Fabrication and operational considerations of hydrogen permeable Mo2C/V metal membranes and improvement with application of Pd

Fuerst, Thomas F.; Zhang, Zhenyu; Hentges, Abigail M.; Lundin, Sean-Thomas B.; Wolden, Colin A.; Way, J. Douglas

doi:10.1016/j.memsci.2017.12.030

Cited by 23 publications

(16 citation statements)

References 49 publications

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“…However, the trend observed with the TiC/V system indicates that surface reactions, or other activated processes, control transport through the membrane. This is not uncommon for vanadium-based membranes. , Alimov et al suggests the increase in H 2 dissociative sticking probability with temperature caused this phenomena in Pd coated V–Pd alloy membranes.…”

Section: Resultsmentioning

confidence: 97%

“…Alternatively, non-Pd coatings that do not interdiffuse with V can be applied. Our group demonstrated the functionality of the transition metal carbide (TMC) Mo 2 C as a stable alternative to Pd. − Thin coatings of Mo 2 C facilitate surface reactions and transport H atoms to the bulk vanadium via a spillover mechanism–surface diffusion along grain boundaries. V 2 O 3 fabricated by intentionally oxidizing the vanadium surfaces also provides an alternative coating, though the temperature range for stable operation is limited. , …”

Section: Introductionmentioning

confidence: 99%

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Application of TiC in Vanadium-Based Hydrogen Membranes

Fuerst

Petsalis

Wolden

et al. 2018

Ind. Eng. Chem. Res.

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Transition metal carbide coated vanadium membranes for hydrogen permeation have the unique ability to operate at both high temperatures and pressures. Titanium carbide deposited by magnetron sputtering produced dense, nanocrystalline films preferentially oriented in the ( 111) plane. When applied on vanadium foils, TiC was a highly active catalytic coating enabling permeation of ultrapure H 2 with fluxes up to 0.71 mol m −2 s −1 at 10 bar and 923 K. The TiC thickness controlled H 2 transport in the composite membranes. Thicker TiC films and low temperature operation yielded n-values >1, which were likely resultant of adsorption effects and surface diffusion through the carbide layer. Competitive adsorption in mixed gas environments inhibited H 2 flux through TiC/V membranes, but addition of thin (50−100 nm) Pd films to the TiC surface instilled chemical resistance and improved permeation at 773 K. Permeation attenuated for membranes with TiC thicknesses <20 nm but 23 nm thick coatings demonstrated stable flux for 30 h.

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Section: Resultsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Application of TiC in Vanadium-Based Hydrogen Membranes

Fuerst

Petsalis

Wolden

et al. 2018

Ind. Eng. Chem. Res.

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“…Group V metals are also less expensive than palladium, and have impressive hydrogen permeabilities way higher than that of palladium [13,18]. However, they suffer from hydrogen embrittlement and poisoning of active sites for hydrogen dissociation on the surface [12,13,18,19]. Early attempts to overcome surface poisoning of group V metal membranes were made in 1967, when Makrides, Wright, and Jewett patented membranes made from group V metals coated with thin layers of palladium on both sides [20].…”

Section: Palladium Based Composite Membranes Via Suspension Plasmamentioning

confidence: 99%

“…Early attempts to overcome surface poisoning of group V metal membranes were made in 1967, when Makrides, Wright, and Jewett patented membranes made from group V metals coated with thin layers of palladium on both sides [20]. Publications from the last years, on group V metal-based hydrogen membranes with palladium-based or transition metal carbide protection layers, show further development but also outline tremendous challenges, among which, attenuation of hydrogen flux over time in consequence of, for instance, interdiffusion of membrane and top-layer materials at elevated temperatures [18,19,21,22].…”

Section: Palladium Based Composite Membranes Via Suspension Plasmamentioning

confidence: 99%

Recent Developments in Compact Membrane Reactors with Hydrogen Separation

et al. 2018

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Hydrogen production and storage in small and medium scale, and chemical heat storage from renewable energy, are of great interest nowadays. Micro-membrane reactors for reforming of methane, as well as for the dehydrogenation of liquid organic hydrogen carriers (LOHCs), have been developed. The systems consist of stacked plates with integrated palladium (Pd) membranes. As an alternative to rolled and electroless plated (Pd) membranes, the development of a cost-effective method for the fabrication of Pd membranes by suspension plasma spraying is presented.

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“…Pd/Nb-Ti-Co/Pd composite membranes, are generally used. When the operating temperature is higher than 400 � C, interdiffusion between the Pd catalytic layer and the substrate alloys occurs, which leads to degradation of hydrogen flux [20]. In recent years, investigations on the formation of the intermediate layer of low hydrogen permeability [21,22], and the formation of pinholes and cracks in the Pd catalytic layer [23] started.…”

Section: Introductionmentioning

confidence: 99%

Degradation of Pd/Nb30Ti35Co35/Pd hydrogen permeable membrane: A numerical description

Xiao

Nagaumi³

et al. 2020

Journal of Membrane Science

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Fabrication and operational considerations of hydrogen permeable Mo2C/V metal membranes and improvement with application of Pd

Cited by 23 publications

References 49 publications

Application of TiC in Vanadium-Based Hydrogen Membranes

Application of TiC in Vanadium-Based Hydrogen Membranes

Recent Developments in Compact Membrane Reactors with Hydrogen Separation

Degradation of Pd/Nb30Ti35Co35/Pd hydrogen permeable membrane: A numerical description

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