Results 11 to 20 of about 1,158,756 (302)

A mathematical framework for modelling and evaluating natural gas pipeline networks under hydrogen injection [PDF]

, 2008
This article presents the framework of a mathematical formulation for modelling and evaluating natural gas pipeline networks under hydrogen injection. The model development is based on gas transport through pipelines and compressors which compensate for ...
Azzaro-Pantel, Catherine, Domenech, Serge, Pibouleau, Luc, Tabkhi, Firooz   +3 more
core   +1 more source

Molecular Hydrogen in Natural Mayenite [PDF]

Minerals, 2020
In the last 15 years, zeolite-like mayenite, Ca12Al14O33, has attracted significant attention in material science for its variety of potential applications and for its simple composition. Hydrogen plays a key role in processes of electride material synthesis from pristine mayenite: {Ca12Al14O32}2+(O2) → {Ca12Al14O32}2+(e−)2.
Evgeny Galuskin, Irina Galuskina, Yevgeny Vapnik, Mikhail Murashko   +3 more
openaire   +3 more sources

A Natural Choice for Activating Hydrogen

Science, 2008
The structure of a novel hydrogenase enzyme provides insights into how molecular hydrogen can be activated for use in biological processes.
Armstrong, F, Fontecilla-Camps, J
openaire   +4 more sources

Reassessing the role of magnetite during natural hydrogen generation

Frontiers in Earth Science, 2023
Interactions between water and ferrous rocks are known to generate natural H2 in oceanic and continental domains via the oxidation of iron. Such generation has been mainly investigated through the alteration of Fe2+-silicate and some Fe2+-carbonates.
Ugo Geymond, Ugo Geymond, Théo Briolet, Théo Briolet, Valentine Combaudon, Valentine Combaudon, Olivier Sissmann, Isabelle Martinez, Mathieu Duttine, Isabelle Moretti   +9 more
doaj   +1 more source

Characterization technique of gases permeation properties in polymers: H2, He, N2 and Ar gas

Scientific Reports, 2022
We demonstrate a simple experimental technology for characterizing the gas permeation properties of H2, He, N2 and Ar absorbed in polymers. This is based on the volumetric measurement of released gas and an upgraded diffusion analysis program after high ...
Jae Kap Jung, Ji Hun Lee, Jin Sub Jang, Nak Kwan Chung, Chang Young Park, Un Bong Baek, Seung Hoon Nahm   +6 more
doaj   +1 more source

Asymmetry of the natural line profile for the hydrogen atom [PDF]

, 2001
The asymmetry of the natural line profile for transitions in hydrogen-like atoms is evaluated within a QED framework. For the Lyman-alpha $1s-2p$ absorption transition in neutral hydrogen this asymmetry results in an additional energy shift of 2.929856 ...
D. A. Solovyev, E. V. Hagley, F. Low, G. Plunien, G. Soff, K. Pachucki, K. Pachucki, L. Labzowsky, L. Labzowsky, L. Labzowsky, L. N. Labzowsky, L. N. Labzowsky, L. N. Labzowsky, L. N. Labzowsky, L. P. Rapoport, M. I. Eides, M. I. Eides, M. I. Eides, M. I. Eides, M. Niering, S. G. Karshenboim, S. G. Karshenboim, U. D. Jentschura, U. D. Jentschura, V. A. Yerokhin, V. V. Karasiev, V. Weisskopf   +26 more
core   +2 more sources

The Origin and Occurrence of Natural Hydrogen

Energies, 2023
Hydrogen is an attractive, clean, sustainable energy source primarily produced via industry. At present, most reviews on hydrogen mainly focus on the preparation and storage of hydrogen, while the development and utilization of natural hydrogen will ...
Lu Wang, Zhijun Jin, Xiao Chen, Yutong Su, Xiaowei Huang   +4 more
doaj   +1 more source

Gravity modes as a way to distinguish between hydrogen- and helium-burning red giant stars [PDF]

, 2011
Red giants are evolved stars that have exhausted the supply of hydrogen in their cores and instead burn hydrogen in a surrounding shell. Once a red giant is sufficiently evolved, the helium in the core also undergoes fusion.
A Miglio, A Miglio, A Pietrinferni, Andrea Miglio, Anne-Marie Broomhall, Arlette Noels, AV Sweigart, B Mosser, B Mosser, Benoit Mosser, C Aerts, C Charbonnel, Caroline Barban, Conny Aerts, D Huber, Daniel Huber, Dennis Stello, Derek L. Buzasi, DO Gough, Fabien Carrier, H Kjeldsen, H Kjeldsen, Hans Kjeldsen, I Iben Jr, J Christensen-Dalsgaard, J Christensen-Dalsgaard, J De Ridder, J Montalbán, JM Jenkins, Jon M. Jenkins, Joris De Ridder, Josefina Montalbán, Jørgen Christensen-Dalsgaard, Kevin Belkacem, L Girardi, M Aizenman, M Dupret, M Schwarzschild, M Tassoul, Marc-Antoine Dupret, Maria Pia Di Mauro, Marie-Jo Goupil, P Ventura, Paolo Ventura, Paul Beck, Rafael A. García, Ronald L. Gilliland, S Deheuvels, Saskia Hekker, Savita Mathur, Steven Kawaler, Søren Frandsen, T Kallinger, Thomas Kallinger, Timothy M. Brown, Timothy R. Bedding, Timothy R. White, TR Bedding, Victor Silva Aguirre, WA Dziembowski, William J. Chaplin, Yvonne P. Elsworth   +61 more
core   +10 more sources

Experimental study on a metal hydride based hydrogen compressor [PDF]

, 2009
This is the post-print version of the final paper published in Journal of Alloys and Compounds. The published article is available from the link below. Changes resulting from the publishing process, such as peer review, editing, corrections, structural ...
Askri, Bowman, Bowman, Da Silva, Dehouche, Dehouche, F. Laurencelle, F. Morin, Feng, Friedlmeier, J. Goyette, Lambert, Laurencelle, Laurencelle, Mayer, Nishimura, Rodríguez Sánchez, Z. Dehouche   +17 more
core   +1 more source

An Attempt to Study Natural H₂ Resources across an Oceanic Ridge Penetrating a Continent: The Asal–Ghoubbet Rift (Republic of Djibouti)

Geosciences, 2021
Dihydrogen (H2) is generated by fluid–rock interactions along mid-ocean ridges (MORs) and was not, until recently, considered as a resource. However, in the context of worldwide efforts to decarbonize the energy mix, clean hydrogen is now highly sought ...
Gabriel Pasquet, Rokiya Houssein Hassan, Olivier Sissmann, Jacques Varet, Isabelle Moretti   +4 more
doaj   +1 more source