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Phase Equilibrium and Dissociation Enthalpies for Cyclopentane plus Methane Hydrates in NaCl Aqueous Solutions
Chen, Zhao-Yang1; Li, Qing-Ping2; Yan, Zhong-Yuan1; Yan, Ke-Feng1; Zeng, Zhi-Yong1; Li, Xiao-Sen1
2010-10-01
发表期刊JOURNAL OF CHEMICAL AND ENGINEERING DATA
ISSN0021-9568
卷号55期号:10页码:4444-4449
产权排序[Chen, Zhao-Yang; Yan, Zhong-Yuan; Yan, Ke-Feng; Zeng, Zhi-Yong; Li, Xiao-Sen] Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Renewable Energy & Gas Hydrate, Guangzhou 510640, Peoples R China; [Li, Qing-Ping] CNOOC Res Ctr, Technol Res Dept, Beijing 100027, Peoples R China
通讯作者lixs@ms.giec.ac.cn
摘要The phase equilibrium data of cyclopentane (CP) + methane hydrates in brine water with NaCl mass fractions of w = 0.0.035, 0.070, and 0.100 were measured in the temperature range (284.4 in 301.3) K using a visual high-pressure phase equilibrium apparatus. The dissociation enthalpies of CP + methane hydrates in hot brine water were determined via the Clausius-Clapeyron equation based on these phase equilibrium data. The effect of help gas and salinity on the phase equilibrium of CP hydrate and CP + methane hydrates was studied, respectively. Liquid CP forms hydrates with small-molecule help gas at a temperature region much higher than the quadruple point of pure CP hydrate. Methane partially occupied the small cages of structure II hydrate, which accelerates the nucleation and growth of CP + methane hydrates and increases the stability of the hydrates. The phase equilibrium pressure of CP + methane hydrates increases with the increase in temperature, and it increases linearly with the increase in NaCl concentration in solutions. The higher the temperature, the more remarkable effect the temperature and salinity has on the phase equilibrium pressure. The dissociation enthalpy decreases with the increase in temperature and the NaCl concentration.
文章类型Article
其他摘要The phase equilibrium data of cyclopentane (CP) + methane hydrates in brine water with NaCl mass fractions of w = 0.0.035, 0.070, and 0.100 were measured in the temperature range (284.4 in 301.3) K using a visual high-pressure phase equilibrium apparatus. The dissociation enthalpies of CP + methane hydrates in hot brine water were determined via the Clausius-Clapeyron equation based on these phase equilibrium data. The effect of help gas and salinity on the phase equilibrium of CP hydrate and CP + methane hydrates was studied, respectively. Liquid CP forms hydrates with small-molecule help gas at a temperature region much higher than the quadruple point of pure CP hydrate. Methane partially occupied the small cages of structure II hydrate, which accelerates the nucleation and growth of CP + methane hydrates and increases the stability of the hydrates. The phase equilibrium pressure of CP + methane hydrates increases with the increase in temperature, and it increases linearly with the increase in NaCl concentration in solutions. The higher the temperature, the more remarkable effect the temperature and salinity has on the phase equilibrium pressure. The dissociation enthalpy decreases with the increase in temperature and the NaCl concentration.
关键词Carbon-dioxide Gas-production
学科领域Chemistry ; Engineering
WOS标题词Science & Technology ; Physical Sciences ; Technology
DOI10.1021/je100597e
研究领域[WOS]Chemistry ; Engineering
URL查看原文
关键词[WOS]CARBON-DIOXIDE ; GAS-PRODUCTION
收录类别SCI
语种英语
项目资助者National Natural Science Foundation of China [50874098, U0733003, 20773133]; Guangdong Province Natural Science Foundation [07301638]; Chinese Academy of Sciences [KGCX-YW-3X6]; Science & Technology Program of Guandong Province [2009B050600006]
WOS类目Chemistry, Multidisciplinary ; Engineering, Chemical
WOS记录号WOS:000282848400049
引用统计
被引频次:31[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.giec.ac.cn/handle/344007/8485
专题中国科学院广州能源研究所
天然气水合物开采技术与综合利用实验室
作者单位1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Renewable Energy & Gas Hydrate, Guangzhou 510640, Peoples R China
2.CNOOC Res Ctr, Technol Res Dept, Beijing 100027, Peoples R China
推荐引用方式
GB/T 7714
Chen, Zhao-Yang,Li, Qing-Ping,Yan, Zhong-Yuan,et al. Phase Equilibrium and Dissociation Enthalpies for Cyclopentane plus Methane Hydrates in NaCl Aqueous Solutions[J]. JOURNAL OF CHEMICAL AND ENGINEERING DATA,2010,55(10):4444-4449.
APA Chen, Zhao-Yang,Li, Qing-Ping,Yan, Zhong-Yuan,Yan, Ke-Feng,Zeng, Zhi-Yong,&Li, Xiao-Sen.(2010).Phase Equilibrium and Dissociation Enthalpies for Cyclopentane plus Methane Hydrates in NaCl Aqueous Solutions.JOURNAL OF CHEMICAL AND ENGINEERING DATA,55(10),4444-4449.
MLA Chen, Zhao-Yang,et al."Phase Equilibrium and Dissociation Enthalpies for Cyclopentane plus Methane Hydrates in NaCl Aqueous Solutions".JOURNAL OF CHEMICAL AND ENGINEERING DATA 55.10(2010):4444-4449.
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