Electroless plating synthesis, characterization and permeation properties of Pd–Cu membranes supported on ZrO modified porous stainless steel

Gao, Huiyuan; Lin, Jerry Y S; Li, Yongdan; Zhang, Baoquan

doi:10.1016/j.memsci.2005.04.050

Cited by 120 publications

(57 citation statements)

References 65 publications

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“…20 An intermediate layer of c-alumina or YSZ was coated on one side of the support disk by the sol-gel method. Boehmite sol was prepared by the procedure reported by Yoldas, 39 and YSZ sol was made according to the method of Gao et al 18 for preparation of zirconia sol, with the procedure modified to add 0.07M yttrium nitrate (Aldrich, 99.9%) solution, to obtain 8 mol % YSZ. Both sols were mixed with 5 wt % poly (vinyl alcohol) (PVA, Fluka, MW 5 72,000) to prevent crack formation during heat treatment process.…”

Section: Methodsmentioning

confidence: 99%

Effect of metal‐support interface on hydrogen permeation through palladium membranes

et al. 2009

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in Wiley InterScience (www.interscience.wiley.com).Thin palladium membranes of different thicknesses were prepared on sol-gel derived mesoporous c-alumina/a-alumina and yttria-stabilized zirconia/a-alumina supports by a method combining sputter deposition and electroless plating. The effect of metalsupport interface on hydrogen transport permeation properties was investigated by comparing hydrogen permeation data for these membranes measured under different conditions. Hydrogen permeation fluxes for the Pd/c-Al 2 O 3 /a-Al 2 O 3 membranes are significantly smaller than those for the Pd/YSZ/a-Al 2 O 3 membranes under similar conditions. As the palladium membrane thickness increases, the difference in permeation fluxes between these two groups of membranes decreases and the pressure exponent for permeation flux approaches 0.5 from 1. Analysis of the permeation data with a permeation model shows that both groups of membranes have similar hydrogen permeability for bulk diffusion, but the Pd/c-Al 2 O 3 /a-Al 2 O 3 membranes exhibit a much lower surface reaction rate constant with higher activation energy, due possibly to the formation of Pd-Al alloy, than the Pd/YSZ/a-Al 2 O 3 membranes.

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Section: Methodsmentioning

confidence: 99%

Effect of metal‐support interface on hydrogen permeation through palladium membranes

et al. 2009

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“…It has been tested on different type of metal and composite samples to determine the Darcian's and Forchheimer's permeabilities for inert and reactive fluids at high temperature and pressure. Similar experimental setup has been used by several authors to determine the permeability of disk and bar type specimens (Ilias et al 1997, Gao et al 2005, Papaioannou et al 2015. Ilias et al (1997) studied the permeability and selectivity of hydrogen through a palladium membrane at high temperature and low pressure.…”

Section: Flow Configuration Influence On Darcian and Forchheimer Permmentioning

confidence: 98%

“…Ilias et al (1997) studied the permeability and selectivity of hydrogen through a palladium membrane at high temperature and low pressure. Gao et al (2005) investigated the hydrogen permeability on porous stainless steel (PSS) disks coated with a mesoporous palladium impregnated zirconia intermediate layer. Papaioannou et al (2015) evaluated carbon dioxide permeability for sintered supports with molten carbonate dual-phase membranes and its performances were found to be stable for more than 200 h of operation.…”

Section: Flow Configuration Influence On Darcian and Forchheimer Permmentioning

confidence: 99%

Flow Configuration Influence on Darcian and Forchheimer Permeabilities Determination

Najmi

Tabach

Chetehouna

et al. 2016

Lecture Notes in Mechanical Engineering

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Within the framework of fuel cells, porous materials are used for filtration purpose. Determining physical properties like porosity and permeability are of utmost importance to predict and to manage filtration efficiency of the materials. The permeability of materials is often determined experimentally in laboratory with disc samples (outlet of the flow is achieved through the porous material) that are not exactly similar to the tubes which are used in realistic operating conditions (a main flow is found additionally to the one through the material). Thus, the effect of a second outlet on the Darcian's permeability characterization bench should be studied. In the present paper, we present a new test bench to determine experimentally the Darcy's and Forchheimer's permeabilities for a porous media by taking into account two outlets. Operating parameters (temperature, pressure and mass flow rate) are measured for three different configurations:O is 100% open. Then Darcy's and Forchheimer's permeability for all these three cases are compared and discussed in details. It has been found that the secondary outlet opening does not affect the Darcian's permeability but have substantial influence on the Forchheimer's one through the modifications of the range of study (lower mass flow rate penetrates the porous medium).

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“…Alloy materials, such as copper or gold, are more resistant to sulfur compounds [10][11][12]. Specially, the Pd-Cu alloy film has enhanced thermal resistance without suffering any discernible physical changes [1,9,20,21]. The H 2 -permeability of the Pd-Cu membrane passes through a maximum around 40 wt.…”

Section: Introductionmentioning

confidence: 99%

“…In recent years Pd-Cu and Pd-Ag membranes on microporous stainless steel (MPSS) and ceramic supports have been fabricated by EP using sequential depositions of Pd and other metals with some variations of the deposition process [9,14,18,21,23,[27][28][29][30][31][32][33][34][35][36]. The major objective in these studies has been to improved membrane film performance in terms of H 2 -perm-selectivity and structural integrity under thermal cycling in long-term operations.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Pd/Pd-Alloy Films by Surfactant Induced Electroless Plating for Hydrogen Separation from Advanced Coal Gasification Processes

Ilias¹,

Kumar²

2012

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Dense Pd, Pd-Cu and Pd-Ag composite membranes on microporous stainless steel substrate (MPSS) were fabricated by a novel electroless plating (EP) process. In the conventional Pd-EP process, the oxidation-reduction reactions between Pd-complex and hydrazine result in an evolution of NH 3 and N 2 gas bubbles. When adhered to the substrate surface and in the pores, these gas bubbles hinder uniform Pd-film deposition which results in dendrite growth leading to poor film formation. This problem was addressed by introducing cationic surfactant in the electroless plating process known as surfactant induced electroless plating (SIEP). The unique features of this innovation provide control of Pd-deposition rate, and Pd-grain size distribution.The surfactant molecules play an important role in the EP process by tailoring grain size and the process of agglomeration by removing tiny gas bubbles through adsorption at the gas-liquid interface. As a result surfactant can tailor a nanocrystalline Pd, Cu and Ag deposition in the film resulting in reduced membrane film thickness. Also, it produces a uniform, agglomerated film structure. The Pd-Cu and Pd-Ag membranes on MPSS support were fabricated by sequential deposition using SIEP method. The pre-and post-annealing characterizations of these membranes (Pd, Pd-Cu and Pd-Ag on MPSS substrate) were carried out by SEM, EDX, XRD, and AFM studies. The SEM images show significant improvement of the membrane surface morphology, in terms of metal grain structures and grain agglomeration compared to the membranes fabricated by conventional EP process. The SEM images and helium gas-tightness studies indicate that dense and thinner films of Pd, Pd-Cu and Pd-Ag membranes can be produced with shorter deposition time using surfactant. H 2 Flux through the membranes fabricated by SIEP shows large improvement compared to those by CEP with comparable permselectivity.Pd-MPSS composite membrane was subjected to test for long term performance and thermal cycling (573 -723 -573 K) at 15 psi pressure drop for 1200 hours. Pd membranes showed excellent hydrogen permeability and thermal stability during the operational period.Under thermal cycling (573 K -873 K -573 K), Pd-Cu-MPSS membrane was stable and retained hydrogen permeation characteristics for over three months of operation. From this limited study, we conclude that SIEP is viable method for fabrication of defect-free, robust Pd-alloy membranes for high-temperature H 2 -separation applications.iv

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Electroless plating synthesis, characterization and permeation properties of Pd–Cu membranes supported on ZrO modified porous stainless steel

Cited by 120 publications

References 65 publications

Effect of metal‐support interface on hydrogen permeation through palladium membranes

Effect of metal‐support interface on hydrogen permeation through palladium membranes

Flow Configuration Influence on Darcian and Forchheimer Permeabilities Determination

Fabrication of Pd/Pd-Alloy Films by Surfactant Induced Electroless Plating for Hydrogen Separation from Advanced Coal Gasification Processes

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