| 甲烷水合物在AlCl3溶液中的相平衡条件 |
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| 引用本文： | 郑艳红,雷怀彦,王峰,吴保祥.甲烷水合物在AlCl3溶液中的相平衡条件[J].沉积学报,2002,20(3):519-523. |
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| 作者姓名： | 郑艳红 雷怀彦 王峰 吴保祥 |
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| 作者单位： | 1 中国科学院兰州地质研究所,气体地球化学国家重点实验室,兰州,730000; |
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| 基金项目： | 国家自然科学基金，国家重点实验室基金，中国科学院广州分院项目，49973024，SJJ-01-02，，，， |
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| 摘 要： | 利用可视法测定了甲烷水合物在AlCl3溶液中的三相平衡(甲烷水合物-AlCl3液相-甲烷气相)条件.AlCl3溶液中甲烷水合物的生成压力为4.040～8.382 MPa,温度为272.15～278.15 MPa.对相同摩尔浓度的AlCl3和KCl溶液中甲烷水合物生成条件的抑制作用进行了讨论.并将实验结果与前人的研究数据进行了对比,通过统计分析得到一计算甲烷水合物相平衡压力与温度的经验公式,经计算所得结果与实验数据一致.研究认为AlCl3溶液可以作为一种良好的抑制剂用于油气工业的输送管道中。
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| 关 键 词： | 甲烷水合物 AlCl3溶液 相平衡 |
| 文章编号： | 1000-0550(2002)03-0519-05 |
| 收稿时间： | 2001-09-06 |
| 修稿时间： | 2001年9月6日 |
Phase Equilibrium of Methane Hydrates in the Presence of AlCl3 |
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| ZHENG Yan-hong,LEI Huai-yan,WANG Feng,WU Bao-xiang.Phase Equilibrium of Methane Hydrates in the Presence of AlCl3[J].Acta Sedimentologica Sinica,2002,20(3):519-523. |
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| Authors: | ZHENG Yan-hong LEI Huai-yan WANG Feng WU Bao-xiang |
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| Institution: | 1 State Key Laboratory of Gas Geochemistry, Lanzhou Institute of Geology, Chinese Academy Sciences, Lanzhou,730000;2 University of Petroleum, Beijing,102249 |
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| Abstract: | Methane hydrates are nonstoichiometric crystalline compounds. They are formed by water molecules that are linked together with hydrogen bonds and form a three-dimensional structure with cavities. The cavities can be occupied by certain molecules of methane gases. One cavity can accommodate only one molecule. These molecules should not interfere with the hydrogen bonds among the water molecules, and they should have molecular diameters that are smaller than the diameter of the cavity. Methane hydrates play an important role in the exploitation, transportation, and processing of natural gas. There is a risk of hydrate formation at all the stages of natural gas handling due to the operating conditions of pressure and temperature that favor hydrate formation. We mainly discussed the equilibrium conditions of methane hydrates in this paper. The three-phase (H-Lw-V) equilibrium of the methane hydrate experiment system in aqueous solutions containing AlCl 3 was experimentally measured at pressures ranging from 4.040 to 8.382MPa and at temperatures between 272.15 and 278.15K using the isothermal pressure search method. The addition of AlCl 3 exhibited a stronger inhibition effect as that observed for other electrolytes (KCl) with the same concentration and discussed the reason. An empirical exponential equation is proposed to well correlate the measured data for aqueous solution. The computed values matched the experimental data obtained in this work very well. At last, the aqueous solutions containing AlCl 3 is a better inhibitor for oil-gas pipeline in the oil-gas industry. |
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| Keywords: | methane hydrates AlCl 3 solutions phase equilibrium |
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