Single and binary surface diffusion permeation through zeolite membranes using new Maxwell-Stefan factors for Dubinin-type isotherms and occupancy-dependent kinetics

Cardoso, Simão P.; Azenha, Ivo S.; Portugal, Inês; Lin, Zhi; Rodrigues, Alírio E.; Silva, Carlos M.

doi:10.1016/j.seppur.2017.03.036

Cited by 14 publications

(9 citation statements)

References 56 publications

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“…D CO 2 * represents the local diffusivity of the CO 2 component under the presence of intermolecular friction with CH 4 and C 2 H 6 . It can be derived from the pure component diffusivity ( D CO 2 ) and the exchange diffusivity ( D ij ) using eq . , 1 D CO 2 * = 1 D CO 2 + θ CH 4 D CO 2 − CH 4 + θ C 2 H 6 D CO 2 − C 2 H 6 D CO 2 − j = D CO 2 θ CO 2 / false( θ normalCO <...…”

Section: Resultsmentioning

confidence: 99%

“…D CO 2 * represents the local diffusivity of the CO 2 component under the presence of intermolecular friction with CH 4 and C 2 H 6 . It can be derived from the pure component diffusivity ( D CO 2 ) and the exchange diffusivity ( D ij ) using eq . , The factor a was the correction factor by considering the competitive adsorption, which can be estimated by the following equation. …”

Section: Resultsmentioning

confidence: 99%

“…D COd 2 * represents the local diffusivity of the CO 2 component under the presence of intermolecular friction with CH 4 and C 2 H 6 . It can be derived from the pure component diffusivity (D COd 2) and the exchange diffusivity (D ij ) using eq 9 47,48.…”

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confidence: 99%

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Effect of Light Gas Components on CO₂ Permeation through DD3R Membranes

Song

Peng

You

et al. 2022

Ind. Eng. Chem. Res.

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Membrane technology has emerged to be a promising alternative for natural gas upgrading. Zeolite membranes are attracting more and more attention because of the hydrothermal and chemical stability. However, the zeolite membranes are generally evaluated in the unary or binary CO2/CH4 components, which is far from the real applications. Herein we investigated the CO2 permeation through DD3R zeolite membranes under the presence of light gas components (e.g., N2, CH4, C2H6, and SF6). The CO2 diffusivity was calculated by the generalized Maxwell-Stefan model for more insights on CO2 transport. The diffusion of CO2 molecules was slightly affected by the presence of N2, CH4, and SF6. However, the CO2 diffusivity in equimolar CO2/C2H6 was one magnitude lower than that of pure CO2 component because of the strong competitive adsorption and slow diffusion of C2H6 molecules. An empirical formula was proposed to predict the CO2 diffusivity in the CO2/CH4/C2H6 ternary mixture. The predicted CO2 flux matched well with the experimental one for the mixture containing less than 15 mol % C2H6. This would provide a facile method to determine the required membrane area for multicomponent mixture separation.

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Section: Resultsmentioning

confidence: 99%

“…D CO 2 * represents the local diffusivity of the CO 2 component under the presence of intermolecular friction with CH 4 and C 2 H 6 . It can be derived from the pure component diffusivity ( D CO 2 ) and the exchange diffusivity ( D ij ) using eq . , The factor a was the correction factor by considering the competitive adsorption, which can be estimated by the following equation. …”

Section: Resultsmentioning

confidence: 99%

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Effect of Light Gas Components on CO₂ Permeation through DD3R Membranes

Song

Peng

You

et al. 2022

Ind. Eng. Chem. Res.

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“…The adsorption experiments were performed at temperatures of between 90 • C and 120 • C and the permeation experiments were performed at temperatures ranging from 120 • C to 220 • C. Therefore, the adsorption isotherms must be extrapolated in order to be used to calculate the diffusion coefficients. There are several approaches to extrapolating adsorption isotherms, including the Langmuir and Dubin-Radushkevish isotherms [16,37].…”

Section: Adsorption Isotherm Temperature Extrapolationmentioning

confidence: 99%

Pure Hydrogen and Methane Permeation in Carbon-Based Nanoporous Membranes: Adsorption Isotherms and Permeation Experiments

Kurth,

Javed,

Schliermann

et al. 2024

Membranes

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This paper presents the results of adsorption and permeation experiments of hydrogen and methane at elevated temperatures on a carbon-based nanoporous membrane material provided by Fraunhofer IKTS. The adsorption of pure components was measured between 90 °C and 120 °C and pressures up to 45. The Langmuir adsorption isotherm shows the best fit for all data points. Compared to available adsorption isotherms of H2 and CH4 on carbon, the adsorption on the investigated nanoporous carbon structures is significantly lower. Single-component permeation experiments were conducted on membranes at temperatures up to 220 °C. After combining the experimental results with a Maxwell–Stefan surface diffusion model, Maxwell–Stefan surface diffusion coefficients Dis were calculated. The calculated values are in line with an empirical model and thus can be used in future multi-component modeling approaches in order to better analyze and design a membrane system. The published adsorption data fill a gap in the available adsorption data for CH4 and H2.

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“…Furthermore, inorganic porous materials have been explored for different kinds of gas mixtures [215][216][217][218][219]. In particular, carbon molecular sieve (CMS) membranes are strong candidates for energy-efficient gas separation applications, due to their known higher separation performances, stability to corrosive environments and temperatures (up to ca.…”

Section: Membranes For Gas Separationmentioning

confidence: 99%

Overview of Membrane Science and Technology in Portugal

et al. 2022

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Membrane research in Portugal is aligned with global concerns and expectations for sustainable social development, thus progressively focusing on the use of natural resources and renewable energy. This review begins by addressing the pioneer work on membrane science and technology in Portugal by the research groups of Instituto Superior Técnico—Universidade de Lisboa (IST), NOVA School of Science and Technology—Universidade Nova de Lisboa (FCT NOVA) and Faculdade de Engenharia—Universidade do Porto (FEUP) aiming to provide an historical perspective on the topic. Then, an overview of the trends and challenges in membrane processes and materials, mostly in the last five years, involving Portuguese researchers, is presented as a contribution to a more sustainable water–energy–material–food nexus.

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Single and binary surface diffusion permeation through zeolite membranes using new Maxwell-Stefan factors for Dubinin-type isotherms and occupancy-dependent kinetics

Cited by 14 publications

References 56 publications

Effect of Light Gas Components on CO₂ Permeation through DD3R Membranes

Effect of Light Gas Components on CO₂ Permeation through DD3R Membranes

Pure Hydrogen and Methane Permeation in Carbon-Based Nanoporous Membranes: Adsorption Isotherms and Permeation Experiments

Overview of Membrane Science and Technology in Portugal

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Single and binary surface diffusion permeation through zeolite membranes using new Maxwell-Stefan factors for Dubinin-type isotherms and occupancy-dependent kinetics

Cited by 14 publications

References 56 publications

Effect of Light Gas Components on CO2 Permeation through DD3R Membranes

Effect of Light Gas Components on CO2 Permeation through DD3R Membranes

Pure Hydrogen and Methane Permeation in Carbon-Based Nanoporous Membranes: Adsorption Isotherms and Permeation Experiments

Overview of Membrane Science and Technology in Portugal

Contact Info

Product

Resources

About

Effect of Light Gas Components on CO₂ Permeation through DD3R Membranes

Effect of Light Gas Components on CO₂ Permeation through DD3R Membranes