Fabrication, characterization, and application of palladium composite membrane on porous stainless steel substrate with NaY zeolite as an intermediate layer for hydrogen purification

Kiadehi, Afshin Dehghani; Taghizadeh, Majid

doi:10.1016/j.ijhydene.2018.12.058

Cited by 38 publications

(7 citation statements)

References 65 publications

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“…We considered this spectrum from polymer-based membranes [7][8][9] to inorganic dense metallic ones, which are considered highly selective towards hydrogen, operate in the demanding conditions of higher temperatures and pressures and exhibit the ability to enable a single separation step with a solution-diffusion mechanism [4,10]. While many metals have been investigated (platinum (Pt), nickel (Ni), and metallic elements of groups III-V), palladium-based membranes have the highest interest because they are not only highly selective towards hydrogen [10][11][12] but they are also thermally and mechanically stable for a variety of applications.…”

Section: Introductionmentioning

confidence: 99%

Palladium Membrane with High Density of Large-Angle Grain Boundaries to Promote Hydrogen Diffusivity

et al. 2022

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A higher density of large-angle grain boundaries in palladium membranes promotes hydrogen diffusion whereas small-angle grain boundaries suppress it. In this paper, the microstructure formation in 10 µm thick palladium membranes is tuned to achieve a submicronic grain size above 100 nm with a high density of large-angle grain boundaries. Moreover, changes in the grain boundaries’ structure is investigated after exposure to hydrogen at 300 and 500 °C. To attain large-angle grain boundaries in Pd, the coating was performed on yttria-stabilized zirconia/porous Crofer 22 APU substrates (intended for use later in an ultracompact membrane reactor). Two techniques of plasma sprayings were used: suspension plasma spraying using liquid nano-sized powder suspension and vacuum plasma spraying using microsized powder as feedstock. By controlling the process parameters in these two techniques, membranes with a comparable density of large-angle grain boundaries could be developed despite the differences in the fabrication methods and feedstocks. Analyses showed that a randomly oriented submicronic structure could be attained with a very similar grain sizes between 100 and 500 nm which could enhance hydrogen permeation. Exposure to hydrogen for 72 h at high temperatures revealed that the samples maintained their large-angle grain boundaries despite the increase in average grain size to around 536 and 720 nm for vacuum plasma spraying and suspension plasma spraying, respectively.

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Section: Introductionmentioning

confidence: 99%

Palladium Membrane with High Density of Large-Angle Grain Boundaries to Promote Hydrogen Diffusivity

et al. 2022

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“…The assembly of composite membranes, which are formed by the deposition of a thin metallic layer on a porous substrate, is a suitable alternative to decrease the membrane thickness and, consequently, to increase hydrogen permeability 12 . Furthermore, the support mechanical strength facilitates the membrane module construction 13–17 …”

Section: Introductionmentioning

confidence: 99%

Influence of external mass transfer and support resistances for hydrogen permeation through composite palladium membranes

Arzani

Neto

Terra

et al. 2021

Env Prog and Sustain Energy

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Palladium membranes represent a suitable alternative to obtain high purity hydrogen for industrial applications. The modeling of hydrogen permeation through composite membranes is important to understand gas separation systems. Here, experimental and calculated hydrogen flux data through composite palladium/alumina membranes were compared. A dense palladium film of 2.4 μm thick was deposited on a porous support and the produced composite membrane presented infinite hydrogen/nitrogen selectivity. Experimental molecular hydrogen flux at 100 kPa and 723 K was 0.1015 ± 0.0009 mol m−2 s−1. Calculated molecular hydrogen fluxes with the conventional permeation model, without considering external mass transfer and support resistances, were at least 5.7 times greater than experimental data. However, calculated hydrogen flux was only 6.7% lower than the experimental flux at 100 kPa and 723 K when external mass transfer and support resistances were included in the conventional permeation model. Thus, external mass transfer resistances and the permeation through the porous support should be considered for a suitable description of hydrogen fluxes through composite palladium membranes.

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“…The key point for fabricating catalytic membrane reactors is to functionalize its surface to immobilize packed solid catalyst particles [1][2][3] . Although the technology of organizing molecules building blocks into complex structures has become common for scientists in recent years.…”

Section: Introductionmentioning

confidence: 99%

Plasma deposited high density amines on surface using (3-aminopropyl)triethoxysilane for assembling particles at near-nano size

Rao

Abou‐Hassan

Guyon

et al. 2020

Materials Chemistry and Physics

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Fabrication, characterization, and application of palladium composite membrane on porous stainless steel substrate with NaY zeolite as an intermediate layer for hydrogen purification

Cited by 38 publications

References 65 publications

Palladium Membrane with High Density of Large-Angle Grain Boundaries to Promote Hydrogen Diffusivity

Palladium Membrane with High Density of Large-Angle Grain Boundaries to Promote Hydrogen Diffusivity

Influence of external mass transfer and support resistances for hydrogen permeation through composite palladium membranes

Plasma deposited high density amines on surface using (3-aminopropyl)triethoxysilane for assembling particles at near-nano size

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