Journal ArticleDOI
Hydrogen transport through tubular membranes of palladium-coated tantalum and niobium
TLDR
In this paper, the authors describe experiments with hydrogen extraction membranes made of palladium-coated niobium and tantalum heat-exchanger tubes, and the fluxes were as high as 0.001 47 mol/m2 s Pa1/2 at 420 °C.Abstract:
Palladium-based membranes have been used for decades in hydrogen extraction because of their high permeability and good surface properties and because palladium, like all metals, is 100% selective for hydrogen transport. We describe experiments with hydrogen-extraction membranes made of palladium-coated niobium and tantalum heat-exchanger tubes. The cost was about $45/ft of 3/8 in. tubular membrane, and the fluxes were as high as 0.001 47 mol/m2 s Pa1/2 at 420 °C. The main transport resistance is in the refractory metal substrate. Durability tests showed a 15% reduction in flux for 31 days of continuous membrane operation. Assuming durability is maintained for at least 1 year, this price and flux should allow competitive application for hydrogen recovery in petrochemical plants and for membrane reactors.read more
Citations
More filters
Journal ArticleDOI
Membranes for hydrogen separation.
Nathan W. Ockwig,Tina M. Nenoff +1 more
TL;DR: Comparing H2 versus CO2 Selective Polymeric Membranes 4103 and Disadvantages of Carbon Membrane 4098 5.2.1.
Journal ArticleDOI
Separation and Capture of CO2 from Large Stationary Sources and Sequestration in Geological Formations—Coalbeds and Deep Saline Aquifers
TL;DR: This review will cover the capture and geologic sequestration of CO2 generated from large point sources, namely fossil-fuel-fired power gasification plants and makes the case that this can all be accomplished safely with off-the-shelf technologies.
Journal ArticleDOI
Innovations in palladium membrane research
S. N. Paglieri,J. D. Way +1 more
TL;DR: A review of palladium membrane research can be found in this article, where the authors highlight various aspects of current palladium-based membrane research and serve as a comprehensive bibliography covering palladium preparation methods and applications.
Journal ArticleDOI
Membrane reactors for hydrogenation and dehydrogenation processes based on supported palladium
TL;DR: In this article, the authors discuss two different membrane reactor concepts which both rely on supported palladium, on the one hand as a permselective membrane material, and on the other hand as base component of a membrane-type hydrogenation catalyst.
Journal ArticleDOI
Model of hydrogen permeation behavior in palladium membranes
Timothy L. Ward,Tien Dao +1 more
TL;DR: In this article, a model for H2 permeation through Pd which accounts for external mass transfer, surface adsorption and desorption, transitions to and from the bulk metal, and diffusion within the metal was constructed.
References
More filters
Journal ArticleDOI
Development of a composite palladium membrane for selective hydrogen separation at high temperature
Rakesh Govind,Devendra Atnoor +1 more
TL;DR: In this article, a method is described for development of a composite palladium membrane for selective hydrogen separation at high temperature, which is used to form a thin palladium film on a silver porous substrate.
Journal ArticleDOI
Palladium-catalyzed oxidative diffusion for tritium extraction from breeder-blanket fluids at low concentrations
Cheazone Hsu,Robert E. Buxbaum +1 more
TL;DR: In this paper, the tritium holdup cost for the windows is 4.8 M$ and for the blanket it is proportional to the blanket volume and concentration, and overall costs are calculated for membranes of palladium-coated zirconium, niobium, vanadium, nickel and stainless-steel.
Journal ArticleDOI
Longitudinal coherence and interferometry in dispersive media
TL;DR: In this article, the coherence properties of a dispersively propagating beam of radiation were analyzed by means of a two-beam interferometer, and the observation of its spatial and temporal coherence was carried out with a single antenna.
Journal ArticleDOI
Use of zirconium-palladium windows for the separation of tritium from the liquid metal breeder-blanket of a fusion reactor
TL;DR: In this paper, the use of zirconium-palladium windows for tritium separation is shown to have many advantages over the best alternative devices, based on the materials properties and costs as they stand in 1983.
Journal ArticleDOI