SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Huapu Zhao,Yaru Kong,Man Xu,Cunwen Wang,Yuan Liu,Yanbo Li
Pervaporation (PV) membranes for desalination show significant potential, attracting increasing attention. Herein, polyphenol (tannic acid) was used to crosslink chitosan to prepare composite membranes for pervaporation desalination. The effects of the coating method, the concentrations of chitosan (CS) and tannic acid (TA), the deposition time of CS and TA, and the thermal annealing time on the desalination performance of the pervaporation membranes were investigated to explore the relationship between membrane structure and pervaporation desalination performance. After optimizing the synthesis conditions, a high flux pervaporation desalination membrane (44 kg·m −2 ·h −1 at 50°C and 92 kg·m −2 ·h -1 at 70°C) with a NaCl rejection higher than 99.9 % was prepared by co-depositing chitosan and TA on a polysulfone support. This work demonstrates TA crosslinked CS composite membranes have promising research prospects and potential applications in pervaporation desalination.
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
JOURNAL OF MEMBRANE SCIENCE
·
2018
·
IF 6.578
Heng Mao,Hong-Gang Zhen,Ali Ahmad,Ao-Shuai Zhang,Zhi-Ping Zhao
Biofuels separation using membranes becomes one of the research focuses in the field of renewable energy. In this study, a series of mixed matrix membranes (MMMs) with defect-free active layer around 1 µm thickness were elaborately prepared through interfacial synthesis for ethanol permselective pervaporation . Polydimethylsiloxane (PDMS) was employed as polymer matrix , which adjusted the nucleation of MOF precursors to in situ generate ZIF-8 nanoparticles . Within the active layer, the resultant ZIF-8 nanoparticles provided the preferential pathways for ethanol due to their ultrahigh adsorption capacity and super-hydrophobicity. Moderate aggregation could form the relatively continuous diffusion pathways. This approach rendered the uniform dispersion of ZIF-8 nanoparticles within PDMS matrix and their excellent compatibility. The ZIF-8 nanoparticles endowed the membranes with enhanced ethanol affinity, hydrophobic property, and thermal stability. More importantly, the ZIF-8 nanoparticles substantially reduced the permeation energy barriers of the membrane for penetrants. The membranes displayed the simultaneous increase in permeation flux and separation factor when utilized for ethanol recovery from aqueous solution, revealing the desirable anti-tradeoff effect. Particularly, the resultant membrane exhibited a superior pervaporation performance with relatively high permeation flux (1778 g · m -2 · h -1 ) and comparable separation factor (12.1) in separating 5.0 wt% ethanol aqueous solution at 40 °C.
研究领域:
可再生能源
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材料科学
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化学工程
✓ 已验证
DOI
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 18
·4465
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IF 4.2
Yun Xiong,Yifan Shu,Niyan Deng,Xiaogang Luo,Shengpeng Liu,Xiaoyu Wu
This study investigated the enhancement in bioethanol recovery from mixed matrix membranes (MMMs) by functionalizing zeolite framework-8 (ZIF-8) with imidazolate. This study focused on the separation of ethanol from low-concentration ethanol/water mixtures (typical post-fermentation concentrations of 5–10 wt%). Specifically, ZIF-8 was modified by the shell–ligand exchange reaction (SLER) with 5,6-dimethylbenzimidazole (DMBIM), resulting in ZIF-8-DMBIM particles with improved hydrophobicity, organophilicity, larger size, and adjustable pore size. These particles were incorporated into a PEBAX 2533 matrix to produce ZIF-8-DMBIM/PEBAX MMMs using a dilution blending method. The resulting membranes showed significant performance enhancement: 8 wt% ZIF-8-DMBIM loading achieved a total flux of 308 g/m2·h and a separation factor of 16.03, which was a 36.8% increase in flux and 176.4% increase in separation factor compared with the original PEBAX membrane. In addition, performance remained stable during a 130 h cycling test. These improvements are attributed to the enhanced compatibility and dispersion of ZIF-8-DMBIM in the PEBAX matrix. In conclusion, the evaluation of nanofiller content, feed concentration, operating temperature, and membrane stability confirmed that ZIF-8-DMBIM/PEBAX MMM is ideal for ethanol recovery in primary bioethanol concentration processes.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Foods
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2022
·Vol. 11
·期 17
·2598
·
IF 5.561
Xiaoqin Wang,Wentao Guo,Baoguo Sun,Hehe Li,Fuping Zheng,Jinchen Li,Nan Meng
As a deep-processed product of peach, the aroma characteristics of peach spirit have not been systematically studied, and there has been no research on improving the aroma quality through process improvement. Pervaporation technology was used for the first time in the production of peach spirit instead of distillation, and its critical aroma compounds were analyzed compared with distilled peach spirit. Compared to the distilled peach spirit, pervaporation produced peach spirit presented stronger fruity, honey, and acidic aromas, and lighter cooked-apple aroma. Sixty-two and 65 aroma-active regions were identified in the distilled and pervaporation produced peach spirits, and 40 and 43 of them were quantified. The concentrations of esters, lactones, and acids were significantly higher in the pervaporation produced peach spirit than those in the distilled peach spirit, while terpenoids showed opposite tendency. Both of the overall aromas of distilled and pervaporation produced peach spirits were reconstituted successfully by the compounds with OAV ≥ 1. The omission tests identified 10 and 18 compounds as important aroma compounds for distilled and pervaporation-produced peach spirits, respectively. The differences in the key aroma compounds between the two types of peach spirits explained the differences in the aroma profiles.Keywords:peach spirit;distillation;pervaporation;aroma;sensomics approach
研究领域:
食品科学
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芳香学
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蒸馏技术
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感官分析
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2019
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IF 7.015
Yi Wu,Li Ding,Zong Lu,Junjie Deng,Yanying Wei
Two-dimensional MXene membranes have been successfully used in separation technology. With controllable interlayer nanochannels, abundant surface-terminating groups and hydrophilicity, MXene membranes also exhibit the potential in alcohol dehydration. Here, 2-μm-thick MXene membranes stacked by Ti 3 C 2 T x nanosheets were fabricated and applied in ethanol dehydration for the first time. Effects of the feed ethanol concentration and operating temperature on the ethanol dehydration performance of the MXene membrane were investigated through a pervaporation process. The water/ethanol separation factor of the MXene membrane increased with increasing feed ethanol concentration. Additionally, the MXene membrane exhibited better ethanol dehydration performance at room temperature compared with that at elevated temperature. It gave a water/ethanol separation factor of 135.2 with a total flux of 263.4 g m −2 h −1 at room temperature for the azeotrope dehydration (95% ethanol mixed with 5% water). MXene membranes are promising in applications of pervaporation dehydration and solvent separation.
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
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2023
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IF 4.2
Jiawen Fu,Chenxi Dong,Miaoli Hao,Xinping He,Dongyun Wu,Chunhai Yi,Suitao Qi
In this study, a highly hydrophilic membrane was developed by an interfacial reaction using two aqueous monomers for pervaporation (PV) desalination. Two water-soluble monomers, procyanidin (PC) and vinyl alcohol-vinylamine copolymer (VA-co-VAm), were applied to prepare membranes on hydrophobic polyvinylidene difluoride (PVDF) membranes through interfacial reactions. Catechol groups of PC were oxidized to quinone groups under weakly alkaline conditions, which could react with amino groups of VA-co-VAm to form a cross-linked network. The PVDF membrane was first dipped into a PC aqueous solution to form a thin PC liquid layer on the surface. Accompanied by the PC liquid layer, the PVDF membrane was then dipped into the VA-co-VAm solution to induce the interfacial reaction. The composition and structure of membranes were observed, and the effects of different factors on the desalination performance were investigated. By applying two aqueous monomers in the interfacial reaction process, the obtained thin membrane showed good hydrophilicity with a water contact angle of less than 42°. A water flux of 42.16 kg/(m2·h) at 60 °C was obtained by treating a feed solution (3.5 wt % NaCl). At all testing procedures, the salt rejection remained higher than 99.99%. Besides, the membrane displayed superior stability over 48 h of testing. According to the above results, the prepared membranes showed great potential in the process of PV desalination. This work provides a new approach for highly permeable PV membrane preparation through an interfacial reaction using two water-soluble materials.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
Frontiers of Chemical Science and Engineering
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2019
·Vol. 14
·期 4
·661-672
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IF 2.809
Zhang Ye,Song Jian,Mayta Josue Quispe,Pan Fusheng,Gao Xue,Li Mei,Song Yimeng,Wang Meidi,Cao Xingzhong,Jiang Zhongyi
The utilization of materials with a hierarchical porous structure as multi-functional additives is highly attractive in the preparation of hybrid membranes. In this study, novel hybrid membranes are designed by embedding hierarchical porous Santa Barbara Amorphous 15 (SBA-15) with a dual-pore architecture (micropores and mesopores) for pervaporation desulfurization. The SBA-15 with cylindrical mesopores provides molecular transport expressways to ensure improved permeability, while micropores on the wall have molecular sieving effects that are essential for the enhancement of permselectivity of thiophene molecules. Considering thiophene/ n -octane mixture as a model system, the hybrid membrane with embedded 6 wt-% SBA-15 exhibits optimal pervaporation desulfurization performance with a permeation flux of 22.07 kg·m −2 ·h −1 and an enrichment factor of 6.76. Moreover, the detailed structure and properties of hybrid membranes are systematically characterized. This study demonstrates the immense potential of hierarchical porous materials as additives in membranes to simultaneously increase permeability and permselectivity.
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 Membrane Science Letters
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2022
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IF 0
Yunfei Xing,Yunlong Xue,Dujian Qin,Pengbo Zhao,Pei Li
Although pervaporation (PV) membranes based on crosslinked polyvinyl alcohol (PVA) exhibit high desalination performance, the thermal crosslinking process often takes several hours. Here, we report a microwave assisted method to reduce the crosslinking duration. Moreover, to the PVA crosslinking system, a MOF particle, UIO-66, was added to increase the microwave absorbing efficiency and improve the desalination property. As a result, the PVA crosslinking time decreased to 2 min and the water flux increased by 67% compared with the plain crosslinked PVA membrane.
研究领域:
材料科学
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环境工程
✓ 已验证
DOI
Advanced Membranes
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2023
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IF 0
Zhihu Zhao,Guoke Zhao,Gongqing Tang,Yiqun Liu,Pei Li
In this study, a multi-layer pervaporation composite membrane was prepared by spray-coating a hydrophilic layer consisting of poly(allylamine hydrochloride) (PAH)/polyvinyl alcohol (PVA)/trimesic acid (BTA) onto a polyethersulfone (PES) porous substrate. The presence of amine groups facilitated the transport of water molecules, enabling the composite membrane to exhibit excellent water/ethanol separation properties. When a feed solution consisting of 90 wt% ethanol and 10 wt% water was dehydrated using the PV membrane at 70 °C, a flux of 1.46 kg m −2 h −1 with a water/ethanol separation factor of 3300 was realized. In addition, after coating a 267 nm silicone rubber layer on top of the membrane, the separation factor was further increased by 70.79 % to 5285, while the flux was slightly decreased by 12.33 % to 1.28 kg m −2 h −1 . This was because the hydrophobic silicone rubber layer reduced the water swelling effect of the selective layer and hindered the permeation of ethanol-water coupling molecules, resulting in a reduction in the ethanol flux of the composite membrane and an improvement in the separation factor. This simple but effective method to improve dehydration properties was very useful for fabricating PV composite membranes.
研究领域:
材料科学
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化学工程
·
膜技术
✓ 已验证
DOI
DESALINATION
·
2022
·
IF 11.211
Jiawei Sun,Wei Jia,Jiaxin Guo,Noman Khalid Khanzada,Pengrui Jin,Pak Wai Wong,Xinning Zhang,Alicia Kyoungjin An
This study provides an in-depth investigation on the incorporation of carbon quantum dots (CQDs) in fabricating novel thin-film nanocomposite (TFN) membranes to address the high demand for highly water-permeable pervaporation (PV) membranes for desalination processes, especially for treating high-salinity water, brine, or wastewater. CQDs have emerged as a green nanofiller for improving membrane performance owing to its excellent biocompatibility, non-toxicity, uniform dispersion, and rich functional groups. Herein, we synthesize amino-embedded carbon quantum dots (ACQDs) via a simple one-pot hydrothermal method and employ them in interfacial polymerization to fabricate the ACQD-TFN membrane. Benefiting from the incorporation of ACQDs, the optimized ACQD-TFN membrane exhibited an enhanced water flux of 23.2 kg·m −2 ·h −1 at 70 °C during the treatment of a 10 wt% NaCl solution, which was 44% higher performance than that of the unmodified thin-film composite membrane . The ACQD-TFN membrane's salt rejection remained at 99.9% even after 96,000 ppm·h chlorine exposure, exhibiting excellent chlorine resistance. Also, the ACQD-TFN membrane's regular surface microstructure and increased hydrophilicity endowed good anti-fouling property, and its flux recovery rate reached 91% after 5 fouling-cleaning cycles. This work provides a feasible strategy for fabricating highly permeable, chlorine-resistant, and anti-fouling PV membranes for desalination applications.
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
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
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2019
·
IF 6.97
Ebrahim Ataeivarjovi,Zhigang Tang,Jian Chen,Zhijun Zhao,Guo Dong
Currently, there is strong interest in carbon capture and absorption as a means of reducing carbon dioxide emissions and combating climate change. Unfortunately, the current and traditional methods to achieve such goals are not economical, because they require a huge absorption–desorption plant with high investment and operating costs and high recycle rates of chemical absorbers. In this paper, we propose a novel CO2 capture method combining dimethyl carbonate as a physical solvent and polydimethylsiloxane (PDMS)/TiO2 nanocomposite as a desorption membrane. The effects of TiO2 concentration, feed temperature, and permeate pressure on the pervaporation process for CO2 capture were studied. Results showed that the addition of TiO2 nanoparticles (up to 5 wt %) resulted in 3.61 kg/m2·h flux and 44.68 selectivity of the membrane. The presence of TiO2 nanoparticles in the PDMS membrane not only increased the performance of membrane’s but also reduced (about 72%) energy consumption. To corroborate our experimental findings, a simple simulation was conducted by Gaussian 09. The modeling results demonstrated that the incorporation of TiO2 nanoparticles to the PDMS led to favorable absorption of CO2 compared with the composite one. These results indicate a novel and promising method to capture CO2 effectively and economically for industrial purposes.
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
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Pengbo Zhao,Bowen Yao,Junquan Meng,Rui Zhang,Bing Cao,Pei Li
Pervaporation (PV), as a cost-efficient concentrating process, has been studied for Zero Liquid Discharge (ZLD) of desalination. Although high water flux and excellent salt rejection have been reported for many PV membranes. The desalination performance, fouling behavior, and cleaning protocol for treating real reverse osmosis concentrate (ROC) generated from industrial plants have never been studied. Meanwhile, understanding the fouling behavior and cleaning method in the treating process is crucial for the development of suitable PV desalination membranes. In this study, we used a lab-made PV membrane to treat industrial ROC with a high chemical oxygen demand (COD) value and high salt concentrations. The results showed that conductivity and COD of the produced water were below 20 μs/cm and 70 mg/L, respectively, which fulfilled the discharge standard. However, the membrane fouling problem was not trivial. To address the fouling issue, a chemical softening method was adopted to remove the calcium salts of the ROC, and a membrane cleaning method was developed to regenerate the water flux. As a result, a long-term water flux of 31.27 kg/m 2 ·h with a flux recovery rate of 98% were realized. This highlights the potential of PV desalination technology for ROC reclamation.
研究领域:
环境科学
·
材料科学
·
水处理工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）