粉土中CO2水合物的稳定性条件
Stability condition of CO2 hydrate in silts
查看参考文献14篇
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文摘
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测定纯CO2水合物和干密度为1.40,1.50,1.65g.cm-3粉土中CO2水合物的稳定性条件.通过实验数据的对比分析,表明了粉土孔隙效应对CO2水合物稳定性条件具有重要影响,较于纯水合物,粉土中水合物稳定性压力更高,温度更低.另外,比较了不同初始分解温度下1.50 g.cm-3粉土中CO2水合物的稳定性条件,证明了水合物初始分解温度会对沉积物中水合物的稳定性条件测定产生影响.最后,基于修正的van der Waals-Platteeuw热力学模型对干密度为1.65 g.cm-3粉土中CO2水合物稳定性条件进行分析,发现毛细效应对水合物稳定性条件的影响程度不是恒定的,随着水合物的分解,孔隙毛细效应逐步减弱,对水合物的稳定性条件影响逐渐减小 |
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其他语种文摘
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Evaluation of stability condition is an important issue in the study of gas hydrate. In this study, the stability conditions for the bulk CO2 hydrate and the CO2 hydrate in silts with dry densities 1.40 g.cm-3,1.50 g.cm-3 and 1.65 g.cm-3, respectively, are measured and compared. It is shown that the pore effect of silts affects the stability of CO2 hydrate. Compared with the bulk hydrate, the hydrate in the silts has higher equilibrium pressure and lower equilibrium temperature. In addition, the initial dissociation temperature of pore hydrate may affect the stability of hydrate in the silts. Based on the modified van der Waals-Platteeuw model, the stability conditions of gas hydrate in the silt with density 1.65 g.cm-3 are analyzed. It is found that the effect of capillarity on the stability varies. As the hydrate in the silt dissociates, the capillary effect diminishes |
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来源
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化工学报
,2011,62(4):889-894 【核心库】
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关键词
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粉土
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CO2水合物
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毛细效应
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稳定性条件
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地址
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1.
中国科学院武汉岩土力学研究所, 岩土力学与工程国家重点实验室, 湖北, 武汉, 430071
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中国科学院力学研究所, 北京, 100190
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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0438-1157 |
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学科
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石油、天然气工业 |
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基金
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中国科学院“百人计划”项目
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中国科学院知识创新工程重要方向项目
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岩土力学与工程国家重点实验室开放基金项目
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国家重大科技专项
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文献收藏号
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CSCD:4171624
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