Experimental determination and thermodynamic modeling of the hydrogen sulfide hydrate solubility in water

Wu, Chuanjun; Chen, Jiangzhi; Sun, Jiyue; Chou, I-Ming; Mei, Shenghua; Lin, Juezhi; Jiang, Lei

doi:10.1016/j.ces.2023.119474

Chemical Engineering Science

2024

DOI: 10.1016/j.ces.2023.119474

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Experimental determination and thermodynamic modeling of the hydrogen sulfide hydrate solubility in water

Chuanjun Wu,

Jiangzhi Chen,

Jiyue Sun

et al.

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Experimental and Modeling Study on Methane Hydrate Equilibrium Conditions in the Presence of Inorganic Salts

Fu,

Chen,

Pang

et al. 2024

Molecules

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The aim of this study was to determine the influence of four inorganic salts, KCl, NaCl, KBr and NaBr, on the thermodynamic conditions of methane hydrate formation. In order to achieve this, the vapor–liquid water-hydrate (VLWH) equilibrium conditions of methane (CH4) hydrate were measured in the temperature range of 274.15 K–282.15 K by the isothermal pressure search method. The results demonstrated that, in comparison with deionized water, the four inorganic salts exhibited a significant thermodynamic inhibition on CH4 hydrate. Furthermore, the inhibitory effect of Na+ on methane hydrate is more pronounced than that of K+, where there is no discernible difference between Cl− and Br−. The dissociation enthalpy (∆Hdiss) of CH4 hydrate in the four inorganic salt solutions is comparable to that of deionized water, indicating that the inorganic salt does not participate in the formation of hydrate crystals. The Chen–Guo hydrate model and N–NRTL–NRF activity model were employed to forecast the equilibrium conditions of CH4 hydrate in electrolyte solution. The absolute relative deviation (AARD) between the predicted and experimental values were 1.24%, 1.08%, 1.18% and 1.21%, respectively. The model demonstrated satisfactory universality and accuracy. This study presents a novel approach to elucidating the mechanism and model prediction of inorganic salt inhibition of hydrate.

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Experimental and Modeling Study on Methane Hydrate Equilibrium Conditions in the Presence of Inorganic Salts

Fu,

Chen,

Pang

et al. 2024

Molecules

View full text Add to dashboard Cite

show abstract

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Experimental determination and thermodynamic modeling of the hydrogen sulfide hydrate solubility in water

Cited by 1 publication

References 38 publications

Experimental and Modeling Study on Methane Hydrate Equilibrium Conditions in the Presence of Inorganic Salts

Experimental and Modeling Study on Methane Hydrate Equilibrium Conditions in the Presence of Inorganic Salts

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