Hydrate Phase Equilibria of Methane + TBAC + Water System in the Presence and Absence of NaCl and/or MgCl2

2020 ◽  
Vol 65 (9) ◽  
pp. 4684-4691 ◽  
Author(s):  
Mohammad Pourranjbar ◽  
Hassan Pahlavanzadeh ◽  
Ali Askari Zadeh Mahani ◽  
Amir H. Mohammadi
Keyword(s):  
Phase Equilibria ◽  
Water System ◽  
Hydrate Phase ◽  
Presence And Absence

Hydrate Phase Equilibria of the Carbon Dioxide, Methane, and Water System

2001 ◽  
Vol 46 (2) ◽  
pp. 381-384 ◽  
Author(s):  
Yu-Taek Seo ◽  
Huen Lee ◽  
Ji-Ho Yoon
Keyword(s):  
Carbon Dioxide ◽  
Phase Equilibria ◽  
Water System ◽  
Hydrate Phase

Hydrate Phase Equilibria of Methane + Mixed (TBAB + THF) in the Presence and Absence of NaCl and/or MgCl2 Aqueous Solutions

2019 ◽  
Vol 65 (1) ◽  
pp. 217-221 ◽  
Author(s):  
Hassan Pahlavanzadeh ◽  
Mohammad Pourranjbar ◽  
Ali Askari Zadeh Mahani ◽  
Amir H. Mohammadi
Keyword(s):  
Aqueous Solutions ◽  
Phase Equilibria ◽  
Hydrate Phase ◽  
Presence And Absence

Clathrate and other solid phases in the tetrahydrofuran–water system: thermal conductivity and heat capacity under pressure

1982 ◽  
Vol 60 (7) ◽  
pp. 881-892 ◽  
Author(s):  
Russell G. Ross ◽  
Per Andersson
Keyword(s):  
Thermal Conductivity ◽  
Heat Capacity ◽  
Water System ◽  
Clathrate Hydrate ◽  
Transient Hot Wire ◽  
Guest Molecules ◽  
Hydrate Phase ◽  
Wire Method ◽  
Solid Phases ◽  
Thermal Conductivity Λ

Solid phases in the tetrahydrofuran–water (THF–H2O) system were investigated in the temperature range 100–260 K and at pressures up to 1.5 GPa. Thermal conductivity, λ, and heat capacity per unit volume, ρcp, were measured, using the transient hot-wire method. We made measurements on solid phases having nominal compositions THF•17H2O, THF•7•1H2O, and THF•4•6H2O, which we refer to as phases α, β, and γ, respectively. Phase α is known to be a structure II clathrate hydrate, and λ for this phase was found to be similar to other crystalline solids which are glass-like in relation to their thermal properties. Low-energy excitations are known to be relevant to the properties of glass-like solids, and, in the case of phase α, were probably rotational vibrations of the THF guest molecules. Phase β was similar, and we inferred that it was probably a structure I clathrate hydrate. Phase γ behaved nearly like a normal crystal phase at low temperatures, but λ became almost independent of temperature near melting. At 1.1 GPa and 130 K, we found evidence that phase α transformed, on pressurization, to a metastable modification which may be a new high-density form of clathrate hydrate. The astrophysical implications of our results were mentioned briefly.

scholarly journals Structure and Phase Equilibria of the Soybean Lecithin/PEG 40 Monostearate/Water System

Langmuir ◽  
2013 ◽  
Vol 29 (47) ◽  
pp. 14369-14379 ◽  
Author(s):  
G. Montalvo ◽  
R. Pons ◽  
G. Zhang ◽  
M. Díaz ◽  
M. Valiente
Keyword(s):  
Phase Equilibria ◽  
Soybean Lecithin ◽  
Water System

Phase Equilibria in Hydrocarbon Systems. n-Butane-Water System in the Two-Phase Region.

1952 ◽  
Vol 44 (3) ◽  
pp. 609-615 ◽  
Author(s):  
H. H. Reamer ◽  
B. H. Sage ◽  
W. N. Lacey
Keyword(s):  
Phase Equilibria ◽  
Water System ◽  
Phase Region ◽  
Two Phase
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