Translational and Rotational Diffusion in Liquid Water at Very High Pressure: A Simulation Study

2019 ◽  
Vol 123 (47) ◽  
pp. 10025-10035 ◽  
Author(s):  
Pascale Friant-Michel ◽  
Jean-François Wax ◽  
Nadège Meyer ◽  
Hong Xu ◽  
Claude Millot
Keyword(s):  
High Pressure ◽  
Simulation Study ◽  
Liquid Water ◽  
Rotational Diffusion ◽  
Translational And Rotational Diffusion ◽  
Very High

scholarly journals Evidence for high-density liquid water between 0.1 and 0.3 GPa near 150 K

2019 ◽  
Vol 116 (19) ◽  
pp. 9191-9196 ◽  
Author(s):  
Josef N. Stern ◽  
Markus Seidl-Nigsch ◽  
Thomas Loerting
Keyword(s):  
Thermal Stability ◽  
High Pressure ◽  
Liquid Water ◽  
Crystallization Temperature ◽  
Amorphous Matrix ◽  
High Density ◽  
Amorphous Ice ◽  
Pressure Limit ◽  
Amorphous Ices ◽  
Very High

Thermal stability against crystallization upon isobaric heating at pressure 0.1 ≤ P ≤ 1.9 GPa is compared for five variants of high- (HDA) and very high-density amorphous ice (VHDA) with different preparation history. At 0.1–0.3 GPa expanded HDA (eHDA) and VHDA reach the same state before crystallization, which we infer to be the contested high-density liquid (HDL). Thus, 0.3 GPa sets the high-pressure limit for the possibility to observe HDL for timescales of minutes, hours, and longer. At P > 0.3 GPa the annealed amorphous ices no longer reach the same state before crystallization. Further examination of the results demonstrates that crystallization times are significantly affected both by the density of the amorphous matrix at the crystallization temperature Tx as well as by nanocrystalline domains remaining in unannealed HDA (uHDA) as a consequence of incomplete pressure-induced amorphization.

Anion packing density: a universal quantity for both dense and porous crystalline inorganic phases

2002 ◽  
Vol 58 (3) ◽  
pp. 457-462 ◽  
Author(s):  
F. Liebau ◽  
H. Küppers
Keyword(s):  
High Pressure ◽  
Packing Density ◽  
Three Dimensional ◽  
Ionic Radii ◽  
Generalized Framework ◽  
Molal Volumes ◽  
Definition Of ◽  
Anion Packing ◽  
Very High ◽  
Framework Density

To compare densities of inorganic high-pressure phases their molal volumes or specific gravities are usually employed, whereas for zeolites and other microporous materials the so-called framework density, FD, is applied. The definition of FD, which refers only to phases with three-dimensional tetrahedron frameworks, is extended to a `generalized framework density' d f, which is independent of the dimensionality of the framework and the coordination number(s) of the framework cations. In this paper the anion packing density, d ap, is introduced as a new quantity which is not only applicable to any inorganic phase but, in contrast to FD and d f, also allows quantitative comparisons to be made for crystalline inorganic phases of any kind. The anion packing density can readily be calculated if the volume and content of the unit cell and the radii of the anions of a phase are known. From d ap values calculated for high-pressure silica polymorphs studied under very high pressure, it is concluded that Shannon–Prewitt effective ionic radii do not sufficiently take into account the compressibility of the anions.

scholarly journals Gaseous combustion at high pressures. —Part X. The co-volume corrections, maximum temperatures and dissociation of steam and carbon dioxide in explosions

1928 ◽  
Vol 119 (782) ◽  
pp. 464-480
Keyword(s):  
Carbon Dioxide ◽  
High Pressure ◽  
Internal Energy ◽  
High Temperatures ◽  
High Pressures ◽  
Internal Combustion ◽  
Systematic Survey ◽  
Explosion Method ◽  
Maximum Temperatures ◽  
Very High

During the researches upon high-pressure explosions of carbonic oxide-air, hydrogen-air, etc., mixtures, which have been described in the previous papers of this series, a mass of data has been accumulated relating to the influence of density and temperature upon the internal energy of gases and the dissociation of steam and carbon dioxide. Some time ago, at Prof. Bone’s request, the author undertook a systematic survey of the data in question, and the present paper summarises some of the principal results thereof, which it is hoped will throw light upon problems interesting alike to chemists, physicists and internal-combustion engineers. The explosion method affords the only means known at present of determining the internal energies of gases at very high temperatures, and it has been used for this purpose for upwards of 50 years. Although by no means without difficulties, arising from uncertainties of some of the assumptions upon which it is based, yet, for want of a better, its results have been generally accepted as being at least provisionally valuable. Amongst the more recent investigations which have attracted attention in this connection should be mentioned those of Pier, Bjerrum, Siegel and Fenning, all of whom worked at low or medium pressures.

Experimental and simulation study on high-pressure V-L-S cryogenic hybrid network for CO2 capture from highly sour natural gas

2021 ◽  
Author(s):  
Khuram Maqsood ◽  
Abulhassan Ali ◽  
Rizwan Nasir ◽  
Aymn Abdul Rehman ◽  
Abdullah. S. Bin Mahfouz ◽  
...  
Keyword(s):  
High Pressure ◽  
Natural Gas ◽  
Co2 Capture ◽  
Simulation Study ◽  
Hybrid Network

scholarly journals Germination of vegetable seeds exposed to very high pressure

2012 ◽  
Vol 377 ◽  
pp. 012055 ◽  
Author(s):  
Y Mori ◽  
S Yokota ◽  
F Ono
Keyword(s):  
High Pressure ◽  
Very High

Very-High-Pressure Burning Rates of Aluminized and Nonaluminized AP/HTPB-Composite Propellants

2021 ◽  
pp. 1-8
Author(s):  
Catherine A. M. Dillier ◽  
Erica D. Petersen ◽  
Thomas Sammet ◽  
Eric L. Petersen
Keyword(s):  
High Pressure ◽  
Burning Rates ◽  
Very High

High-Tc Superconductors Under Very High Pressure

1991 ◽  
pp. 399-417
Author(s):  
Rinke J. Wijngaarden ◽  
J. J. Scholtz ◽  
E. N. van Eenige ◽  
R. Griessen
Keyword(s):  
High Pressure ◽  
High Tc Superconductors ◽  
High Tc ◽  
Very High
Sign in / Sign up

Export Citation Format

Share Document