An efficient model for the prediction of CO2 hydrate phase stability conditions in the presence of inhibitors and their mixtures

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.

Download Full-text

Methane hydrate phase stability with lower mole fractions of tetrahydrofuran (THF) and tert-butylamine (t-BuNH2)

Fluid Phase Equilibria ◽

10.1016/j.fluid.2011.11.012 ◽

2012 ◽

Vol 315 ◽

pp. 126-130 ◽

Cited By ~ 21

Author(s):

Vangala Dhanunjana Chari ◽

Deepala V.S.G.K. Sharma ◽

Pinnelli S.R. Prasad

Keyword(s):

Phase Stability ◽

Methane Hydrate ◽

Hydrate Phase ◽

Tert Butylamine

Download Full-text

Phase stability conditions of carbon dioxide and methane clathrate hydrates in the presence of KBr, CaBr 2 , MgCl 2 , HCOONa, and HCOOK aqueous solutions: Experimental measurements and thermodynamic modelling

The Journal of Chemical Thermodynamics ◽

10.1016/j.jct.2017.07.030 ◽

2017 ◽

Vol 115 ◽

pp. 307-317 ◽

Cited By ~ 9

Author(s):

Arash Kamari ◽

Hamed Hashemi ◽

Saeideh Babaee ◽

Amir H. Mohammadi ◽

Deresh Ramjugernath

Keyword(s):

Carbon Dioxide ◽

Aqueous Solutions ◽

Phase Stability ◽

Thermodynamic Modelling ◽

Clathrate Hydrates ◽

Stability Conditions ◽

Experimental Measurements ◽

Methane Clathrate

Download Full-text

An efficient model for the prediction of CO2 hydrate phase stability conditions in the presence of inhibitors and their mixtures

A thermodynamic framework for modeling semiclathrate hydrate phase stability conditions in gas + tetra-n-butyl ammonium halide aqueous solution system

Phase stability conditions for clathrate hydrate formation in (fluorinated refrigerant + water + single and mixed electrolytes + cyclopentane) systems: Experimental measurements and thermodynamic modelling

Phase Stability Conditions for Clathrate Hydrates Formation in CO2 + (NaCl or CaCl2 or MgCl2) + Cyclopentane + Water Systems: Experimental Measurements and Thermodynamic Modeling

Phase stability conditions of clathrate hydrates for methane+aqueous solution of water soluble organic promoter system: Modeling using a thermodynamic framework

Prediction of phase stability conditions of gas hydrates of methane and carbon dioxide in porous media

Phase Stability Conditions of the Methane + Tetrabutylphosphonium Bromide + Water Semiclathrate Hydrate System in the Presence and Absence of NaCl and/or MgCl2: Experimental Measurements and Thermodynamic Modeling

Phase stability conditions of clathrate hydrates in the (methane + 3-methyl-1-butanol + water), (methane + 3,3-dimethyl-2-butanone + water) and (methane + 2,3-dimethyl-2-butene + water) systems: Experimental measurements and thermodynamic modeling

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

Methane hydrate phase stability with lower mole fractions of tetrahydrofuran (THF) and tert-butylamine (t-BuNH2)

Phase stability conditions of carbon dioxide and methane clathrate hydrates in the presence of KBr, CaBr 2 , MgCl 2 , HCOONa, and HCOOK aqueous solutions: Experimental measurements and thermodynamic modelling

Phase stability conditions for clathrate hydrate formation in (fluorinated refrigerant + water + single and mixed electrolytes + cyclopentane) systems: Experimental measurements and thermodynamic modelling

Phase stability conditions of clathrate hydrates in the (methane + 3-methyl-1-butanol + water), (methane + 3,3-dimethyl-2-butanone + water) and (methane + 2,3-dimethyl-2-butene + water) systems: Experimental measurements and thermodynamic modeling