Innovations in Palladium Membrane Research

Paglieri, Stephen N.; Way, J. Douglas

doi:10.1081/spm-120006115

Cited by 615 publications

(456 citation statements)

References 945 publications

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“…Palladium-based membranes have high selectivities and permeabilities for hydrogen due to their unique permeation mechanism described by the Sieverts' law [1]. Pure Pd membranes are often damaged by hydrogen embrittlement due to the  phase transition of palladium hydride which occurs at below the critical temperature (300 o C) and pressure (2 MPa) [4,5]; embrittlement can be minimized by alloying palladium with Ag, Cu or Au [6e8]. Another challenge to Pd membranes is that the presence of S-containing compounds such as hydrogen sulphide (H2S), which poison the membrane [9].…”

Section: Introductionmentioning

confidence: 99%

Composite-alumina-carbon molecular sieve membranes prepared from novolac resin and boehmite. Part II: Effect of the carbonization temperature on the gas permeation properties

Tanco

Tanaka

Mendes

2015

International Journal of Hydrogen Energy

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The influence of carbonization temperature on the permeation properties and aging of thin (4 m) supported carbon molecular sieve membranes (c-CMSM), prepared from in house synthesized novolac phenolic resin loaded with boehmite nanoparticles, were studied. Just after membrane carbonization (fresh membrane), high permeance to N2 and O2 and low O2/ N2 permselectivities were observed; the highest permeations were observed for carbonization end temperatures between 500 o C and 700 o C. After leaving the c-CMSM 1 day in the air, a large decrease in the permeation and considerable increase in the permselectivity were observed due to the reduction of the pore size by oxygen chemisorption and water physical adsorption; the permeability to H2 and H2/N2 ideal permselectivity for a mem-brane carbonized at 550 o C are close to palladium membranes for low temperature (<100 o C). The effect of the permeation characteristics of the membranes carbonized at various temperatures and the removal of water adsorbed in the pores by heat treatment were studied.

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Section: Introductionmentioning

confidence: 99%

Composite-alumina-carbon molecular sieve membranes prepared from novolac resin and boehmite. Part II: Effect of the carbonization temperature on the gas permeation properties

Tanco

Tanaka

Mendes

2015

International Journal of Hydrogen Energy

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“…These molecules are split on the palladium surface, before diffusing through the palladium as atomic hydrogen. On the opposite surface it is widely reported [8,9] that hydrogen undergoes recombinative desorption and is released once more as molecular hydrogen. Contrary to this expectation Fig.…”

Section: Discussionmentioning

confidence: 99%

“…This palladium leaf is intended to absorb the UV photons and prevent them reaching the silicon surface, while allowing hydrogen to pass through. Palladium was chosen due to its high permeability to hydrogen, as evidenced by its use in hydrogen purification membranes [8,9]. Furthermore, since the palladium leaf is electrically connected to ground, hydrogen passing through the leaf will be neutralized preventing ions or any energetic species striking the sample.…”

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confidence: 99%

A novel source of atomic hydrogen for passivation of defects in silicon

Hamer

Bourret‐Sicotte

Martins

et al. 2017

Physica Rapid Research Ltrs

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Palladium membranes have been used for decades for the separation of hydrogen from other gasses. In this letter the use of thin palladium leaves to act as sources of atomic hydrogen for silicon samples is explored. It has been assumed in the past that although hydrogen diffuses through palladium in atomic form, the atoms recombine to form molecular hydrogen at the surface. In this letter it is shown that hydrogen supplied to one surface of a palladium leaf can result in atomic hydrogen being released from the opposite surface at low pressure. This is demonstrated through the use of a palladium leaf in a direct plasma system which allows for atomic hydrogen to be supplied to a sample while avoiding exposure to UV radiation from the plasma and high energy charged particles. This method is shown to provide significant atomic hydrogen to silicon samples and improve passivation of silicon surfaces. Method of Shielded Hydrogen Passivation: Schematic of direct plasma chamber with a shield inserted between the plasma and the silicon sample.

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Section: Introductionmentioning

confidence: 99%

“…[1][2][3][4][5] For example, Pd-Ag or Pd-Cu alloy membranes are widely used practically for the separation and purification of hydrogen gas. 5 Recently, there has been a great demand for the development of new hydrogen permeable alloys to reduce the material cost as well as to improve the hydrogen permeability. [6][7][8][9][10][11] Nb-based and V-based alloys are promising materials for hydrogen permeable membrane to be substituted for currently used Pd-based alloys.…”

Section: Introductionmentioning

confidence: 99%

Consistent description of hydrogen permeation through metal membrane based on hydrogen chemical potential and its application to alloy design

2016

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A consistent description of the hydrogen permeation through metal membrane based on hydrogen chemical potential proposed has been explained in detail. The hydrogen flux is proportional to the PCT factor, f PCT , consistently, which reflects the shape of the pressure-composition-isotherm (PCT curve) of the material. In addition, in view of the PCT factor, f PCT , and the ductile-to-brittle transition hydrogen concentration, DBTC, a concept for alloy design with high hydrogen permeability and strong resistance to hydrogen embrittlement has been proposed. In this concept, it is important to design alloy composition with appropriate PCT curve under the given pressure and temperature condition. As an example, V-9 mol% Al alloy has been designed, which exhibits high hydrogen flux without brittle fracture under given condition. Thus, the new consistent description is useful not only for the understanding of the hydrogen permeation property but also for the alloy design.

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Innovations in Palladium Membrane Research

Cited by 615 publications

References 945 publications

Composite-alumina-carbon molecular sieve membranes prepared from novolac resin and boehmite. Part II: Effect of the carbonization temperature on the gas permeation properties

Composite-alumina-carbon molecular sieve membranes prepared from novolac resin and boehmite. Part II: Effect of the carbonization temperature on the gas permeation properties

A novel source of atomic hydrogen for passivation of defects in silicon

Consistent description of hydrogen permeation through metal membrane based on hydrogen chemical potential and its application to alloy design

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