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Displaying 126 - 150 of 3839

Structural resolution and mechanistic insight into hydrogen adsorption in flexible ZIF-7

January 1, 2021
Author(s)
Ryan Klein, Sarah Shulda, Philip Parilla, Pierre Le Maqueres, Rachelle Richardson, William Morris, Craig Brown, C. Michael McGuirk
… frameworks offer a route towards high useable hydrogen storage capacities with minimal swings in pressure … and desorption profiles. Yet, the understanding of hydrogen-induced flexibility in candidate storage materials remains incomplete. Here, we investigate the hydrogen storage properties of a quintessential flexible …

Measurement of Hydrogen in Metal Alloys by Magnetic and Electronic Techniques

January 1, 2004
Author(s)
P. Termsuksawad, S. Niyomsoan, Ronald B. Goldfarb, V I. Kaydanov, David Olson, B. Mishra, Z Gavra
… and electronic measurements can be used to quantify hydrogen availability, absorption, and desorption in materials for nickel metal-hydride batteries and hydrogen storage. The ability of a metal alloy to absorb and desorb hydrogen depends on the interaction of the metal's electronic …

Fatigue Testing of Pipeline Welds and Heat-Affected Zones in Pressurized Hydrogen Gas

April 26, 2019
Author(s)
Elizabeth S. Drexler, Andrew J. Slifka, Robert L. Amaro, Jeffrey W. Sowards, Matthew J. Connolly, May L. Martin, Damian S. Lauria
… the fatigue crack growth rate (FCGR) in pressurized hydrogen gas and assess the area of the pipe that was most susceptible to fatigue when subjected to hydrogen gas. The relationship between FCGRs for welds and … stresses, differences in the actual path of the crack, and hydrogen pressure effects. …

High Pressure Release and Dispersion of Hydrogen in a Partially Enclosed Compartment : Effect of Natural and Forced Ventilation

September 2, 2013
Author(s)
Kuldeep R. Prasad, Thomas G. Cleary, Jiann C. Yang
… The study of compressed hydrogen release from high-pressure storage systems has practical application for hydrogen and fuel cell technologies. Such releases may occur … failure of a pressure release device (PRD). Understanding hydrogen behavior during and after the unintended release …

On the chemomechanics of bubble growth in hydrogen attack of plain carbon steels

May 2, 2025
Author(s)
May Martin, Kshitij Vijayvargia, T Nguyen, Mohsen Dadfarnia, Aleksandar Staykov, Petros Sofronis, Masanobu Kubota, John Pugh
… High temperature hydrogen attack (HTHA) is a form of degradation of carbon … steels exposed to high temperature and high-pressure hydrogen whereby internal hydrogen reacting with carbides forms methane gas bubbles … high temperature hydrogen attack, steel, modeling, damage …

Quasi-Elastic Neutron Scattering Studies of Hydrogen Dynamics for Nanoconfined NaAlH 4

July 14, 2016
Author(s)
Shathabish NaraseGowda, Craig Brown, Madhu Sudan Tyagi, Tabbetha A. Dobbins
… The hydrogen dynamics of nano-confined sodium alanate (NaAlH 4 ) … 4 indicates that there are two dynamic states of hydrogen which can be tracked by fitting the QENS signal to Lorentzian functions. The fastest hydrogen dynamics show some limited amount and range of long …

Fatigue measurement of pipeline steels for application of gaseous hydrogen transport

February 5, 2018
Author(s)
Andrew J. Slifka, Elizabeth S. Drexler, Robert L. Amaro, Louis E. Hayden, Damian S. Lauria, Nikolas W. Hrabe, Douglas G. Stalheim
… crack growth rate of pipeline steels in pressurized hydrogen gas was completed; the project was sponsored by the … in close collaboration with the ASME B31.12 Committee on Hydrogen Piping and Pipelines. Four steels were selected, two X52 and two X70 alloys. Other variables included hydrogen gas pressures of 5.5 MPa and 34 MPa, a load ratio, …

Monoammoniate of Calcium Amidoborane - Synthesis, Structure and Hydrogen-Storage Properties

January 9, 2012
Author(s)
Yong Shen Chua, Hui Wu, Wei Zhou, Terrence J. Udovic, Guotao Wu, Zhitao Xiong, Ming Wah Wong, Ping Chen
… by the decomposition of Ca(NH 2 BH 3 ) 2 to release hydrogen. In a closed-system thermal decomposition process, hydrogen is liberated in two stages, at ca. 70 °C and 180 °C, … of the dehydrogenation, ca. 6 equiv. (ca. 10.2 wt. %) of hydrogen can be released, giving rise to the formation of CaB …

Small-Pore Hydridic Frameworks Store Densely Packed Hydrogen

February 6, 2024
Author(s)
Hyunchul Oh, Nikolay Tumanov, Voraksmy Ban, Xiao Li, Bo Richter, Matthew Hudson, Craig Brown, Gail Iles, Dirk Wallacher, Scott Jorgensen, Luke Daemen, Rafael Balderas-Xicohtencatl, Yongqiang Cheng, Anibal Ramirez-Cuesta, Michael Heere, Sergio Posada-Perez, Geoffroy Hautier, Michael Hirscher, T. Jensen, Yaroslav Filinchuk
… and a partially negatively charged non-flat interior for hydrogen and nitrogen uptake. Hydrogen and nitrogen occupy distinctly different adsorption … capacities of 2.33 H2 and 0.66 N2 per Mg(BH4)2. Molecular hydrogen is packed extremely densely, with about twice the …

Charge States of y Ions in the Collision-Induced Dissociation of Doubly Charged Tryptic Peptide Ions

February 25, 2011
Author(s)
Pedatsur Neta, Stephen E. Stein
… relative intensities of charge states of product y- and b-ions depend on the final location of that proton. This study … distributions for dissociation of doubly charged peptide ions, using a large reference library of peptide ion fragmentation generated from ion-trap CID of peptide ions from tryptic digests. Trends in relative intensities of …

Mg-Fe Thin Films: A Phase-separated Structure with Fast Kinetics of Hydrogenation

September 20, 2012
Author(s)
Shiyou Zheng, Ke Wang, Vladimir Oleshko, Leonid A. Bendersky
… paper we suggest a new approach to improve the kinetics of hydrogenation based on a material with high density of … Pd were prepared by electron beam co-deposition and their hydrogenation/dehydrogenation kinetics and cycling properties … 413 K. The structures of the thin films before and after hydrogenation during different cycles were investigated by …

Metal Amidoboranes

September 1, 2011
Author(s)
Hui Wu, Wei Zhou, Taner Yildirim
… potential to meet the stringent gravimetric and volumetric hydrogen storage capacity targets needed for transportation … to AB, metal amidoboranes have been shown to release hydrogen at lower temperatures, and at higher rates and with … several metal amidoboarnes also appear to release hydrogen less exothermically than AB. In this chapter, we …

A Miniature EBIT with Ion Extraction for Isolating Highly Charged Ions

May 28, 2015
Author(s)
Shannon Hoogerheide, Joseph Tan
… development of a room-temperature miniature electron beam ion trap (EBIT) for efficient production of charge states … and electric potential necessary for the production of ions in the EBIT. In addition to radial access for in-EBIT … select a single charge state to be isolated in a secondary ion trap for further study. One goal is the production of …

A Compilation of Enthalpies of Formation for Hydrogen-Oxygen (HxOy) Species

March 11, 2016
Author(s)
Donald R. Burgess Jr.
… work, we have compiled enthalpies of formation for nine hydrogen-oxygen species (HxOy) and selected values for use. … Bond dissociation energies, Atomization energies, Hydrogen-oxygen species … A Compilation of Enthalpies of Formation for Hydrogen-Oxygen (HxOy) Species …

Operating Hydrogen Gas Transmission Pipelines at Pressures above 21 MPa

November 12, 2018
Author(s)
Andrew Slifka, Elizabeth S. Drexler, Robert L. Amaro, Peter Bradley, Damian Lauria
… The economical and efficient transportation of hydrogen gas is necessary for it to become a widespread … to improve the economics is to lower the cost of building hydrogen gas pipelines. The recent modification to the ASME B31.12 Code for Hydrogen Piping and Pipelines begins to lower the cost of …

Preparation and Certification of Hydrogen in Titanium Alloy Standard Reference Materials

August 4, 2012
Author(s)
Rick L. Paul, Richard M. Lindstrom
… A series of three Hydrogen in Titanium Alloy Standard Reference Materials (SRMs 2452, 2453, and 2454) were prepared with hydrogen mass fractions bracketing the hydrogen specification limit of 125 mg/kg. Commercial … titanium alloys, hydrogen, standard reference materials, activation analysis, …

FATIGUE CRACK GROWTH OF TWO PIPELINE STEELS IN A PRESSURIZED HYDROGEN ENVIRONMENT

October 22, 2013
Author(s)
Andrew J. Slifka, Elizabeth S. Drexler, Nicholas Nanninga, Yaakov Levy, Joseph D. McColskey, Robert L. Amaro
… results were compared with tests conducted in pressurized hydrogen gas. All tests were run at (load ratio) R = 0.5 and … one test on X100, run at 0.1 Hz. Tests were conducted at hydrogen pressures of 1.7 MPa, 7 MPa, 21 MPa, 48 MPa. Fatigue … X100 and X52 were significantly higher in a pressurized hydrogen environment than in air. This enhanced growth rate …

Performance Evaluation of High-Strength Steel Pipelines for High-Pressure Gaseous Hydrogen Transportation

April 1, 2013
Author(s)
Andrew J. Slifka, Elizabeth S. Drexler, Robert L. Amaro, Joseph D. McColskey, Yaoshan Chen, Ming Liu, Yong-Yi Wang
… of their mechanical properties in high-pressure gaseous hydrogen, including their fatigue cracking resistances to … were performed on X52 and X70 steels in both air and hydrogen gas pressurized to 5.5 MPa and 34 MPa. Experimental results indicate that the presence of gaseous hydrogen increases the FCGR of all materials tested. At lower …

Colorimetric Accuracies and Concerns in Spectroradiometry of LEDs

October 2, 1999
Author(s)
C Jones, Yoshi Ohno
LEDs are narrow-band emission sources and present special problems in colorimetric characterization. Chromaticity space is mapped using Gaussian spectral models to represent narrow-band emission sources. The Gaussian maps show that the spectral regions are

Neutron Scattering Studies of Materials for Hydrogen Storage

August 28, 2021
Author(s)
Ryan Klein, Hayden Evans, Benjamin Trump, Terrence J. Udovic, Craig Brown
… Hydrogen storage presents a significant barrier to the widespread adaptation of hydrogen as an energy source in mobile and stationary applications. The development of new candidate hydrogen storage materials is therefore an outstanding goal … hydrogen storage, neutron diffraction, inelastic neutron …
Displaying 126 - 150 of 3839
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