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Hydrate Formation Phase Equilibrium Model in the Porous Media Based on PC-SAFT Equation of State
Zeng Zhi-Yong; Li Xiao-Sen
2011-04-10
Source PublicationCHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE
Volume32Issue:4Pages:908-914
AbstractThe thermodynamic model of hydrate equilibrium formation conditions in the porous media was studied. Based on the penturbed chain-statistical associating fluid theory(PC-SAFT) equation of state(EOS), combining with van der Waals-Platteuw model of hydrate and Kelvin equation of capillary, a phase equilibrium computational model was built.. Based on this model, the surface tension was further studied for methane and CO(2) hydrate. Firstly, values of surface tension were regressed from experimental equilibrium formation conditions. It is shown that the surface tension increases with the temperature increasing and decreases with the pore radius increasing, moreover, it shows a near-line trend. Thus, the surface tension function of temperature and pore radius was proposed. Parameters of the function were optimized from experimental data with genetic algorithm. The result shows that the revised model with the correlated surface tension has a distinct improvement in the predicting the hydrate equilibrium formation conditions, average absolute deviations are 1.66% and 2.76% for methane and CO(2) hydrates, respectively.
SubtypeArticle
KeywordHydrate Porous Media Surface Tension Temperature Pore Radius
WOS HeadingsScience & Technology ; Physical Sciences
WOS Subject ExtendedChemistry
WOS KeywordPERTURBED-CHAIN SAFT ; GAS HYDRATE ; CARBON-DIOXIDE ; METHANE ; SILICA ; PORES
Indexed BySCI
Language英语
WOS SubjectChemistry, Multidisciplinary
WOS IDWOS:000290076100021
Citation statistics
Document Type期刊论文
Identifierhttp://ir.giec.ac.cn/handle/344007/10358
Collection中国科学院广州能源研究所
AffiliationChinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Renewable Energy & Gas Hydrate, Guangzhou Ctr Gas Hydrate Res, Guangzhou 510640, Guangdong, Peoples R China
Recommended Citation
GB/T 7714
Zeng Zhi-Yong,Li Xiao-Sen. Hydrate Formation Phase Equilibrium Model in the Porous Media Based on PC-SAFT Equation of State[J]. CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE,2011,32(4):908-914.
APA Zeng Zhi-Yong,&Li Xiao-Sen.(2011).Hydrate Formation Phase Equilibrium Model in the Porous Media Based on PC-SAFT Equation of State.CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE,32(4),908-914.
MLA Zeng Zhi-Yong,et al."Hydrate Formation Phase Equilibrium Model in the Porous Media Based on PC-SAFT Equation of State".CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE 32.4(2011):908-914.
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