Thermodynamic modeling of phase equilibrium of carbon dioxide clathrate hydrate in aqueous solutions of promoters and inhibitors suitable for gas separation

2017 ◽  
Vol 12 (5) ◽  
pp. 709-722 ◽  
Author(s):  
Venkata Ramana Avula ◽  
Pawan Gupta ◽  
Ramesh L. Gardas ◽  
Jitendra S. Sangwai
Keyword(s):  
Carbon Dioxide ◽  
Phase Equilibrium ◽  
Aqueous Solutions ◽  
Gas Separation ◽  
Thermodynamic Modeling ◽  
Clathrate Hydrate

Solubility of oleic acid, triacylglycerol and their mixtures in supercritical carbon dioxide and thermodynamic modeling of phase equilibrium

2019 ◽  
Vol 143 ◽  
pp. 275-285
Author(s):  
Tábata T. Garmus ◽  
Natasha Aires de Oliveira Giani ◽  
Walter A. Rammazzina Filho ◽  
Carmen L. Queiroga ◽  
Fernando A. Cabral
Keyword(s):  
Carbon Dioxide ◽  
Oleic Acid ◽  
Phase Equilibrium ◽  
Supercritical Carbon Dioxide ◽  
Thermodynamic Modeling ◽  
Supercritical Carbon

scholarly journals Semi-clathrate hydrate phase stability conditions for methane + TetraButylAmmonium Bromide (TBAB)/TetraButylAmmonium Acetate (TBAA) + water system: Experimental measurements and thermodynamic modeling

2021 ◽  
Vol 76 ◽  
pp. 75
Author(s):  
Hamideh Irannezhad ◽  
Jafar Javanmardi ◽  
Ali Rasoolzadeh ◽  
Khayyam Mehrabi ◽  
Amir H. Mohammadi
Keyword(s):  
Phase Equilibrium ◽  
Aqueous Solutions ◽  
Mass Fraction ◽  
Tetrabutylammonium Bromide ◽  
Clathrate Hydrate ◽  
Clathrate Hydrates ◽  
Stability Conditions ◽  
Equilibrium Conditions ◽  
Hydrate Phase ◽  
Mass Fractions

One of the promising applications of clathrate/gas hydrates is the transport and storage of natural gas. Semi-clathrate hydrates have received more attention due to milder pressure/temperature stability conditions compared to ordinary clathrate hydrates. The most commonly reported semi-clathrate hydrates are formed from a combination of gas + water + quaternary ammonium salts. In this work, a total of 53 equilibrium data for semi-clathrate hydrates of methane + TetraButylAmmonium Bromide (TBAB)/TetraButylAmmonium Acetate (TBAA) aqueous solutions were experimentally measured. For TBAB, three concentrations including 0.0350, 0.0490, and 0.1500 mass fractions were used. For TBAA, a solution with a 0.0990 mass fraction was used. Additionally, the modified Chen–Guo model was applied to calculate the hydrate phase equilibrium conditions of methane + TBAB/TBAA aqueous solutions. The model can accurately calculate the aforementioned semi-clathrate hydrate phase equilibrium conditions with the Average Absolute Deviations ((AAD)T and (AAD)P) of 0.1 K and 0.08 MPa, respectively. The temperature increments for 0.0350, 0.0490, and 0.1500 mass fractions of TBAB are 7.7, 9.4, and 13.5 K, respectively. This value for 0.0990 mass fraction of TBAA is 6.2 K. Therefore, it is concluded that TBAB is a stronger hydrate promoter compared to TBAA.

Solubility of Flue Gas or Carbon Dioxide-Nitrogen Gas Mixtures in Water and Aqueous Solutions of Salts: Experimental Measurement and Thermodynamic Modeling

2019 ◽  
Vol 58 (8) ◽  
pp. 3377-3394 ◽  
Author(s):  
Aliakbar Hassanpouryouzband ◽  
Mehrdad Vasheghani Farahani ◽  
Jinhai Yang ◽  
Bahman Tohidi ◽  
Evgeny Chuvilin ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Aqueous Solutions ◽  
Thermodynamic Modeling ◽  
Experimental Measurement ◽  
Flue Gas ◽  
Gas Mixtures ◽  
Nitrogen Gas
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