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Hydrate Stability in the H2S-H2O system-Visual Observations and Measurements in a High-Pressure Optical Cell and Thermodynamic Models

文献类型：期刊论文

作者Sun, Jiyue2,3; Xin, Yang2,3; Chou, I-Ming3; Sun, Rui1; Jiang, Lei3
刊名JOURNAL OF CHEMICAL AND ENGINEERING DATA
出版日期2020-08-13
卷号65期号:8页码:3884-3892
ISSN号0021-9568
DOI10.1021/acs.jced.0c00217
英文摘要A visual method was developed to investigate the equilibrium phase relations of hydrate in the hydrogen sulfide (H2S)-H2O system using a high-pressure optical cell coupled with a heating-cooling stage under a microscope. The equilibrium pressure (P)-temperature (T) phase boundaries for the assemblages (1) hydrate (H)-liquid water (Lw)-vapor H2S [H2S (g)] and (2) H-Lw-liquid H2S [H2S (I)] were determined over a wide P-T range (0.0986 to 66.128 MPa and 272.4 to 307.7 K, respectively). In this study, a smaller visual cell was used, which has four advantages: (1) the phase transition process in a high-pressure optical cell under a microscope at various well-controlled P-T conditions can be fully observed; (2) the experimental run time is considerably reduced owing to the small experimental device, and <1 h is required to collect each equilibrium datum; (3) the experiment was sufficiently safe because the highpressure optical cell contains a small amount of H2S; and (4) the high-pressure optical cell is suitable for studying sample fluids at temperatures up to 873.15 K and pressures up to 100 MPa; the measurement range of P and T being far beyond that of previous studies. The van der Waals-Platteeuw model was used to calculate the equilibrium P-T lines for these two three-phase assemblages. To achieve more accurate results, the Kihara potential parameters were optimized using the improved values of H2S fugacity and its solubility in pure water, calculated from high-quality thermodynamic models, and the experimental data measured in this and previous studies. The average absolute deviations of the new model from the experimental data of this study are 1.1% and 5.8% for the H-Lw-H2S (g) and H-Lw-H2S (I) phase boundaries, respectively.
WOS关键词HYDROGEN-SULFIDE ; DISSOCIATION PRESSURES ; PHASE-EQUILIBRIUM ; NATURAL-GAS ; WATER ; H2S ; PREDICTION ; SOLUBILITY ; METHANE ; ARGON
资助项目National Natural Science Foundation of China[41873068] ; Key Frontier Science Program[QYZDY-SSW-DQC008] ; Chinese Academy of Sciences
WOS研究方向Thermodynamics ; Chemistry ; Engineering
语种英语
WOS记录号WOS:000562940600013
出版者AMER CHEMICAL SOC
资助机构National Natural Science Foundation of China ; Key Frontier Science Program ; Chinese Academy of Sciences
源URL[http://ir.idsse.ac.cn/handle/183446/7872]  
专题深海科学研究部_深海极端环境模拟研究实验室
科学技术处
通讯作者Jiang, Lei
作者单位1.Northwest Univ, Dept Geol, Xian 710069, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Inst Deep Sea Sci & Engn, CAS Key Lab Expt Study Deep Sea Extreme Condit, Sanya 572000, Hainan, Peoples R China
推荐引用方式
GB/T 7714		 Sun, Jiyue,Xin, Yang,Chou, I-Ming,et al. Hydrate Stability in the H2S-H2O system-Visual Observations and Measurements in a High-Pressure Optical Cell and Thermodynamic Models[J]. JOURNAL OF CHEMICAL AND ENGINEERING DATA,2020,65(8):3884-3892.
APA Sun, Jiyue,Xin, Yang,Chou, I-Ming,Sun, Rui,&Jiang, Lei.(2020).Hydrate Stability in the H2S-H2O system-Visual Observations and Measurements in a High-Pressure Optical Cell and Thermodynamic Models.JOURNAL OF CHEMICAL AND ENGINEERING DATA,65(8),3884-3892.
MLA Sun, Jiyue,et al."Hydrate Stability in the H2S-H2O system-Visual Observations and Measurements in a High-Pressure Optical Cell and Thermodynamic Models".JOURNAL OF CHEMICAL AND ENGINEERING DATA 65.8(2020):3884-3892.

入库方式： OAI收割

来源：深海科学与工程研究所

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