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Phase equilibria of CO2 hydrate in NaCl-MgCl2 aqueous solutions
Zha, Li1,2; Liang, De-Qing1; Li, Dong-Liang1
2012-12-01
发表期刊JOURNAL OF CHEMICAL THERMODYNAMICS
卷号55页码:110-114
摘要

Phase equilibrium data for CO2 hydrate in presence of binary NaCl-MgCl2 aqueous solutions were obtained at four different concentrations (2 wt%NaCl-8 wt%MgCl2, 8 wt%NaCl-2wt%MgCl2, 5 wt% NaCl-15 wt%MgCl2, 15 wt% NaCl-5 wt%MgCl2) in the temperature range of (258.63 to 276.45) K and in the pressure range of (1.34 to 3.41) MPa, respectively. The measurements were carried out by employing isochoric pressure search method with uncertainties of +/- 0.1 K for temperature and +/- 0.02 MPa for pressure. The hydrate equilibrium data for the (CO2 + water) system were compared with some experimental data from the literature, and the acceptable agreement demonstrated the reliability of the experimental method used in this work. The van der Waals and Platteeuw (vdW-P) solid solution theory was used to model the hydrate phase, and the equation of Weiss combined with Pitzer-based model was applied to characterize the activity of water. The predicted results were in good consistency with the experimental data, and the average pressure deviation was 5.13%. (C) 2012 Elsevier Ltd. All rights reserved.

文章类型Article
关键词Co2 Hydrate Phase Equilibrium Mgcl2 Nacl
WOS标题词Science & Technology ; Physical Sciences
DOI10.1016/j.jct.2012.06.025
研究领域[WOS]Thermodynamics ; Chemistry
关键词[WOS]CARBON-DIOXIDE ; ELECTROLYTE SOLUTIONS ; DISSOCIATION PRESSURES ; CLATHRATE-HYDRATE ; GAS-MIXTURES ; METHANE ; MGCL2 ; PREDICTION ; ALCOHOL ; SYSTEMS
收录类别SCI
语种英语
WOS类目Thermodynamics ; Chemistry, Physical
WOS记录号WOS:000308075000016
引用统计
文献类型期刊论文
条目标识符http://ir.giec.ac.cn/handle/344007/10159
专题中国科学院广州能源研究所
作者单位1.Chinese Acad Sci, Key Lab Renewable Energy & Nat Gas Hydrate, Guangzhou Inst Energy Convers, Guangzhou 510640, Guangdong, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714
Zha, Li,Liang, De-Qing,Li, Dong-Liang. Phase equilibria of CO2 hydrate in NaCl-MgCl2 aqueous solutions[J]. JOURNAL OF CHEMICAL THERMODYNAMICS,2012,55:110-114.
APA Zha, Li,Liang, De-Qing,&Li, Dong-Liang.(2012).Phase equilibria of CO2 hydrate in NaCl-MgCl2 aqueous solutions.JOURNAL OF CHEMICAL THERMODYNAMICS,55,110-114.
MLA Zha, Li,et al."Phase equilibria of CO2 hydrate in NaCl-MgCl2 aqueous solutions".JOURNAL OF CHEMICAL THERMODYNAMICS 55(2012):110-114.
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