Driving force and composition for multicomponent gas hydrate nucleation from supersaturated aqueous solutions

2004 ◽  
Vol 121 (23) ◽  
pp. 11867-11875 ◽  
Author(s):  
Mark R. Anklam ◽  
Abbas Firoozabadi
Keyword(s):  
Aqueous Solutions ◽  
Gas Hydrate ◽  
Driving Force ◽  
Multicomponent Gas

Multicomponent Gas Hydrate Nucleation: The Effect of the Cooling Rate and Composition

2011 ◽  
Vol 25 (1) ◽  
pp. 42-51 ◽  
Author(s):  
Hailu K. Abay ◽  
Thor M. Svartaas
Keyword(s):  
Cooling Rate ◽  
Gas Hydrate ◽  
Multicomponent Gas

Bromine chloride clathrate gas hydrate

1969 ◽  
Vol 47 (24) ◽  
pp. 4651-4654 ◽  
Author(s):  
D. N. Glew ◽  
D. A. Hames
Keyword(s):  
Aqueous Solution ◽  
Aqueous Solutions ◽  
Gas Hydrate ◽  
Enthalpy Of Fusion ◽  
Bromine Chloride ◽  
Chloride Hydrate

Bromine chloride hydrate, prepared free of excess halogen, has been analyzed directly to give the formula BrCl•7.77 ± 1.58 H2O. The halogen is found to be bromine-rich in the hydrate and bromine-deficient in the aqueous solution at 5 °C. Aqueous solutions in equilibrium with the hydrate between 1 and 15 °C have been analyzed and yield the bromine chloride hydrate enthalpy of fusion 10 450 ± 860 cal/mole which leads to the formula BrCl•7.28 ± 0.60 H2O. It is concluded that bromine chloride forms a normal clathrate-type gas hydrate of formula BrCl•7.34 H2O, and that the frequently quoted formula BrCl•4 H2O is wrong.

Research Progress on the Driving Force of Gas Hydrate Formation

2012 ◽  
Vol 616-618 ◽  
pp. 902-906 ◽  
Author(s):  
Chun Long Wang ◽  
Xue Min Zhang ◽  
Jin Ping Li ◽  
Lin Jun Wang ◽  
Liang Jiao
Keyword(s):  
Growth Rate ◽  
Gas Hydrate ◽  
Induction Time ◽  
Driving Force ◽  
Hydrate Formation ◽  
Research Direction ◽  
Research Progress ◽  
Force Model ◽  
Hydration Reaction ◽  
Gas Hydrate Formation

Predicting the driving force accurately is the key process to hydrate nucleating and growing of hydration reaction. The nucleating and growing process of hydrate is relevant to temperature, pressure and component of reactant, and the property of reaction tank and intermiscibility of reactant have notable effect on the formation process of hydrate with its nucleating position, the induction time, growth rate and hydration rate. However, the present driving force model of hydrate cannot predict nucleating area, induction time, growth rate and the reaction limit, and also can't explain the influence of some factors such as cooling rate, temperature disturbance and inlet way on the hydration reaction, it is uncertain of the process to gas hydrate nucleation. We introduced some driving force models, analyzed their merits and demerits, and looked into the distance of research direction to driving force in the future.

scholarly journals Application of the Cell Potential Method To Predict Phase Equilibria of Multicomponent Gas Hydrate Systems

2005 ◽  
Vol 109 (16) ◽  
pp. 8153-8163 ◽  
Author(s):  
Brian J. Anderson ◽  
Martin Z. Bazant ◽  
Jefferson W. Tester ◽  
Bernhardt L. Trout
Keyword(s):  
Phase Equilibria ◽  
Gas Hydrate ◽  
Potential Method ◽  
Cell Potential ◽  
Multicomponent Gas

Thermodynamic Stability of H2+ Tetrahydrofuran Mixed Gas Hydrate in Nonstoichiometric Aqueous Solutions

2007 ◽  
Vol 52 (2) ◽  
pp. 517-520 ◽  
Author(s):  
Shunsuke Hashimoto ◽  
Takeshi Sugahara ◽  
Hiroshi Sato ◽  
Kazunari Ohgaki
Keyword(s):  
Aqueous Solutions ◽  
Thermodynamic Stability ◽  
Gas Hydrate ◽  
Mixed Gas

scholarly journals Thermodynamics of binary and ternary complexes of 3-amino-1, 2, 4-triazole and aminoacids with Ni(II) and Co(II) metal ions

2005 ◽  
Vol 70 (8-9) ◽  
pp. 1057-1066 ◽  
Author(s):  
Ayse Erçag ◽  
Tuba Sismanoglu ◽  
Suheyla Pura
Keyword(s):  
Ionic Strength ◽  
Aqueous Solutions ◽  
Glutamic Acid ◽  
Driving Force ◽  
Ternary Complex ◽  
Ternary Complexes ◽  
Binary And Ternary Complexes ◽  
Enthalpy Changes ◽  
Binary Complexes ◽  
The Stability

The stability constants of the 1:1 binary complexes of Ni(II) and Co(II) with 3-amino-1,2,4-triazole (AT), leucine (Leu) and glutamic acid (Glu), and the 1:1:1 ternary complex of them and the protonation constants of the ligands were determined potentiometrically at a constant ionic strength of I = 0.10 mol L-1 (NaClO4) in aqueous solutions at 15.0 and 25.0 ?C. The thermodynamic parameters ?Gf0, ?Hf0 and ?Sf0 are reported for the formation reactions of the complexes. The enthalpy changes of all the complexations were found to be negative but the entropy changes positive. While the driving force for the formation of the Ni(II), Co(II) ? AT complexes is the enthalpy decrease, the driving force for the ternary complexes of AT is the entropy increase.

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