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Displaying 126 - 150 of 1646

Strain-life performance in hydrogen of DOT pressure vessel steel

November 7, 2022
Author(s)
May Ling Martin, Peter Bradley, Damian Lauria, Robert L. Amaro, Matthew Connolly, Andrew Slifka
… steel was conducted in air and in a high-pressure gaseous-hydrogen environment. Hydrogen causes an order of magnitude decrease in lifetime … the same strain-amplitudes. This decrease in lifetime in hydrogen is accompanied by various effects, such as a shift … hydrogen, fatigue, strain-life, damage …

Standardized Equation for Hydrogen Gas Densities for Fuel Consumption Applications

April 3, 2006
Author(s)
Eric Lemmon, Marcia L. Huber, Daniel G. Friend, Carl Paulina
… methods for evaluating the consumption of gaseous hydrogen fuel in vehicle applications involves the … fixed, volume. This method requires the density of hydrogen. A current standard for the thermodynamic properties of hydrogen is provided by a 32-term equation of state, in which …

Humidity Standard of Compressed Hydrogen for Fuel Cell Technology

May 2, 2008
Author(s)
Peter H. Huang
… Compressed hydrogen is one of the most important utilities in fuel cell industry. For the specification of hydrogen fuel quality and for the design of humidification … equipment, knowledge of the equilibrium water content of hydrogen as a function of temperature and pressure is …

Hydrogen Spillover Effect of Pt-Doped Activated Carbon Studied by Inelastic Neutron Scattering

August 24, 2011
Author(s)
Cheng-Si Tsao, Yun Liu, Haw-Yeu Chuang, Huan-Hsiung Tseng, Tsan-Yao Chen, Chien-Hung Chen, Ming-Sheng Yu, Qixiu Li, Angela Lueking, Sow-Hsin Chen
… (INS) method to directly monitor the change of molecular hydrogen in the Pt-doped activated carbon (Pt/AC) samples and provide very conclusive evidence that significant hydrogen atoms can diffuse to the carbon surface at room … method is uniquely capable of revealing the state of the hydrogen (either atomic or molecular forms). The INS result …

Fatigue crack growth rates of API X70 pipeline steel in a pressurized hydrogen gas environment

December 21, 2013
Author(s)
Elizabeth S. Drexler, Andrew J. Slifka, Robert L. Amaro, Nicholas Barbosa, Damian S. Lauria, Louis E. Hayden, Douglas G. Stalheim
… Hydrogen is known to have a deleterious effect on metal, but … still be the most cost- effective means of transporting hydrogen gas and sour gas. Rather, it is the codes and … the design of pipelines and account for the effect of hydrogen. It has been shown repeatedly that the strength of …

Fundamental Equations of State for Parahydrogen, Normal Hydrogen, and Orthohydrogen

September 4, 2009
Author(s)
Jacob W. Leachman, Bryce Jacobson, Steven Penoncello, Eric Lemmon
… If the potential for a boom in the global hydrogen economy is realized, there will be an increase in the need for accurate hydrogen thermodynamic property standards. Based on current … fundamental equations of state for parahydrogen, normal hydrogen, and orthohydrogen were developed to replace the …

Evidence of Molecular Hydrogen Trapped in Two-Dimensional Layered Titanium Carbide-Based MXene

July 17, 2017
Author(s)
Naresh C. Osti, Michael Naguib, Madhu Sudan Tyagi, Yury Gogotsi, Alexander I. Kolesnikov, Eugene Mamontov
… The presence of molecular hydrogen at ambient conditions in a MXene (Ti 3 C 2 T x )) … meV, providing a clear indication of the presence of para hydrogen in the MXene synthesized using 48% HF and annealed … the peak width due to the mobility of the molecular hydrogen in confinement. The presence of molecular hydrogen …

Antibacterial amorphous calcium phosphate nanocomposite with quaternary ammonium salt and silver nanoparticles

February 2, 2012
Author(s)
Nancy Lin, Lei Cheng, Michael D. Weir, Hockin H. Xu, Joseph M. Antonucci, Alison M. Kraigsley, Sheng Lin-Gibson, Xuedong Zhou
… Objectives. Calcium and phosphate ion-releasing resin composites are promising for … and silver nanoparticles (NanoAg) into amorphous calcium phosphate nanocomposite (NanoACP) for the first time to … QADM and NanoAg were incorporated into calcium phosphate composite for the first time. NanoACP+QADM+NanoAg …

A Clock Ensemble Using Only Active Hydrogen Masers

January 31, 2017
Author(s)
Thomas E. Parker, Stefania Romisch
… as well as the post-processed scale TP162, both contain hydrogen masers and commercial cesium frequency standards. … standards are much nosier in the short term than the hydrogen masers and consequently have very little short-term … on the clock ensemble at NIST. In the first case both hydrogen masers and cesium standards were used, and in the …

Unification of hydrogen-enhanced damage understanding through Strain-Life Experiments and Modeling

June 20, 2019
Author(s)
May L. Martin, Christopher P. Looney, Peter E. Bradley, Damian S. Lauria, Robert L. Amaro, Andrew J. Slifka
… testing of a 4130 pressure vessel steel was conducted in hydrogen gas through the careful adaptation of an existing hydrogen-gas mechanical testing apparatus. The strain-life mechanical results reveal that hydrogen has a significant effect on the strain-life, and …

Economic impact of applying high strength steels in hydrogen gas pipelines

June 17, 2015
Author(s)
Jeffrey W. Sowards, James R. Fekete, Robert L. Amaro
… will likely be employed extensively to transport gaseous hydrogen in support of a future clean energy economy. To date, a hydrogen-specific cost analysis of pipeline installation has … in order to quantify cost differentials associated with hydrogen pipeline installation relative to (a) natural gas …

Metallo-N-Heterocycles - A New Family of Hydrogen Storage Material

April 1, 2020
Author(s)
Khai Chen Tan, Yang Yu, Ruting Chen, Teng He, Zijun Jing, Qijun Pei, Jintao Wang, Yong Shen Chua, Anan Wu, Wei Zhou, Hui Wu, Ping Chen
… Storing hydrogen efficiently in condensed material under mild … technique challenge. Here, we developed a new family of hydrogen storage material spanning across the domain of … alkline earth metals to tune the thermodynamic property of hydrogen storage. Theoretical calculations reveal that the …

HYDROGEN PIPELINE RESEARCH AT NIST

March 31, 2008
Author(s)
Thomas A. Siewert, Joseph D. McColskey, Angelique N. Lasseigne
… greatly expanded its efforts in support of the use of hydrogen as a fuel.   Various NIST divisions have started … (Materials Reliability) has focused on the issues with hydrogen embrittlement of conventional pipeline and storage … hydrogen, mechanical testing, permeation, pipelines, test …

Equilibrium Structure of Hydrogen-Bonded Polymer Blends

November 1, 1998
Author(s)
C Zhou, Erik K. Hobbie, Barry J. Bauer, Charles C. Han
… neutron scattering (SANS). Miscibility is induced via hydrogen bonding between the DPS (OH) hydroxyl group and PBMA … attribute to the short-range site specific nature of the hydrogen bond interaction. … hydrogen bond, polymer blend, SANS … Equilibrium Structure of Hydrogen-Bonded Polymer Blends …

Hydrogen Embrittlement Susceptibility and Fracture Toughness Measurements of Welded X65M Pipeline Steels

November 14, 2024
Author(s)
Newell Moser, Zack Buck, Nicholas Derimow, May Ling Martin, Damian Lauria, Enrico Lucon, Peter Bradley, Matthew Connolly
… Hydrogen is known to deteriorate the mechanical performance of steels (i.e., hydrogen embrittlement). The welding processes involved in … contacts to assess the susceptibility of seam welds to hydrogen embrittlement; these three pipes are made from API … hydrogen, weld, fracture, piping …

Thermodynamics of the Hydrolysis Reactions of Adenosine 3', 5'-(Cyclic)phosphate(aq) and Phosphoenolpyruvate(aq); the Standard Molar Formation Properties of 3',5'-(Cyclic)Phosphate(aq) and Phosphoenolpyruvate(aq)

November 1, 2003
Author(s)
Robert N. Goldberg, Yadu D. Tewari
… were catalyzed, respectively, by adenosine 3',5'-(cyclic)phosphate and by alkaline phosphatase. The results were … = ADP(aq) + PEP(aq)}, and {ATP(aq) + pyruvate(aq) + phosphate(aq) = AMP(aq) + PEP(aq) + pyrophosphate(aq)} were … adenosine 3', 5'-cyclic)phosphate, Alkaline phosphatase, calorimetry, chemical …

Development of a combinatorial characterization scheme for high-throughput investigations of hydrogen storage materials.

December 16, 2011
Author(s)
Jason Hattrick-Simpers, Z. Tan, H. Oguchi, Chun Chiu, Edwin J. Heilweil, James E. Maslar, Leonid A. Bendersky
… reliably increase the throughput of materials measured for hydrogen storage properties, a complete high-throughput … scheme has been developed that accurately measures the hydrogen storage properties of materials in quantities … wedge samples using normalized IR emissivity imaging. The hydrogen storage properties of promising samples are …

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 …

Extensive hydrogen incorporation is not necessary for superconductivity in topotactically reduced nickelates

August 27, 2024
Author(s)
Purnima P. Balakrishnan, Dan F. Segedin, Lin E. Chow, P. Quarterman, Shinichiro N. Muramoto, Mythili Surendran, Ranjan K. Patel, Harrison LaBollita, Grace A. Pan, Qi Song, Yang Zhang, Ismail El Baggari, Koushik Jagadish, Yu-Tsun Shao, Berit H. Goodge, Lena F. Kourkoutis, Srimanta Middey, Antia S. Botana, Jayakanth Ravichandran, A. Ariando, Julia Mundy, Alexander Grutter
… layered superconducting nickelate films is the role that hydrogen incorporation into the lattice plays in the … have introduced the possibility that the incorporation of hydrogen from the reducing agent into the nickelate lattice … (Nd,Sr)NiO2 / SrTiO3. We find no evidence for extensive hydrogen incorporation across a broad range of samples, …

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 …
Displaying 126 - 150 of 1646
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