Knowledge Management System Of Guangzhou Institute of Energy Conversion, CAS
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 |
ISSN | 0021-9568 |
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 |
DOI | 10.1021/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 | |
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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