Diffusive Motions of Molecular Hydrogen Confined in THF Clathrate Hydrate

2012 ◽  
Vol 116 (32) ◽  
pp. 16823-16829 ◽  
Author(s):  
E. Pefoute ◽  
E. Kemner ◽  
J. C. Soetens ◽  
M. Russina ◽  
A. Desmedt
Keyword(s):  
Molecular Hydrogen ◽  
Clathrate Hydrate

scholarly journals Does cage quantum delocalisation influence the translation–rotational bound states of molecular hydrogen in clathrate hydrate?

2018 ◽  
Vol 212 ◽  
pp. 533-546 ◽  
Author(s):  
David M. Benoit ◽  
David Lauvergnat ◽  
Yohann Scribano
Keyword(s):  
Molecular Hydrogen ◽  
Bound States ◽  
Clathrate Hydrate ◽  
Guest Molecules

In this study, we examine the effect of a flexible description of the clathrate hydrate framework on the translation–rotation (TR) eigenstates of guest molecules such as molecular hydrogen.

Water Cavities of sH Clathrate Hydrate Stabilized by Molecular Hydrogen

2008 ◽  
Vol 112 (7) ◽  
pp. 1885-1887 ◽  
Author(s):  
Timothy A. Strobel ◽  
Carolyn A. Koh ◽  
E. Dendy Sloan
Keyword(s):  
Molecular Hydrogen ◽  
Clathrate Hydrate

Water Cavities of sH Clathrate Hydrate Stabilized by Molecular Hydrogen:  Phase Equilibrium Measurements

2008 ◽  
Vol 112 (7) ◽  
pp. 1888-1889 ◽  
Author(s):  
Ana Rita C. Duarte ◽  
Alireza Shariati ◽  
Laura J. Rovetto ◽  
Cor J. Peters
Keyword(s):  
Phase Equilibrium ◽  
Molecular Hydrogen ◽  
Clathrate Hydrate

scholarly journals Quantum rattling of molecular hydrogen in clathrate hydrate nanocavities

2007 ◽  
Vol 76 (16) ◽  
Author(s):  
L. Ulivi ◽  
M. Celli ◽  
A. Giannasi ◽  
A. J. Ramirez-Cuesta ◽  
D. J. Bull ◽  
...  
Keyword(s):  
Molecular Hydrogen ◽  
Clathrate Hydrate

Interaction of H2O, O2 and H2 with Proton Conducting Oxides Based on Lanthanum Scandates

2019 ◽  
pp. 88-100
Author(s):  
A. S. Farlenkov ◽  
N. A. Zhuravlev ◽  
Т. A. Denisova ◽  
М. V. Ananyev
Keyword(s):  
Water Vapor ◽  
Partial Pressure ◽  
Gas Phase ◽  
Molecular Hydrogen ◽  
Proton Magnetic Resonance ◽  
Partial Pressure Of Oxygen ◽  
Proton Conducting ◽  
Conducting Oxides ◽  
Temperature Range ◽  
Apparent Level

The research uses the method of high-temperature thermogravimetric analysis to study the processes of interaction of the gas phase in the temperature range 300–950 °C in the partial pressure ranges of oxygen 8.1–50.7 kPa, water 6.1–24.3 kPa and hydrogen 4.1 kPa with La1–xSrxScO3–α oxides (x = 0; 0.04; 0.09). In the case of an increase in the partial pressure of water vapor at a constant partial pressure of oxygen (or hydrogen) in the gas phase, the apparent level of saturation of protons is shown to increase. An increase in the apparent level of saturation of protons of the sample also occurs with an increase in the partial pressure of oxygen at a constant partial pressure of water vapor in the gas phase. The paper discusses the causes of the observed processes. The research uses the hydrogen isotope exchange method with the equilibration of the isotope composition of the gas phase to study the incorporation of hydrogen into the structure of proton-conducting oxides based on strontium-doped lanthanum scandates. The concentrations of protons and deuterons were determined in the temperature range of 300–800 °C and a hydrogen pressure of 0.2 kPa for La0.91Sr0.09ScO3–α oxide. The paper discusses the role of oxygen vacancies in the process of incorporation of protons and deuterons from the atmosphere of molecular hydrogen into the structure of the proton conducting oxides La1–xSrxScO3–α (x = 0; 0.04; 0.09). The proton magnetic resonance method was used to study the local structure in the temperature range 23–110 °C at a rotation speed of 10 kHz (MAS) for La0.96Sr0.04ScO3–α oxide after thermogravimetric measurements in an atmosphere containing water vapor, and after exposures in molecular hydrogen atmosphere. The existence of proton defects incorporated into the volume of the investigated proton oxide from both the atmosphere containing water and the atmosphere containing molecular hydrogen is unambiguously shown. The paper considers the effect of the contributions of the volume and surface of La0.96Sr0.04ScO3–α oxide on the shape of the proton magnetic resonance spectra.

The Kinematics and Excitation of Molecular Hydrogen Emission in the Planetary Nebula BD +30o3639

1998 ◽  
Vol 498 (1) ◽  
pp. 267-277 ◽  
Author(s):  
D. L. Shupe ◽  
J. E. Larkin ◽  
R. A. Knop ◽  
L. Armus ◽  
K. Matthews ◽  
...  
Keyword(s):  
Planetary Nebula ◽  
Molecular Hydrogen ◽  
Hydrogen Emission
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