Kinetic Modeling of Pure and Multicomponent Gas Permeation Through Microporous Membranes: Diffusion Mechanisms and Influence of Isotherm Type

Lito, Patrícia F.; Cardoso, Simão P.; Rodrigues, Alı́rio E.; Silva, Carlos M.

doi:10.1080/15422119.2014.908918

Cited by 22 publications

(13 citation statements)

References 136 publications

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“…The diffusion coefficient is recognized as a critical parameter for evaluating the methane diffusion properties in coal matrices (Charri ere et al, 2010;Jin et al, 2015;Lito et al, 2015;Lu et al, 2015a;Walker and Mahajan, 1978;Xu et al, 2015). In our research, the diffusion coefficient of pulverized coal was also compared with that of unpulverized coal.…”

Section: Experimental Comparative Analysismentioning

confidence: 97%

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Pulverization characteristics of coal from a strong outburst-prone coal seam and their impact on gas desorption and diffusion properties

Guo

Wang

Ren

et al. 2016

Journal of Natural Gas Science and Engineering

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Section: Experimental Comparative Analysismentioning

confidence: 97%

“…Gas diffusion in a coal mass is a very complex process, and it is thought that the process can be described by Fick's diffusion law (Charri ere et al, 2010;Clarkson and Bustin, 1999;Lito et al, 2015;Pillalamarry et al, 2011):…”

Section: Diffusion Coefficientsmentioning

confidence: 99%

Pulverization characteristics of coal from a strong outburst-prone coal seam and their impact on gas desorption and diffusion properties

Guo

Wang

Ren

et al. 2016

Journal of Natural Gas Science and Engineering

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“…There are two transport nanochannels in the MXene lamellar membrane, which are straight nanochannels from inner-sheet structural defects and tortuous nanochannels in wrinkles and inter-galleries contained interlayer spacing between stacked MXene sheets. Additionally, the gases transport mechanisms for the diffusion in porous membrane are primarily dependent on the transport channel width, geometry, and interconnectivity [2,25,28]. Therefore, it is extremely critical to figure out the dimension of the nanochannels before we perform the modeling.…”

Section: The Experimental Nitrogen Permeance and The Parameters Regrementioning

confidence: 99%

“…Therefore, in order to optimize and promote the performance and the efficiency of the 2D MXene lamellar membranes, the gas transport mechanisms are still needed to be further clarified because they can efficiently provide the guidance for tuning the channel width of 2D lamellar membranes and gas molecule-channel wall interactions in gas transportation. That is due to the gas transportation mechanism in porous media is primarily related with pore diameter, pore geometry, and interconnectivity of the interlayer distance and defects in the 2D lamellar membranes structure [25].…”

Section: Introductionmentioning

confidence: 99%

Theoretical and Experimental Insights into the Mechanism for Gas Separation through Nanochannels in 2D Laminar MXene Membranes

et al. 2019

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Clarifying the mechanism for the gas transportation in the emerging 2D materials-based membranes plays an important role on the design and performance optimization. In this work, the corresponding studies were conducted experimentally and theoretically. To this end, we measured the gas permeances of hydrogen and nitrogen from their mixture through the supported MXene lamellar membrane. Knudsen diffusion and molecular sieving through straight and tortuous nanochannels were proposed to elucidate the gas transport mechanism. The average pore diameter of 5.05 Å in straight nanochannels was calculated by linear regression in the Knudsen diffusion model. The activation energy for H2 transport in molecular sieving model was calculated to be 20.54 kJ mol−1. From the model, we can predict that the gas permeance of hydrogen (with smaller kinetic diameter) is contributed from both Knudsen diffusion and molecular sieving mechanism, but the permeance of larger molecular gases like nitrogen is sourced from Knudsen diffusion. The effects of the critical conditions such as temperature, the diffusion pore diameter of structural defects, and the thickness of the prepared MXene lamellar membrane on hydrogen and nitrogen permeance were also investigated to understand the hydrogen permeation difference from Knudsen diffusion and molecular sieving. At room temperature, the total hydrogen permeance was contributed 18% by Knudsen diffusion and 82% by molecular sieving. The modeling results indicate that molecular sieving plays a dominant role in controlling gas selectivity.

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“…Gas mixtures separation can be predicted from data measured for pure gases, provided that accurate sorption isotherms are available to compute the Maxwell-Stefan thermodynamic factors. The most significant theories adopted to model surface diffusion phenomenon are discussed in [2]. Gas translation (GT) competing with surface diffusion (SD) can describe light gases permeation through zeolite membranes for both single gas (e.g.…”

Section: Adsorption In Gas Phase Separationmentioning

confidence: 99%

About the role of adsorption in inorganic and composite membranes

Julbe¹,

Drobek²,

Ayral³

2019

Current Opinion in Chemical Engineering

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Adsorption phenomena and surface-derived reactions on interfaces are fundamentally important processes in environmental chemistry, energy, catalysis or materials processing, and play a crucial role in the control of membrane performance. Adsorption of species at the surface of membrane materials has been a vast topic of investigation for decades, with both fundamental impact and direct spin-off in industry. In this minireview, the pivotal role of adsorption for both gas-and liquid-phase membrane separations is underlined with a focus on inorganic and composite membrane materials, their design strategies, transport mechanisms and associated performance. A particular attention is dedicated to fouling phenomena and emerging surface treatment methods. Finally the role of adsorption for membrane microstructure characterisation and defect detection is discussed.

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Kinetic Modeling of Pure and Multicomponent Gas Permeation Through Microporous Membranes: Diffusion Mechanisms and Influence of Isotherm Type

Cited by 22 publications

References 136 publications

Pulverization characteristics of coal from a strong outburst-prone coal seam and their impact on gas desorption and diffusion properties

Pulverization characteristics of coal from a strong outburst-prone coal seam and their impact on gas desorption and diffusion properties

Theoretical and Experimental Insights into the Mechanism for Gas Separation through Nanochannels in 2D Laminar MXene Membranes

About the role of adsorption in inorganic and composite membranes

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