polymers are crucial for the development of high-performance mixed matrix membranes (MMMs). In this work, amino-functionalized metal-organic frameworks KAUST-7 (KAUST-7-NH 2 ) with square-shaped sheet morphology were utilized as fillers to fabricate MMMs by physical blending with the polymer of intrinsic microporosity (PIM-1). The square-shaped KAUST-7-NH 2 sheets, prepared via in situ replacement of 2-aminopyrazine into the KAUST-7 framework, exhibited superior separation performance compared to the mono-ligand KAUST-7. Benefiting from the strong CO 2 affinity, high porosity and optimal pore sizes of KAUST-7-NH 2 , the outstanding CO 2 /CH 4 separation performance of the composite membrane was observed. The integration of square-shaped KAUST-7-NH 2 sheets provides a 2.5-fold improvement in CO 2 /CH 4 selectivity together with acceptable gas permeability as compared to the original PIM-1 membrane. Furthermore, a 100-h continuous permeation test validated the stability of the fabricated MMMs. Remarkably, the resulting MMM retained 92% of their initial CO 2 permeability after 150 days (drop of only 249 Barrer), indicating that the reduction in CO 2 permeability was approximately 10-fold lower than that of the pristine PIM-1 membrane. The prepared MMMs exhibit enhanced CO 2 /CH 4 selectivity and long-term stability, making it a highly promising candidate for practical application.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Membranes
·
2021
·Vol. 11
·期 2
·118
·
IF 4.106
Chunwei Zhang,Menglong Sheng,Yaoqiang Hu,Ye Yuan,Yulong Kang,Xiao Sun,Tao Wang,Qinghua Li,Xisen Zhao,Zhi Wang
CO2enhanced oil recovery (CO2-EOR) technology is a competitive strategy to improve oil field economic returns and reduce greenhouse gas emissions. However, the arbitrary emissions or combustion of the associated gas, which mainly consists of CO2and CH4, will cause the aggravation of the greenhouse effect and a huge waste of resources. In this paper, the high-performance facilitated transport multilayer composite membrane for CO2/CH4separation was prepared by individually adjusting the membrane structure of each layer. The effect of test conditions on the CO2/CH4separation performance was systematically investigated. The membrane exhibits high CO2permeance of 3.451 × 10−7mol·m−2·s−1·Pa−1and CO2/CH4selectivity of 62 at 298 K and 0.15 MPa feed gas pressure. The cost analysis was investigated by simulating the two-stage system. When the recovery rate and purity of CH4are 98%, the minimum specific cost of separating CO2/CH4(45/55 vol%) can be reduced to 0.046$·Nm−3CH4. The excellent short-to-mid-term stability indicates the great potential of large industrial application in the CH4recovery and CO2reinjection from oilfield associated gas.Keywords:oilfield associated gas;CO2capture;multilayer composite membrane;facilitated transport;CO2/CH4separation
研究领域:
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 47
·24975-24984
·
IF 14.511
Lili Gong,Zhili Cai,Qi Wu,Lu Liu,Can Wang,Linglong Shan,Xianghai Meng,Shuangjiang Luo,Zhichang Liu,Suojiang Zhang
Mixed matrix membranes (MMMs) are highly promising for natural gas sweetening due to their high microporosity and outstanding gas separation performance. However, MMMs are frequently challenged by the polymer/filler interfacial incompatibility, leading to the deterioration of gas separation performance. In this study, the mixed-linker ZIF-7-8 was employed as a filler by finely tuning the molecular sieving for CO2/CH4 separation. An amino-functionalized ionic liquid ([C3NH2Mim][Cl]) was introduced for constructing the interface connection between the ZIF-7-8 filler and polymer matrix through coordination and hydrogen bonding, which was verified by extended X-ray absorption fine structure (EXAFS) and electron paramagnetic resonance (EPR). The design of interface interaction through an IL is crucial to improve the interface compatibility and the CO2/CH4 separation performance. The newly developed 20% ZIF-7-8-IL (1%)/PI and 25% ZIF-7-8-IL (1%)/PI MMMs displayed a dramatic improvement of CO2 permeability by 244.2% and 291.6%, from 308 to 1060 and 1206 barrer, respectively, for pure-gas separation, compared to the pristine polyimide matrix. Moreover, the 25% ZIF-7-8-IL (1%)/PI MMM also demonstrated outstanding low-temperature mixed-gas CO2/CH4 separation performance in the temperature range of −45–35 °C, far beyond the 2018 mixed-gas CO2/CH4 upper bound.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Zhenggang Wang,Jianwei Yuan,Renhao Li,Haipeng Zhu,Jingui Duan,Yanan Guo,Gongping Liu,Wanqin Jin
Compared with traditional separation methods, membrane-based technology shows advantages in energy efficiency for natural gas purification. To overcome the performance trade-off of conventional polymeric membranes, in this study, ZIF-301 MOF was employed as novel filler to fabricate 6FDA-DAM polyimide mixed-matrix membranes (MMMs) for CO 2 /CH 4 separation. A solvent exchange approach was proposed to remove the high-boiling-point solvent used for fabricating the MMMs. The microstructures and physico-chemical properties of the ZIF-301 fillers and ZIF-301/6FDA-DAM MMMs were characterized by SEM, EDX, XRD, IR, TGA, DSC and high-pressure sorption isotherms. The CO 2 /CH 4 transport properties through the MMMs were evaluated by permeation measurement at various feed pressures and analyzed by solution-diffusion model. The results showed that the incorporation of ZIF-301 into 6FDA-DAM enhanced both the CO 2 permeability and CO 2 /CH 4 selectivity, attributing to the preferential CO 2 sorption and aperture molecular sieving effect of the ZIF-301 filler. The MMM with optimal ZIF-301 loading of 20 wt% exhibited CO 2 permeability of 891 barrer and CO 2 /CH 4 of 29.3 that surpassed the 2008 Robeson upper-bound, suggesting that ZIF-301 based membrane could be a potential candidate for natural gas purification.
研究领域:
材料科学
·
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 46
·28863-28875
·
IF 3.361
Yu Qin,Li Xu,Liying Liu,Xiaoyu Deng,Yucheng Gao,Zhongwei Ding
A novel gas separation approach is proposed in this work by combining an amine-based solid adsorbent with a zeolitic imidazolate framework-8 (ZIF-8) membrane. This was achieved by incorporating the amine-based solid adsorbent during the fabrication of the ZIF-8 membrane on a macroporous substrate. An amine-based solid adsorbent was prepared using porous ZIF-8-3-isocyanatopropyltrimethoxysilane (IPTMS) and N-[(3-trimethoxysilyl)propyl]diethylenetriamine (3N-APS) amine compounds. The as-prepared porous amine-based solid adsorbent (denoted as ZIF-8-IPTMS-3N-APS) possessed excellent adsorptive CO2/N2 and CO2/CH4 separation performances. As the adsorbent needs to be regenerated, this could indicate that the CO2 adsorption separation process cannot be continuously operated. In this work, an amine-based solid adsorbent was applied during the preparation of the ZIF-8 membranes owing to the following reasons: (i) gas separation by the membrane can be operated continuously; (ii) the amino group provides a heterogeneous nucleation site for ZIF-8 to grow; and (iii) the reparation of surface defects on the macroporous substrate can be performed prior to the growth of the ZIF-8 membrane. Herein, the ZIF-8 membrane was successfully fabricated, and it possessed excellent CO2/CH4, CO2/N2, and H2/CH4 separation performances. The 0.6 μm ultrathin ZIF-8 membrane demonstrated a high CO2 permeance of 4.75 × 10−6 mol m−2 s−1 Pa−1 at 35 °C and 0.1 MPa, and ideal CO2/N2 and CO2/CH4 selectivities of 4.67 and 6.02, respectively. Furthermore, at 35 °C and 0.1 MPa, the ideal H2/CH4 selectivity of the ZIF-8 membrane reached 31.2, and a significantly high H2 permeance of 2.45 × 10−5 mol m−2 s−1 Pa−1.
研究领域:
材料科学
·
化学工程
✓ 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）