Hydrogen Permeation through Incoloy-800

Molecular simulations of hydrogen andmethane permeation through poremouthmodified zeolite membranes

Membrane-based separations are an attractive means to separate hydrogen from gas mixtures in order to use hydrogen in energy-related applications. Zeolite membranes are robust materials that are well suited to be used in harsh conditions, but they are not typically selective for hydrogen. Several studies have shown that highly selective separations of hydrogen are possible using zeolite membran...

Permeation through cornea.

The permeability of the cornea to drugs is clinically important because it is the major factor determining the efficacy of topically applied ophthalmic preparations. With this perspective, the present article gives a brief update and overview of corneal structure and proposed mechanisms of permeation. Physiological, physicochemical and formulation factors affecting drug permeation through corne...

Bi-Directional Hydrogen Isotopes Permeation through the First Wall of a Magnetic Fusion Power Reactor

Plasma-driven permeation (PDP) and gas-driven permeation (GDP) through a first wall candidate material F82H have been investigated using a laboratory-scale steady state plasma facility. Experiments indicate that GDP may take place in the opposite direction of PDP, which then results in an unwanted increase in edge plasma density. A hydrogen flow from the plasma side to the gas side has also bee...

Modeling hydrogen permeation through a thin titanium oxide film and palladium

Gas Permeation Modeling through a Multilayer Hollow Fiber Composite Membrane

In this study, a time-dependent 2D axisymmetric model of a multilayer hollow fiber composite membrane for gas separation is proposed. In spite of the common multilayer membranes, which a dense layer coated on a porous support layer and subjected into the feed stream, here, the porous support is exposed to the feed gas. In this regard, the governing equations of species transport are developed f...