Experimental measurement and thermodynamic modeling of dissociation conditions of hydrogen sulfide hydrate in the presence of electrolyte solutions | |
Sun Jiyue1,4; Sun Rui2; Chou I−Ming1; Anh V. Nguyen3; Jiang Lei1 | |
刊名 | Chemical Engineering Journal |
2022-03 | |
卷号 | 2022期号:431页码:133821 |
关键词 | Hydrogen sulfide hydrate Dissociation conditions Electrolytes Thermodynamic model |
ISSN号 | 1385-8947 |
DOI | 10.1016/j.cej.2021.133821 |
通讯作者 | Jiang Lei |
英文摘要 | Understanding of hydrogen sulfide (H2S) hydrates phase equilibrium is important for sour gas production and transportation. In this study, hydrate dissociation conditions of H2S were measured in aqueous NaCl, KCl, MgCl2, NH4Cl, Na2SO4, and K2SO4 solutions at temperatures ranging from 273.4 to 298.8 K, pressures ranging from 1.13 to 21.90 bar, and weight percent of electrolyte ranging from 3.4 to 20.0 wt%. The experimental measurements were conducted in microcapillary silica tubes using an isothermal pressure search method. The dissociation enthalpies of H2S hydrate in electrolyte solutions were calculated by fitting the Clausius-Clapeyron equation to LHV (Liquid-Hydrate-Vapor) equilibrium curves. The result shows that the dissociation enthalpies of H2S hydrate in electrolyte solutions range from 57.7 to 71.5 kJ/mol. The inhibitory effect of six electrolytes on H2S hydrate formation is in the order of MgCl2 > NH4Cl > NaCl > KCl > Na2SO4 = K2SO4. Additionally, a thermodynamic model was developed to predict dissociation conditions of H2S hydrate in electrolyte solutions. The van der Waals-Platteeuw (vdW-P) model was used to describe the hydrate phase, and the liquid phase was modeled with the thermodynamic equation improved by Holder et al. The Duan-Moller-Weare-92 equation of state (DMW-92 EoS) and the Pitzer model were used to calculate fugacity and water activity, respectively. The average absolute deviations of pressure (AADP) indicate that the developed model can accurately predict the dissociation conditions of H2S hydrate for aqueous NaCl, KCl, Na2SO4, and K2SO4 solutions. Moreover, the valence band of hydroxyl group was used to characterize electrolytes effects on gas hydrate equilibrium conditions. |
资助项目 | National Natural Science Foundation of China[41873068] ; Key Frontier Science Program[QYZDY-SSW-DQC008] ; Chinese Academy of Sciences |
WOS关键词 | EQUATION-OF-STATE ; PHASE-EQUILIBRIUM DATA ; MINERAL SOLUBILITIES ; CH4-CO2-H2O SYSTEM ; METHANE HYDRATE ; NATURAL-WATERS ; GAS ; PREDICTION ; NACL ; H2S |
WOS研究方向 | Engineering |
语种 | 英语 |
出版者 | ELSEVIER SCIENCE SA |
WOS记录号 | WOS:000819808100002 |
资助机构 | National Natural Science Foundation of China ; Key Frontier Science Program ; Chinese Academy of Sciences |
内容类型 | 期刊论文 |
版本 | 预印本 |
源URL | [http://ir.idsse.ac.cn/handle/183446/9073] |
专题 | 深海科学研究部_深海极端环境模拟研究实验室 |
通讯作者 | Jiang Lei |
作者单位 | 1.Institute of Deep-sea Science and Engineering, Chinese Academy of Sciences 2.Northwest University 3.University of Queensland 4.University of Chinese Academy of Sciences1 |
推荐引用方式 GB/T 7714 | Sun Jiyue,Sun Rui,Chou I−Ming,et al. Experimental measurement and thermodynamic modeling of dissociation conditions of hydrogen sulfide hydrate in the presence of electrolyte solutions[J]. Chemical Engineering Journal,2022,2022(431):133821. |
APA | Sun Jiyue,Sun Rui,Chou I−Ming,Anh V. Nguyen,&Jiang Lei.(2022).Experimental measurement and thermodynamic modeling of dissociation conditions of hydrogen sulfide hydrate in the presence of electrolyte solutions.Chemical Engineering Journal,2022(431),133821. |
MLA | Sun Jiyue,et al."Experimental measurement and thermodynamic modeling of dissociation conditions of hydrogen sulfide hydrate in the presence of electrolyte solutions".Chemical Engineering Journal 2022.431(2022):133821. |
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