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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
发表期刊CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE
卷号32期号:4页码:908-914
摘要The 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.
文章类型Article
关键词Hydrate Porous Media Surface Tension Temperature Pore Radius
WOS标题词Science & Technology ; Physical Sciences
研究领域[WOS]Chemistry
关键词[WOS]PERTURBED-CHAIN SAFT ; GAS HYDRATE ; CARBON-DIOXIDE ; METHANE ; SILICA ; PORES
收录类别SCI
语种英语
WOS类目Chemistry, Multidisciplinary
WOS记录号WOS:000290076100021
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文献类型期刊论文
条目标识符http://ir.giec.ac.cn/handle/344007/10358
专题中国科学院广州能源研究所
作者单位Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Renewable Energy & Gas Hydrate, Guangzhou Ctr Gas Hydrate Res, Guangzhou 510640, Guangdong, Peoples R China
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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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