Preparation and catalysis over palladium composite membranes

Gryaznov, V. M.; Serebryannikova, O. S.; Serov, Yu. M.; Ермилова, М. М.; Karavanov, A. N.; Mischenko, A. P.; Орехова, Н. В.

doi:10.1016/0926-860x(93)80003-9

Cited by 81 publications

(20 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Ultrathin Pd composite membranes were prepared by the sputter-deposition technique on polymeric membranes (Athayde et al, 1994), porous alumina (Jayaraman et al, 1995a, b), anodic alumina (Konno et al, 1988;Mardilovich et al, 1996a), and Vycor glass (Bryden and Ying,199.5) supports. Gryaznov et al (1993) prepared Pd and Pd-alloy membranes on polymer membranes, porous stainless steel, and oxide plates by magnetic sputtering. Recently (Peachey et al, 19961, electron-beam evaporation and ion-beam sputtering were used to deposit Pd on the surface of tantalum foil.…”

Section: Fluxes Of Gases Impermeable Through the Pd Were Quantitatimentioning

confidence: 99%

Defect‐free palladium membranes on porous stainless‐steel support

et al. 1998

View full text Add to dashboard Cite

show abstract

Section: Fluxes Of Gases Impermeable Through the Pd Were Quantitatimentioning

confidence: 99%

Defect‐free palladium membranes on porous stainless‐steel support

et al. 1998

View full text Add to dashboard Cite

show abstract

“…During rinsing with deionized water after immersion in the acidic SnCl 2 bath, the partial hydrolysis of Sn 2+ takes place to form little poorly soluble product, Sn(OH) 1.5 Cl 0.5 and other more complicated hydroxy-chlorides [11]. It is replaced by Pd 0 via the redox step shown in Eqn.…”

Section: Sensitization and Activationmentioning

confidence: 99%

Separation of Hydrogen and Carbon Dioxide Using a Novel Membrane Reactor in Advanced Fossil Energy Conversion Process

Ilias¹

2005

View full text Add to dashboard Cite

Inorganic membrane reactors offer the possibility of combining reaction and separation in a single operation at high temperatures to overcome the equilibrium limitations experienced in conventional reactor configurations. Such attractive features can be advantageously utilized in a number of potential commercial opportunities, which include dehydrogenation, hydrogenation, oxidative dehydrogenation, oxidation and catalytic decomposition reactions. However, to be cost effective, significant technological advances and improvements will be required to solve several key issues which include: (a) permselective thin solid film, (b) thermal, chemical and mechanical stability of the film at high temperatures, and (c) reactor engineering and module development in relation to the development of effective seals at high temperature and high pressure.In this project, we are working on the development and application of palladium and palladium-silver alloy thin-film composite membranes in membrane reactor-separator configuration for simultaneous production and separation of hydrogen and carbon dioxide at high temperature. From our research on Pd-composite membrane, we have demonstrated that the new membrane has significantly higher hydrogen flux with very high perm-selectivity than any of the membranes commercially available. The steam reforming of methane by equilibrium shift in Pdcomposite membrane reactor is being studied to demonstrate the potential application of this new development.A two-dimensional, pseudo-homogeneous membrane-reactor model was developed to investigate the steam-methane reforming (SMR) reactions in a Pd-based membrane reactor. Radial diffusion was taken into consideration to account for the concentration gradient in the radial direction due to hydrogen permeation through the membrane. With appropriate reaction rate expressions, a set of partial differential equations was derived using the continuity equation for the reaction system. The equations were solved by finite difference method. The solution of the model equations is complicated by the coupled reactions. At the inlet, if there is no hydrogen, rate expressions become singular. To overcome this problem, the first element of the reactor was treated as a continuous stirred tank reactor (CSTR). Several alternative numerical schemes were implemented in the solution algorithm to get a converged, stable solution. The model was also capable of handling steam-methane reforming reactions under non-membrane condition and equilibrium reaction conversions. Some of the numerical results were presented in the previous report.To test the membrane reactor model, we fabricated Pd-stainless steel membranes in tubular configuration using electroless plating method coupled with osmotic pressure. Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray (EDX) were used to characterize the fabricated Pd-film composite membranes. Gas-permeation tests were performed to measure the permeability of hydrogen, nitrogen and helium using pure gas. The membranes s...

show abstract

“…The main problems arise from the difficulty to prepare a Pd-based alloy composite membrane. Gryaznov, et al [8] used a sputtering technique to prepare Pd-Ru-In alloy composite membrane with a thickness of 2 m. It was shown that the membrane resisted to 450 temperature cycles of room temperature to 400 • C in an H 2 atmosphere during one-month operation. It should be mentioned that the interfacial adhesion of sputtering-derived Pd-based membrane could be a problem.…”

Section: Introductionmentioning

confidence: 99%

“…Electroless plating [3][4][5][6][7], sputtering [8][9][10] and chemical vapor deposition [11][12][13][14][15] have been explored to produce Pd-based composite membranes.…”

Section: Introductionmentioning

confidence: 99%