High performance MoS<sub>2</sub> membranes: effects of thermally driven phase transition on CO<sub>2</sub> separation efficiency

Achari, A.; Sahana, S; Eswaramoorthy, M.

doi:10.1039/c5ee03856a

Cited by 120 publications

(84 citation statements)

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“…Fe‐rGO membranes exhibited improved N 2 permeance and N 2 /CO 2 selectivity at 330 mbar of trans‐membrane pressure (TMP) and room temperature. Moreover, the overall performance of Fe‐rGOM outperforms recent studies (Figure 3A), including GOMs, [ 10,14,24 ] MoS 2 [ 49,50 ] membranes, zeolites, [ 4–6 ] MOFs, [ 8,9,33,51 ] and single‐layer graphene (SLG). [ 52 ] Figure 3B shows the variation of N 2 permeance and N 2 /CO 2 selectivity with Fe atomic percentage in rGO membranes.…”

Section: Figurementioning

confidence: 87%

Effective Separation of CO₂ Using Metal‐Incorporated rGO Membranes

et al. 2020

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Permeance indicates how fast the gas molecule transports through the membrane, usually expressed in gas permeation unit (GPU, 1 GPU = 10 −6 cm 3 (STP) cm −2 scmHg −1 ), while selectivity represents how efficiently the gas is separated from the mixture during the transportation. The nature of molecular transportation in membranes depends on the porosity and type of membrane materials, which can be understood by using mechanisms based on solution-diffusion, size-dependent molecular sieving, Knudsen diffusion, and Poiseuille flow. [3] Materials such as zeolites, [4][5][6] metalorganic frameworks (MOFs), [7][8][9] and carbon-based constituents [10][11][12][13][14] in the form of membranes have been intensively studied as gas barriers in the past. These materials are featured by tuneable nanosized pores, which provide sites for gas

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Section: Figurementioning

confidence: 87%

Effective Separation of CO₂ Using Metal‐Incorporated rGO Membranes

et al. 2020

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“…Beyond that, nanomaterial‐based membranes also show excellent performance in the field of gas separation. Ultrathin membrane technology has proven to be an energy‐efficient, cost‐effective, and environmentally benign approach to gas separation 74–82. Because the membrane pores serve as gas transport channels, decreasing the membrane thickness shortens the permeation path length of gas molecules, and is, therefore, an effective solution to achieve high permeance gas separation.…”

Section: For Gas Separationmentioning

confidence: 99%

“…Laminar ultrathin membranes made of single‐atom‐thick nanosheets, especially GO nanosheets, have been successfully developed and show great potential in the field of gas separation 75–82. Ultrathin GO membranes for H 2 /CO 2 and H 2 /N 2 separation with thickness approaching 1.8 nm have been prepared by Yu's group via a facile filtration process ( Figure a–c).…”

Section: For Gas Separationmentioning

confidence: 99%

“…Control of pore structure and possibly elimination of defects will be required going forward. Very recently, Eswaramoorthy's group prepared high‐permeable MoS 2 membranes with excellent selectivity and high thermal stability 82. In their work, the vacuum filtration of a MoS 2 suspension and subsequent thermally induced phase transition processes are combined to control the gas transport spacing, and an enhanced separation performance is achieved.…”

Section: For Gas Separationmentioning

confidence: 99%

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Ultrathin Membranes: A New Opportunity for Ultrafast and Efficient Separation

Gao

Wang

Fang

et al. 2020

Adv Materials Technologies

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membrane thickness L. However, mass transfer in a nonporous membrane is often described by solution diffusion theory, expressed by the integration of Fick's first law [8] J P p L = ∆ /where the permeation flux J of a dense membrane is directly proportional to the membrane permeability P and the net effective pressure difference (the hydraulic pressure difference minus the osmotic pressure difference) Δp, while inversely proportional to the membrane thickness L. Hence, a feasible concept for obtaining a high permeance membrane is to reduce the membrane thickness. This observation has driven much of the development of ultrathin membranes. An ideal ultrathin membrane or active layer should be as thin as possible to reduce the transfer path length and transfer resistance simultaneously without sacrificing its effective pore size. [9,10] Advanced membranes integrating both ultrathin membranes and large effective pore sizes to achieve ultrahigh permeance, excellent selectivity, and good mechanical stability are highly desired and the subject of extensive research.The rapid development of nanomaterials has provided new avenues toward ultrathin membranes construction. For instance, by using a porous nanostrand membrane as a sacrificial layer, polyamide (PA) membranes as thin as 8.4 nm and diamond-like carbon (DLC) membranes with thickness down to 10 nm were fabricated via interfacial polymerization (IP) reaction and chemical vapor deposition (CVD), respectively. [2,11] Moreover, a series of thin-film composite (TFC) membranes with a PA active layer less than 15 nm were fabricated via IP reaction on porous nanostrands or nanotube support membranes. [12][13][14][15][16][17][18][19] 1D (such as nanotubes, [20][21][22][23][24] nanowires, [25,26] and nanostrands [27][28][29][30] ) and 2D nanomaterials (such as graphene nanosheet derivatives [31][32][33][34][35][36][37][38] and metal sulfide nanosheets [39,40] ) have also been widely adopted to fabricate ultrathin network or laminar membranes with thickness of tens of nanometers via vacuum filtration. The thickness and effective pore size of these nanomaterial-based membranes can be controlled to some extent by tuning the filtrated volume of the nanomaterial dispersion solution.In this progress report, some promising ultrathin membranes are highlighted for liquid filtration or gas separation. In each section, the designs, fabrication techniques, and separation performances of these membranes are introduced. The Developing advanced membranes with both high permeance and selectivity to enable ultrafast and efficient separation is a persistent pursuit by materials scientists. In recent years, diverse ultrathin membranes with nanometer-scale thickness and unique membrane structures have been developed. These materials show ultrahigh permeance and excellent selectivity in water desalination, dye rejection, oil-water purification, and gas separation applications. Herein, current state-of-the-art ultrathin membranes are introduced, including polyamide membranes, diamond-like carbon m...

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“…Although the structure of Hydrocyclone separator is simple, many parameters variable affect the separation efficiency, such as import flow velocity, split ratio, oil droplet size, oil droplet concentration and so on. So many people do the experiments, in order to optimize parameters of the cyclone separator structure and operating conditions [3][4][5]. Because of many relevant variable parameters, there are many problems, such as workloads of experimental research, high cost and uncertainty on industrial amplification [6].…”

Section: Introductionmentioning

confidence: 99%

Oil-water separation efficiency and fluid mechanics of a hydrocyclone

Fan¹

2016

Proceedings of the 2016 7th International Conference on Mechatronics, Control and Materials (ICMCM 2016)

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Abstract. Hydrocyclone separation technology as a kind of effective oil water separation technology, has been applied in the oil industry. The paper proposes numerical simulation of computational fluid dynamics which combine Reynolds stress model and Euler multi-phase model together, and discusses the operating conditions and material properties making influence on the efficiency of oil-water separation of a hydrocyclone by Fluent6.3. The simulation shows that the hydrocyclone with diameter 50mm, two inlets, and a single cone angle 5.5°, has an optimum distribution ratio 10%，a best concentration of oil droplets 0.5%. Under the above conditions, the hydrocyclone could remove more than 80% per 15 m  oil droplets, and the separation of oil droplets cut size is 9.2 m  for 50% separation efficiency. Through simulated prediction of separation efficiency corresponding to the measured values, the error is obtained less than 15%.

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High performance MoS₂ membranes: effects of thermally driven phase transition on CO₂ separation efficiency

Abstract: MoS2 membranes show high performance H2/CO2 separation at high H2 permeability. The MoS2 membranes were found to be thermally stable up to 160 °C and a significant increase in gas permeability was observed due to the thermally driven phase transition from the 1T to the 2H phase.

Cited by 120 publications

References 34 publications

Effective Separation of CO₂ Using Metal‐Incorporated rGO Membranes

Effective Separation of CO₂ Using Metal‐Incorporated rGO Membranes

Ultrathin Membranes: A New Opportunity for Ultrafast and Efficient Separation

Oil-water separation efficiency and fluid mechanics of a hydrocyclone

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High performance MoS2 membranes: effects of thermally driven phase transition on CO2 separation efficiency

Abstract: MoS2 membranes show high performance H2/CO2 separation at high H2 permeability. The MoS2 membranes were found to be thermally stable up to 160 °C and a significant increase in gas permeability was observed due to the thermally driven phase transition from the 1T to the 2H phase.

Cited by 120 publications

References 34 publications

Effective Separation of CO2 Using Metal‐Incorporated rGO Membranes

Effective Separation of CO2 Using Metal‐Incorporated rGO Membranes

Ultrathin Membranes: A New Opportunity for Ultrafast and Efficient Separation

Oil-water separation efficiency and fluid mechanics of a hydrocyclone

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Product

Resources

About

High performance MoS₂ membranes: effects of thermally driven phase transition on CO₂ separation efficiency

Effective Separation of CO₂ Using Metal‐Incorporated rGO Membranes

Effective Separation of CO₂ Using Metal‐Incorporated rGO Membranes