A Phase Equilibrium Model for Gas Hydrates Considering Pore-Size Distribution of Sediments

doi:10.3866/PKU.WHXB20110204

IMECH-IR > 水动力学与海洋工程重点实验室(2009-2011)

	A Phase Equilibrium Model for Gas Hydrates Considering Pore-Size Distribution of Sediments
	Yan RT; Wei HZ; Wu EL; Wang SY(王淑云); Wei CF(韦昌富); Wei, CF (reprint author), Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geoengn, Wuhan 430071, Peoples R China
发表期刊	Acta Physico-Chimica Sinica
	2011
卷号	27 期号:2 页码:295-301
ISSN	1000-6818
摘要	The phase equilibrium condition for gas hydrates has been an important and difficult subject in gas hydrate-related research. In this paper, the mechanism of the effect of pore-size distribution on the phase equilibrium is first explored and the concept of effective pore radius is proposed. Using information on the pore-size distribution of sediments, a relationship between hydrate saturation and effective pore radius is developed. Combined with the van der Waals-Platteeuw model, this relationship was then used to develop a new phase equilibrium model for gas hydrates in sediments, which can properly account for the effect of pore-size distribution. In contrast to the traditional models, this new model does not represent a curve on the p-T plane but instead addresses the relationship between the temperature, pressure, and hydrate saturation. Such a feature allows the new model to take into account the effect of pore-size distribution on the phase equilibrium while treating the formation and/or dissolution processes of gas hydrates in pores more realistically. The simulated results were compared with the experimental data available in literature showing that the new model gives better results compared with the other traditional models. Given the temperature and the pore pressure, the hydrate saturation can be determined using the proposed model. Therefore, the new model can be used to estimate the amount of hydrate resources in the field.
关键词	Gas Hydrate Phase Equilibrium Pore-size Distribution Hydrate Saturation Porous-media Methane Hydrate Silica-gels Stability Pressures Predict
学科领域	Chemistry
DOI	10.3866/PKU.WHXB20110204
URL	查看原文
收录类别	SCI ; CSCD
语种	英语
WOS记录号	WOS:000286597200005
关键词[WOS]	POROUS-MEDIA ; METHANE HYDRATE ; SILICA-GELS ; STABILITY ; PRESSURES ; PREDICT
WOS研究方向	Chemistry
WOS类目	Chemistry, Physical
项目资助者	The project was supported by the Open Research Fund of State Key Laboratory of Geomechanics and Geoengineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences (Z000801), the '100 Talents Project' of Chinese Academy of Sciences, and Funds of the Chinese Academy of Sciences for Key Topics in Innovation Engineering (KZCX2-YW-JS108).
课题组名称	LMFS海洋土力学(LHO)
论文分区	Q4
引用统计	被引频次：5[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/45037
专题	水动力学与海洋工程重点实验室(2009-2011)
通讯作者	Wei, CF (reprint author), Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geoengn, Wuhan 430071, Peoples R China
推荐引用方式 GB/T 7714	Yan RT,Wei HZ,Wu EL,et al. A Phase Equilibrium Model for Gas Hydrates Considering Pore-Size Distribution of Sediments[J]. Acta Physico-Chimica Sinica,2011,27,2,:295-301.
APA	Yan RT,Wei HZ,Wu EL,王淑云,韦昌富,&Wei, CF .(2011).A Phase Equilibrium Model for Gas Hydrates Considering Pore-Size Distribution of Sediments.Acta Physico-Chimica Sinica,27(2),295-301.
MLA	Yan RT,et al."A Phase Equilibrium Model for Gas Hydrates Considering Pore-Size Distribution of Sediments".Acta Physico-Chimica Sinica 27.2(2011):295-301.

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