CFD modeling of the H 2 /N 2 separation with a nickel/α-alumina microporous membrane

Benguerba, Yacine; Amer, J.; Ernst, Barbara

doi:10.1016/j.ces.2014.11.048

Cited by 13 publications

(2 citation statements)

References 17 publications

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“…In our recent studies, a nanoporous layer fabricated through spin-coating technique was investigated through Fourier Transform Infrared (FT-IR) spectroscopy and SEM microanalysis, evidencing that no other contaminants besides those introduced by zeolite and thermal degradation of the oil are present [3,11,33]. One of the prerequisites for zeolite gas adsorption is the permeation of gas molecules through the Ni layer, whose mechanism is widely investigated in [44,45]. FT-IR spectroscopy ( Figure 4a) was performed on the nanoporous layer (without upper metal electrode) to characterize the zeolite layer.…”

Section: Sensor Manufacturing and Characterizationmentioning

confidence: 99%

An Affordable Fabrication of a Zeolite-Based Capacitor for Gas Sensing

Pullano

Falcone

Critello

et al. 2020

Sensors

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The development of even more compact, inexpensive, and highly sensitive gas sensors is widespread, even though their performances are still limited and technological improvements are in continuous evolution. Zeolite is a class of material which has received particular attention in different applications due to its interesting adsorption/desorption capabilities. The behavior of a zeolite 4A modified capacitor has been investigated for the adsorption of nitrogen (N2), nitric oxide (NO) and 1,1-Difluoroethane (C2H4F2), which are of interest in the field of chemical, biological, radiological, and nuclear threats. Sample measurements were carried out in different environmental conditions, and the variation of the sensor electric capacitance was investigated. The dielectric properties were influenced by the type and concentration of gas species in the environment. Higher changes in capacitance were shown during the adsorption of dry air (+4.2%) and fluorinated gas (+7.3%), while lower dielectric variations were found upon exposure to N2 (−0.4%) and NO (−0.5%). The proposed approach pointed-out that a simple fabrication process may provide a convenient and affordable fabrication of reusable capacitive gas sensor.

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Section: Sensor Manufacturing and Characterizationmentioning

confidence: 99%

An Affordable Fabrication of a Zeolite-Based Capacitor for Gas Sensing

Pullano

Falcone

Critello

et al. 2020

Sensors

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“…The most rigorous simulation approach, in that case, is to perform CFD (Computational Fluid Dynamics) simulations, which enable 2D or 3D simultaneous resolutions of momentum, mass, and energy balances [16]. Surprisingly, very few studies have been reported where CFD is applied to membrane gas separations processes [17]. Additionally, a large portion of these studies are applied to H 2 /palladium separations, which show an infinite H 2 selectivity (that is, a single-species transmembrane flux) [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Impact of Concentration Polarization Phenomena on Gas Separation Processes with High-Performance Zeolite Membranes: Experiments vs. Simulations

Abdul Majid,

Kuznetsova,

Castel

et al. 2024

Membranes

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Polarization phenomena play a key role in membrane separation processes but remain largely unexplored for gas separations, where the mass transfer resistance is most often limited to the membrane. This assumption, which is commonly used today for the simulation of membrane gas separations, has to be reconsidered when high-performance materials, showing a very high permeance and/or selectivity, are used. In this study, a series of steady-state separation performances experimentally obtained on CO2/CH4 mixtures with a zeolite membrane are compared to the predictions of a dedicated 1D approach, recently derived and validated through CFD simulations. Polarization effects are shown to generate a significant negative impact on the separation performances, both in terms of the productivity and separation efficiency. The 1D model predictions, based on pure gas permeance data and without any adjustable parameters, are in very good agreement with the experimental data. This fast and efficient modeling approach can easily be implemented in simulation or process synthesis programs for the rigorous evaluation of membrane gas separation processes, when high-performance materials are used.

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