The diffusivity of hydrogen in cold-rolled pure iron is investigated using permeation and desorption methods. Electrochemical charging, electro-permeation thermal spectroscopy (TDS) experiments are conducted. Firstly, the relation between charging current concentration established. Secondly, conducted at 22, 40 67 °C to quantify dependence on temperature. Finally, estimated by two types Fick’s ...

Abstract Hydrogen embrittlement (HE) of advanced high-strength steels is a crucial problem in the automotive industry, which may cause time-delayed failure car body components. Practical approaches for evaluating HE risk are often partially and contradictive nature, because hydrogen desorption during testing inhomogenous distributions in, e.g., notched samples. Therefore, present work aims to p...

in this study the catalytic dehydrogenation of ethylbenzene to styrene was investigated in a simulated tubular sodalite membrane reactor. the high quality microporous sodalite membrane was synthesized by direct hydrothermal method and characterized by single gas permeation measurements. the performance of the prepared membrane showed high potential for application in a dehydrogenation membrane ...

The Front Cover shows how in the NH3 synthesis via a hydrogen-permeable electrode N, H species on catalyst surface can be controlled, using analogy of traffic controller. In this work, authors investigated effect temperature and permeation flux process. Increasing operating improves activity, efficiency stability, thanks to enhanced nitrogen adsorption desorption. Stable efficient reduction rea...

Liquid hydrogen (LH2) takes up less storage volume than gas but requires cryogenic vessels. State-of-the-art applications for passenger vehicles consist of double-wall cylindrical tanks that hold a hydrogen storage mass of up to 10 kg. The preferred shell material of the tanks is stainless steel, since it is very resistant against hydrogen brittleness and shows negligible hydrogen permeation. T...

Escherichia coli lactose permease (LacY) transports sugar across the inner membrane of the bacterium using the proton motive force to accumulate sugar in the cytosol. We have probed lactose conduction across LacY using steered molecular dynamics, permitting us to follow molecular and energetic details of lactose interaction with the lumen of LacY during its permeation. Lactose induces a widenin...

Hydrogen permeation membranes are a key element in improving the energy conversion efficiency and decreasing the greenhouse gas emissions from energy generation. The scientific community faces the challenge of identifying and optimizing stable and effective ceramic materials for H2 separation membranes at elevated temperature (400-800 °C) for industrial separations and intensified catalytic rea...