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Micari M, Duan X, Agrawal KV. Atmospheric water harvesting in semi-arid regions by membranes: A techno-economic assessment. J Memb Sci 2023. [DOI: 10.1016/j.memsci.2023.121437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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2
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Zhang Z, Wang Y, Li Z, Fu H, Huang J, Xu Z, Lai Y, Qian X, Zhang S. Sustainable Hierarchical-Pored PAAS-PNIPAAm Hydrogel with Core-Shell Structure Tailored for Highly Efficient Atmospheric Water Harvesting. ACS APPLIED MATERIALS & INTERFACES 2022; 14:55295-55306. [PMID: 36454694 DOI: 10.1021/acsami.2c19840] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
As an effective way to obtain freshwater resources, atmospheric water harvesting (AWH) technology has been a wide concern of researchers. Therefore, hydrogels gradually become key materials for atmospheric water harvesters due to their high specific surface area and three-dimensional porous structure. Here, we construct a core-shell hydrogel-based atmospheric water harvesting material consisting of a shell sodium polyacrylate (PAAS) hydrogel with an open pore structure and a core thermosensitive poly N-isopropylacrylamide (PNIPAAm) hydrogel with a large pore size. Theoretically, the mutual synergistic hygroscopic effect between the core layer and the shell layer accelerates the capture, transport, and storage of moisture to achieve continuous and high-capacity moisture adsorption. Simultaneously, the integration of polydopamine (PDA) with the hydrogel realizes solar-driven photothermal evaporation. Therefore, the prepared core-shell hydrogel material possesses great advantages in water adsorption capacity and water desorption capacity with an adsorption of 2.76 g g-1 (90% RH) and a desorption of 1.42 kg m-2 h-1. Additionally, the core-shell structure hydrogel collects 1.31 g g-1 day-1 of fresh water in outdoor experiments, which verifies that this core-shell hydrogel with integrated photothermal properties can capture moisture in a wide range of humidity without any external energy consumption, can further sustainably obtain fresh water in remote water-shortage areas.
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Affiliation(s)
- Zhibin Zhang
- State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membranes, School of Textile Science and Engineering, Tiangong University, Tianjin300387, P. R. China
| | - Yajun Wang
- Agro-Environment Protection Institute of the Ministry of Agriculture, Tianjin300191, P. R. China
| | - Zheng Li
- State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membranes, School of Textile Science and Engineering, Tiangong University, Tianjin300387, P. R. China
| | - Hiroshi Fu
- State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membranes, School of Textile Science and Engineering, Tiangong University, Tianjin300387, P. R. China
| | - Jianying Huang
- National Engineering Research Center of Chemical Fertilizer Catalyst (NERC-CFC), College of Chemical Engineering, Fuzhou University, Fuzhou350116, P. R. China
| | - Zhiwei Xu
- State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membranes, School of Textile Science and Engineering, Tiangong University, Tianjin300387, P. R. China
| | - Yuekun Lai
- National Engineering Research Center of Chemical Fertilizer Catalyst (NERC-CFC), College of Chemical Engineering, Fuzhou University, Fuzhou350116, P. R. China
| | - Xiaoming Qian
- State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membranes, School of Textile Science and Engineering, Tiangong University, Tianjin300387, P. R. China
| | - Songnan Zhang
- State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membranes, School of Textile Science and Engineering, Tiangong University, Tianjin300387, P. R. China
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Yue D, Zhang H, Liu M, Li B, Ge Y, Sun D, Li F. A novel 5-sulfosalicylic acid - Polyvinyl alcohol - Hydroxyethyl cellulose vapor permeation membrane for gas dehumidification. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.125048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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4
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Constructing rapid water vapor transport channels within mixed matrix membranes based on two-dimensional mesoporous nanosheets. Commun Chem 2022; 5:65. [PMID: 36697670 PMCID: PMC9814085 DOI: 10.1038/s42004-022-00681-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Accepted: 05/04/2022] [Indexed: 01/28/2023] Open
Abstract
Membrane technology is an effective strategy for gas dehumidification and fuel cell humidification. In this study, cerium fluoride oxide (F-Ce) two-dimensional (2D) mesoporous nanosheets and their composite with 1-ethyl-3-methylimidazolium dicyanamide ([Emim][DCA]) ionic liquids (ILs) (IL@F-Ce) are introduced as fillers into polyether block amide (PEBAX® 1074) to fabricate mixed matrix membranes (MMMs). The slit-shaped mesoporous structure of the nanosheets facilitates the construction of water vapor rapid transport channels in MMMs. The permeability and selectivity of water vapor for MMMs loaded with F-Ce nanosheets are greatly improved, and the performance of MMMs loaded with IL@F-Ce nanosheets are much better than the former. Particularly, the MMM with IL@F-Ce content of 4 wt.% achieves the highest H2O permeability of 4.53 × 105 Barrer, which is more than twice that of the pure PEBAX membrane, and the selectivity is increased by 83%. Thus, the MMMs based on 2D mesoporous nanosheets have considerable potential application in industrial-scale dehydration and humidification processes.
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Combined Membrane Dehumidification with Heat Exchangers Optimized Using CFD for High Efficiency HVAC Systems. MEMBRANES 2022; 12:membranes12040348. [PMID: 35448318 PMCID: PMC9029657 DOI: 10.3390/membranes12040348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Revised: 03/08/2022] [Accepted: 03/09/2022] [Indexed: 11/18/2022]
Abstract
Traditional air conditioning systems use a significant amount of energy on dehumidification by condensing water vapor out from the air. Membrane-based air conditioning systems help overcome this problem by avoiding condensation and treating the sensible and latent loads separately, using membranes that allow water vapor transport, but not air (nitrogen and oxygen). In this work, a computational fluid dynamics (CFD) model has been developed to predict the heat and mass transfer and concentration polarization performance of a novel active membrane-based energy exchanger (AMX). The novel design is the first of its kind to integrate both vapor removal via membranes and air cooling into one device. The heat transfer results from the CFD simulations are compared with common empirical correlations for similar geometries. The performance of the AMX is studied over a broad range of operating conditions using the compared CFD model. The results show that strong tradeoffs result in optimal values for the channel length (0.6–0.8 m) and the ratio of coil diameter to channel height (~0.5). Water vapor transport is best if the flow is just past the turbulence transition around 3000–5000 Reynolds number. These trends hold over a range of conditions and dimensions.
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Analysis of the Relative Humidity Response of Hydrophilic Polymers for Optical Fiber Sensing. Polymers (Basel) 2022; 14:polym14030439. [PMID: 35160429 PMCID: PMC8838667 DOI: 10.3390/polym14030439] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2021] [Revised: 01/15/2022] [Accepted: 01/18/2022] [Indexed: 12/07/2022] Open
Abstract
Relative humidity (RH) monitorization is of extreme importance on scientific and industrial applications, and optical fiber sensors (OFS) may provide adequate solutions. Typically, these kinds of sensors depend on the usage of humidity responsive polymers, thus creating the need for the characterization of the optical and expansion properties of these materials. Four different polymers, namely poly(vinyl alcohol), poly(ethylene glycol), Hydromed™ D4 and microbiology agar were characterized and tested using two types of optical sensors. First, optical fiber Fabry–Perot (FP) tips were made, which allow the dynamical measurement of the polymers’ response to RH variations, in particular of refractive index, film thickness, and critical deliquescence RH. Using both FP tips and Long-Period fiber gratings, the polymers were then tested as RH sensors, allowing a comparison between the different polymers and the different OFS. For the case of the FP sensors, the PEG tips displayed excellent sensitivity above 80%RH, outperforming the other polymers. In the case of LPFGs, the 10% (wt/wt) PVA one displayed excellent sensitivity in a larger working range (60 to 100%RH), showing a valid alternative to lower RH environment sensing.
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Membrane-based air dehumidification: A comparative review on membrane contactors, separative membranes and adsorptive membranes. Chin J Chem Eng 2022. [DOI: 10.1016/j.cjche.2021.12.018] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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Comparison of Water-Removal Efficiency of Molecular Sieves Vibrating by Rotary Shaking and Electromagnetic Stirring from Feedstock Oil for Biofuel Production. FERMENTATION-BASEL 2021. [DOI: 10.3390/fermentation7030132] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Adequate water-removal techniques are requisite to remain superior biofuel quality. The effects of vibrating types and operating time on the water-removal efficiency of molecular sieves were experimentally studied. Molecular sieves of 3 Å pore size own excellent hydrophilic characteristics and hardly absorb molecules other than water. Molecular sieves of 3 Å accompanied by two different vibrating types, rotary shaking and electromagnetic stirring, were used to remove initial water from the reactant mixture of feedstock oil in order to prevent excessive growth or breeding of microorganisms in the biofuel product. The physical structure of about 66% molecular sieves was significantly damaged due to shattered collision between the magnetic bar and molecular sieves during electromagnetic stirring for 1 h. The molecular sieves vibrated by the rotary shaker appeared to have relatively higher water-removal efficiency than those by the electromagnetic stirrer and by keeping the reactant mixture motionless by 6 and 5 wt.%, respectively. The structure of the molecular sieves vibrated by an electromagnetic stirrer and thereafter being dehydrated appeared much more irregular and damaged, and the weight loss accounted for as high as 19 wt.%. In contrast, the structure of the molecular sieves vibrated by a rotary shaker almost remained original ball-shaped, and the weight loss was much less after regenerative treatment for those molecular sieves. As a consequence, the water-removal process using molecular sieves vibrated by the rotary shaker is considered a competitive method during the biofuel production reaction to achieve a superior quality of biofuels.
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9
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Heat and mass transfer modeling of an energy efficient Hybrid Membrane-Based Air Conditioning System for humid climates. J Memb Sci 2021. [DOI: 10.1016/j.memsci.2021.119179] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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10
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Park S, Jeong HK. Enhancing air-dehumidification performance of polyimide membranes by generating hydrophilic Poly(amic acid) domains using partial hydrolysis. J Memb Sci 2021. [DOI: 10.1016/j.memsci.2020.119006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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11
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Chun L, Gong G, Fang X, Peng P, Li W. Investigation of dehumidification performance and flow characteristics of wavy vacuum membrane-based dehumidification modules. Chem Eng Res Des 2021. [DOI: 10.1016/j.cherd.2021.01.021] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Xu K, Ye H. Theoretical and Experimental Investigation on the Moisture Sorption Kinetics of a PVA/LiCl Composite Membrane in a Dynamic Humidity Environment. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:14453-14460. [PMID: 33198471 DOI: 10.1021/acs.langmuir.0c02938] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The PVA/LiCl composite membrane is an important material with a selective permeation to moisture. In this study, the sorption kinetics characteristics of the PVA/LiCl composite membrane are investigated in a dynamic humidity environment. The sorption kinetics curves of the PVA/LiCl composite membranes with different LiCl contents were measured in the range from 10 to 90% relative humidity, and the kinetics characteristics of the sorption components of the total moisture uptake were analyzed with a triple-mode sorption model. The results show that the process of pooling adsorption occurs only when the amount of Henry absorption exceeds a threshold. With the increase in LiCl content, the threshold gradually decreases, indicating that introducing LiCl in the membrane mainly affects the process of pooling adsorption. In the desorption part of the kinetics curve, the amounts of Henry absorption and pooling adsorption gradually decrease, while the moisture adsorbed by the hydrophilic hydroxyls, i.e., the amount of Langmuir adsorption, is still largely retained in the membrane, resulting in the water-retaining performance in a low-humidity environment. It is noteworthy that in a high-humidity environment, the amounts of Henry absorption and Langmuir adsorption are almost evenly distributed in the film, while the amount of pooling adsorption near the surface is significantly higher than that at the center. The reason is that with the increase in humidity, the rate of pooling adsorption near the surface increases significantly, resulting in the majority of the moisture diffusing into the dense membrane clusters near the surface. The established theoretical method and model parameters can be adopted to predict the moisture sorption and desorption processes of the PVA/LiCl composite membrane in a dynamic humidity environment.
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Affiliation(s)
- Kai Xu
- Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei 230027, People's Republic of China
| | - Hong Ye
- Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei 230027, People's Republic of China
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Deimede V, Vroulias D, Kallitsis J, Ioannides T. Pyridinium based Poly(Ionic Liquids) membranes with exceptional high water vapor permeability and selectivity. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2020.117412] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Liu Y, Cui X, Yan W, Su J, Duan F, Jin L. Analysis of pressure-driven water vapor separation in hollow fiber composite membrane for air dehumidification. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2020.117334] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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15
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Akhtar FH, Vovushua H, Villalobos LF, Shevate R, Kumar M, Nunes SP, Schwingenschlögl U, Peinemann KV. Highways for water molecules: Interplay between nanostructure and water vapor transport in block copolymer membranes. J Memb Sci 2019. [DOI: 10.1016/j.memsci.2018.11.050] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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16
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Meireles IT, Fraga SC, Huertas RM, Brazinha C, Coelhoso IM, Crespo JG. Evaluation of hybrid polysaccharide membranes for gas dehydration using on-line mass spectrometry. J Memb Sci 2018. [DOI: 10.1016/j.memsci.2018.05.030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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17
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Yong WF, Ho YX, Chung TS. Nanoparticles Embedded in Amphiphilic Membranes for Carbon Dioxide Separation and Dehumidification. CHEMSUSCHEM 2017; 10:4046-4055. [PMID: 28834318 DOI: 10.1002/cssc.201701405] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Indexed: 06/07/2023]
Abstract
Polymers containing ethylene oxide (EO) groups have gained significant interest as the EO groups have favorable interactions with polar molecules such as H2 O, quadrupolar molecules such as CO2 , and metal ions. However, the main challenges of poly(ethylene oxide) (PEO) membranes are their weak mechanical properties and high crystallinity nature. The amphiphilic copolymer made from PEO terephthalate and poly(butylene terephthalate) (PEOT/PBT) comprises both hydrophilic and hydrophobic segments. The hydrophilic PEOT segment is thermosensitive, which facilities gas transports whereas the hydrophobic PBT segment is rigid, which provides mechanical robustness. This work demonstrates a new strategy to design amphiphilic mixed matrix membranes (MMMs) by incorporating zeolitic imidazolate framework, ZIF-71, into the PEOT/PBT copolymer. The resultant membrane shows an enhanced CO2 permeability with an ideal CO2 /N2 selectivity surpassing the original PEOT/PBT and Robeson's Upper bound line. The nanoparticles-embedded amphiphilic membranes exhibit characteristics of high transparency and mechanical robustness. Mechanically strong composite hollow fiber membranes consisting of PEOT/PBT/ZIF-71 as the selective layer were also prepared. The resultant hollow fibers possess an excellent CO2 permeance of 131 GPU (gas permeation units), CO2 /N2 selectivity of 52.6, H2 O permeance of 9300 GPU and H2 O/N2 selectivity of 3700, showing great potential for industrial CO2 capture and dehumidification.
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Affiliation(s)
- Wai Fen Yong
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, 117585, Singapore, Singapore
| | - Yan Xun Ho
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, 117585, Singapore, Singapore
| | - Tai-Shung Chung
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, 117585, Singapore, Singapore
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Bui T, Wong Y, Islam M, Chua K. On the theoretical and experimental energy efficiency analyses of a vacuum-based dehumidification membrane. J Memb Sci 2017. [DOI: 10.1016/j.memsci.2017.05.067] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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19
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Akhtar FH, Kumar M, Peinemann KV. Pebax®1657/Graphene oxide composite membranes for improved water vapor separation. J Memb Sci 2017. [DOI: 10.1016/j.memsci.2016.10.045] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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20
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Bui T, Wong Y, Thu K, Oh S, Kum Ja M, Ng K, Raisul I, Chua K. Effect of hygroscopic materials on water vapor permeation and dehumidification performance of poly(vinyl alcohol) membranes. J Appl Polym Sci 2017. [DOI: 10.1002/app.44765] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- T.D. Bui
- Department of Mechanical Engineering; National University of Singapore; 9 Engineering Drive 1 Singapore 117576 Singapore
| | - Y. Wong
- Department of Mechanical Engineering; National University of Singapore; 9 Engineering Drive 1 Singapore 117576 Singapore
| | - K. Thu
- Kyushu University Program for Leading Graduate School, Green Asia Education Center Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga-koen 6-1, Kasuga-shi; Fukuoka 816-8580 Japan
| | - S.J. Oh
- Department of Mechanical Engineering; National University of Singapore; 9 Engineering Drive 1 Singapore 117576 Singapore
| | - M. Kum Ja
- Department of Mechanical Engineering; National University of Singapore; 9 Engineering Drive 1 Singapore 117576 Singapore
| | - K.C. Ng
- Water Desalination & Reuse Centre, King Abdullah University of Science & Technology; Thuwal Saudi Arabia
| | - I. Raisul
- Engineering Science Programme, National University of Singapore, 5 Engineering Drive 2, Block E2-05-08; Singapore 117579 Singapore
| | - K.J. Chua
- Department of Mechanical Engineering; National University of Singapore; 9 Engineering Drive 1 Singapore 117576 Singapore
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Baig MI, Ingole PG, Choi WK, Park SR, Kang EC, Lee HK. Development of carboxylated TiO2 incorporated thin film nanocomposite hollow fiber membranes for flue gas dehydration. J Memb Sci 2016. [DOI: 10.1016/j.memsci.2016.05.017] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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