摘要：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 (triangle 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.

关键字：inorganic salts; methane hydrate; inhibition; thermodynamics model

卷、期、页：卷: 29期: 15

发表日期：2024-08-01

期刊分区（SCI为中科院分区）：二区

收录情况：SCIE（科学引文索引网络版）

发表期刊名称：MOLECULES

参与作者：付强,陈明强,庞维新,温慧芸,雷欣

第一作者：徐振,刘曾奇

论文类型：期刊论文

论文概要：付强,陈明强,庞维新,徐振,刘曾奇,温慧芸,雷欣，Experimental and Modeling Study on Methane Hydrate Equilibrium Conditions in the Presence of Inorganic Salts，MOLECULES，2024，卷: 29期: 15

论文题目：Experimental and Modeling Study on Methane Hydrate Equilibrium Conditions in the Presence of Inorganic Salts