Enhanced CO2/N2 separation by porous reduced graphene oxide/Pebax mixed matrix membranes

Dong, Guanying; Hou, Jingwei; Wang, Jing; Zhang, Yatao; Chen, Vicki; Liu, Jindun

doi:10.1016/j.memsci.2016.08.059

Cited by 198 publications

(104 citation statements)

References 63 publications

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“…In addition, GO exhibits high thermal and mechanical stability and it is highly tunable and processable in solution . Many research studies have proved that GO can enhance CO 2 capture and separation . Li et al reported that due to the high aspect ratio (>1000) of GO, it led to an increasingly tortuous path of gas diffusion in the polymer matrix and reduced the mobility of polymer chains .…”

Section: Introductionmentioning

confidence: 99%

Composite membranes of graphene oxide for CO₂/CH₄ separation

Norahim

Faungnawakij

Quitain

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND Biogas is an alternative renewable energy produced by anaerobic digestion of various organic wastes mainly from agriculture, households and biomass and food industries. Typically, raw biogas consists of 50–70% methane (CH4), 30–50% carbon dioxide (CO2), and small amounts of hydrogen sulfide (H2S) and water vapour. Purifying biogas by removing CO2 and other trace impurities is required in order to achieve higher calorific value, safe operation and to meet fuel standards. As CO2 is the second largest component of biogas, this study focused on its removal from CH4. RESULTS Composite membranes of blended PEG 400/Pebax 1657 polymer and graphene oxide (GO) were developed for CO2/CH4 gas separation. The effects of GO loading and PEG 400 addition on CO2/CH4 separation performance were investigated. Optimal loadings of 0.25 wt% GO and 50 wt% PEG 400 obtained the best membrane performance with 12.4 GPU of CO2 permeance and 14 of CO2/CH4 separation factor. CONCLUSION Incorporating GO to the polymer membrane enhanced CO2/CH4 separation, whereas PEG 400 addition increased CO2 permeance. The advantages from each component led to an enhancement of CO2 permeance and CO2/CH4 separation. © 2019 Society of Chemical Industry

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Section: Introductionmentioning

confidence: 99%

Composite membranes of graphene oxide for CO₂/CH₄ separation

Norahim

Faungnawakij

Quitain

et al. 2019

J of Chemical Tech & Biotech

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“…Meanwhile Lin et al 137 explored that the porous r-GO membrane can only allow the transmission of CO 2 , whilst resisting CH 4 . Later, Dong et al 94 synthesized r-GO/Pebax MMMs for the separation of CO 2 /N 2 , and they utilized the narrow gas ow channels ($0.34 nm) of the prepared membrane to enhance the selectivity that is 104. Recently, various attempts have been made by the researchers to modify pure GO or r-GO membrane for gas separation.…”

mentioning

confidence: 99%

Separation and purification using GO and r-GO membranes

et al. 2018

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Many materials with varied characteristics have been used for water purification and separation applications. Recently discovered graphene oxide (GO), a two-dimensional derivative of graphene has been considered as a promising membrane material for water purification due to its excellent hydrophilicity, high water permeability, and excellent ionic/molecular separation properties. This review is focussed on the possible versatile applicability of GO membranes. It is also known that selective reduction of GO results in membranes with a pore size of $0.35 nm, ideally suited for desalination applications. This article presents the applicability of graphene-based membranes for multiple separation applications. This is indeed the first review article outlining a comparison of GO and r-GO membranes and discussing the suitability for applications based on the porosity of the membranes.

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“…Consequently, because of CO 2 ’s upper critical temperature and affinity to the membrane matrix, it has the highest permeability of these gases, whereas N 2 has the least permeability because of its smaller kinetic diameter, lower critical temperature, and lower condensability compared to CH 4 …”

Section: Resultsmentioning

confidence: 99%

“…The effects of Fe 2 O 3 content on PEBA/Fe 2 O 3 magnetic MMMs and the effects of feed pressure on gas permeability are depicted in Fig. …”

Section: Resultsmentioning

confidence: 99%

Magnetic nanoFe₂O₃ – incorporated PEBA membranes for CO₂/CH₄ and CO₂/N₂ separation: experimental study and grand canonical Monte Carlo and molecular dynamics simulations

2019

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Mixed matrix membranes (MMMs) comprised of organic selective polymers and inorganic nano‐particles under the name of fillers have attracted much attention in the field of gas separation. In this study, poly (amide‐6‐b‐ethylene oxide) [PEBA]/Fe2O3 mixed matrix membranes were prepared using the dry phase separation technique with ethanol / water (70/30 wt%) as solvent. Various amount of Fe2O3 nanoparticles were chosen to disperse within the polymer matrix (0, 0.5, 1, 1.5 and 2 wt% of polymer). To prepare this type of novel membrane, a magnetic field of 0.3 T was used to align the position of NPs. The structural properties and surface morphology of prepared membranes were characterized by field emission scanning electron microscopy (FESEM) and atomic force microscopy (AFM). Field emission scanning electron microscopy analysis was also used to study the physical bonding. Phase identification and crystallinity, effective area, and distribution of pore size were investigated by X‐ray diffraction (XRD) and Brunauer–Emmett–Teller (BET) analysis. Carbon dioxide permeability through these membranes increased with pressure in the range of 2 to 14 bar. Magnetic membrane loaded with 1.5 wt% of Fe2O3 gave the best performance: CO2 permeability, CO2/CH4, and CO2/N2 selectivity were enhanced by 30, 42 and 81%, compared to a pure membrane, respectively. The results indicated that the magnetic MMMs gave better separation performance than pure membranes. Molecular simulation has also been used to investigate the structural and transport properties of fabricated membranes. Structural characterizations like radial distribution function (RDF), fractional free volume (FFV), and X‐ray diffraction were applied to the simulated membrane cells. Grand canonical Monte Carlo (GCMC) and molecular dynamic (MD) simulations, were used to calculate the selectivity and diffusivity of membranes. Results from experimental tests and simulation runs revealed that the selectivity and permeability of fabricated and simulated membranes are consistent. © 2019 Society of Chemical Industry and John Wiley & Sons, Ltd.

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Enhanced CO2/N2 separation by porous reduced graphene oxide/Pebax mixed matrix membranes

Cited by 198 publications

References 63 publications

Composite membranes of graphene oxide for CO₂/CH₄ separation

Composite membranes of graphene oxide for CO₂/CH₄ separation

Separation and purification using GO and r-GO membranes

Magnetic nanoFe₂O₃ – incorporated PEBA membranes for CO₂/CH₄ and CO₂/N₂ separation: experimental study and grand canonical Monte Carlo and molecular dynamics simulations

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Enhanced CO2/N2 separation by porous reduced graphene oxide/Pebax mixed matrix membranes

Cited by 198 publications

References 63 publications

Composite membranes of graphene oxide for CO2/CH4 separation

Composite membranes of graphene oxide for CO2/CH4 separation

Separation and purification using GO and r-GO membranes

Magnetic nanoFe2O3 – incorporated PEBA membranes for CO2/CH4 and CO2/N2 separation: experimental study and grand canonical Monte Carlo and molecular dynamics simulations

Contact Info

Product

Resources

About

Composite membranes of graphene oxide for CO₂/CH₄ separation

Composite membranes of graphene oxide for CO₂/CH₄ separation

Magnetic nanoFe₂O₃ – incorporated PEBA membranes for CO₂/CH₄ and CO₂/N₂ separation: experimental study and grand canonical Monte Carlo and molecular dynamics simulations