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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
Source PublicationJOURNAL OF CHEMICAL THERMODYNAMICS
Volume55Pages:110-114
Abstract

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.

SubtypeArticle
KeywordCo2 Hydrate Phase Equilibrium Mgcl2 Nacl
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1016/j.jct.2012.06.025
WOS Subject ExtendedThermodynamics ; Chemistry
WOS KeywordCARBON-DIOXIDE ; ELECTROLYTE SOLUTIONS ; DISSOCIATION PRESSURES ; CLATHRATE-HYDRATE ; GAS-MIXTURES ; METHANE ; MGCL2 ; PREDICTION ; ALCOHOL ; SYSTEMS
Indexed BySCI
Language英语
WOS SubjectThermodynamics ; Chemistry, Physical
WOS IDWOS:000308075000016
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Document Type期刊论文
Identifierhttp://ir.giec.ac.cn/handle/344007/10159
Collection中国科学院广州能源研究所
Affiliation1.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
Recommended Citation
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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