Microstructural characterization of self-supported 1.6μm Pd/Ag membranes

Mekonnen, Wakshum; Arstad, Bjørnar; Klette, H.; Walmsley, John C.; Bredesen, Rune; Venvik, Hilde J.; Holmestad, Randi

doi:10.1016/j.memsci.2007.11.022

Cited by 36 publications

(18 citation statements)

References 27 publications

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“…Palladium membranes are promising for use in pure hydrogen production because of their high hydrogen flux and almost complete hydrogen selectivity [1,2], and several alloys are expected to be useful [3][4][5]. Properties required for purified hydrogen production are not only purity but also the flow rate for improvement in productivity.…”

Section: Introductionmentioning

confidence: 99%

“…Self-supported Pd-based thin membranes of less than 10 m thicknesses, as prepared by sputtering [4] and electroless plating [7], have already been reported. Mekonnen et al obtained 1.6 m thick Pd/Ag foil by sputtering on a single crystal Si substrate [4].…”

Section: Introductionmentioning

confidence: 99%

“…Mekonnen et al obtained 1.6 m thick Pd/Ag foil by sputtering on a single crystal Si substrate [4]. A piece of foil was lifted off the substrate and sealed between two steel plates with 17.5 mm drilled holes to form a membrane assembly.…”

Section: Introductionmentioning

confidence: 99%

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Preparation Technique of a Single Pd Membrane Using Electroless Plating for Hydrogen Permeation

Mukaida

Takahashi

Ishitsuka

et al. 2014

Trans. Mat. Res. Soc. Japan

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The hydrogen permeation rate reached 860 mL/min with a single membrane. The value was achieved by the result of obtaining thin and large membranes with no defect using an electroless plating method. The obtained membranes were self-supported. They were separated from substrate with no damage by introducing a Pd-containing sacrificial layer with subsequent Pd nanoparticle activation, plating and mild removal. The increased Pd nucleus and homogeneous dispersion of Pd nuclei were effective for obtaining thin and large membranes without a pinhole. The membrane minimum thickness was less than 5 m. The area size of obtained membranes was larger than 5600 mm 2 . Hydrogen permeation tests were conducted for the effective area of 1013 mm 2 . When a gas mixture including H 2 , CO, and CO 2 was introduced into the feed side, gas chromatography detected no other gas but hydrogen in the permeation side. The hydrogen permeation flux data were evaluated using Sieverts' law and the power law. The hydrogen permeation rate of the self-supported membrane was stable for nearly 1400 hrs.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Preparation Technique of a Single Pd Membrane Using Electroless Plating for Hydrogen Permeation

Mukaida

Takahashi

Ishitsuka

et al. 2014

Trans. Mat. Res. Soc. Japan

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“…In the former case, thinner membranes, however, suffer from mechanical instability, and can lead to the formation of pinholes. For instance, Mekonnen and co-authors [12] reported that de-alloying of 1.6 mm-thick Pde23Ag (Pd:Ag ¼ 77:23 wt%) membranes was associated with the presence of Fe impurity which possibly originated from some reactor components. These degradations of membrane materials can adversely influence the hydrogen selectivity of the membranes, reducing the purity of hydrogen produced.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen production from methane using vanadium-based catalytic membrane reactors

Matsuka

Higashi

Ishihara

2013

International Journal of Hydrogen Energy

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“…Advancements in viable processes for deposition of ultra thin, large area Pd alloy coatings are also necessary, probably including electro-and electroless plating, and physical vapor deposition. 11,35,37,46,49,68 The objective of the present work was to investigate the properties of the V-I OPd alloy as a potential membrane material. By alloying V with Pd, it was anticipated that the durability of the material in hydrogen would be increased while maintaining the high hydrogen permeability characteristic of V. We evaluated the hydrogen permeability of PdIV-IOPdlPd composite membranes and other properties such as long term thermal stability to demonstrate that the V-IOPd alloy has improved properties for membrane applications compared to pure V.…”

Section: Introductionmentioning

confidence: 99%

Development of membranes for hydrogen separation: Pd coated V–10Pd

Paglieri

Wermer

Buxbaum³

et al. 2008

Energy Materials

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Numerous Group IVB and VB alloys were prepared and tested as potential membrane materials but most of these materials were brittle or exhibited cracking during hydrogen exposure. One of the more ductile alloys, V -lOPd (at. %), was fabricated into a thin 5 (avg. of three different samples) at 400°C, which is slightly higher than the permeability of Pd-23Ag at that temperature. A 1400 h hydrogen flux test at 400°C demonstrated that the rate of metallic interdiffusion was slow between the V -lOPd foil and the l00-nm-thick Pd coating on the surface. However, at the end of testing the membrane cracked at 118°C because of hydrogen embrittlement.keywords: hydrogen permeability, hydrogen flux, vanadium alloy membrane, palladium, embrittlement,

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Microstructural characterization of self-supported 1.6μm Pd/Ag membranes

Cited by 36 publications

References 27 publications

Preparation Technique of a Single Pd Membrane Using Electroless Plating for Hydrogen Permeation

Preparation Technique of a Single Pd Membrane Using Electroless Plating for Hydrogen Permeation

Hydrogen production from methane using vanadium-based catalytic membrane reactors

Development of membranes for hydrogen separation: Pd coated V–10Pd

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