甲烷水合物分解过程模拟实验研究

现代地质 ›› 2008, Vol. 22 ›› Issue (3): 475-479.

甲烷水合物分解过程模拟实验研究

陈强¹,业渝光¹,孟庆国²,刘昌岭¹

1．国土资源部青岛海洋地质研究所，山东青岛 266071；
2．青岛大学化学化工与环境学院，山东青岛 266071

收稿日期:2008-01-25 修回日期:2008-04-28 出版日期:2008-03-20 发布日期:2008-03-20
基金资助:
国家专项“中国海域天然气水合物资源调查评价”项目（G2H200200202）

Experimental Research of Methane Hydrate Dissociation

CHEN Qiang¹, YE Yu-guang¹, MENG Qing-guo², LIU Chang-ling¹

1．Qingdao Institute of Marine Geology of the Ministry of Land and Resources, Qingdao, Shandong 266071, China； 2．College of Chemical Engineering and Environment, Qingdao University, Qingdao,Shandong 266071, China

Received:2008-01-25 Revised:2008-04-28 Online:2008-03-20 Published:2008-03-20
Supported by:
陈强，男，实习研究员，1980年出生，海洋地质学专业，从事天然气水合物模拟实验研究。

摘要/Abstract

摘要：

以甲烷为主要成分的天然气水合物被看作是一种新型的油气资源，研究水合物分解特征有助于水合物的开采利用。采用实验模拟的方法进行了甲烷水合物分解率研究，实验中采用了等容升温分解和不同粒径多孔介质体系常压分解等方法研究水合物的分解特征。从p=4.5 MPa下进行的等容分解实验结果发现，当釜内温度为5.18～8 ℃时水合物快速分解并一直持续到13 ℃分解结束，且等容分解过程中反应釜内压力与釜内温度呈良好的函数对应关系。常压分解研究使用了5种不同粒径沉积物作为反应介质，在T=1 ℃的条件下进行水合物分解实验，结果发现粒径在0.063～0.35 mm范围的沉积物对水合物的分解速率为1.11×10^-5~2.41×10^-5 mol/s，但分解速率并没有随粒径大小发生有规律的变化。

关键词: 甲烷水合物, 分解率, 常压分解, 等容分解, 模拟实验

Abstract:

Gas hydrates are considered to be a new kind of resources, it is critical to know the hydrate dissociation process to make good use of this resource. In this paper, simulation experiment is used to investigate the methane hydrate dissociation. There are two kinds of dissociation methods, one is isovolumetric dissociation and the other is normal pressure dissociation. The isovolumetric dissociation experiment is carried out at p=4.5 MPa, and the dissociation speed is fast during 5.18-8 ℃, and the reaction cell pressure has good relation with temperature. In the normal pressure dissociation, we use five different porous media to investigate the porous media effect during hydrate dissociation. The study is carried out at T=1 ℃ and we find that the dissociation speed is among 1.11×10^-5-2.41×10^-5 mol/s when the porous media radius are among 0.063-0.35 mm, but the speed is not proportional to the radius.

Key words: methane gas hydrate, dissociation speed, normal pressure dissociation, iso-bulk dissociation, simulation experiment

中图分类号:

P744

陈强,业渝光,孟庆国,刘昌岭. 甲烷水合物分解过程模拟实验研究[J]. 现代地质, 2008, 22(3): 475-479.

CHEN Qiang, YE Yu-guang, MENG Qing-guo, LIU Chang-ling. Experimental Research of Methane Hydrate Dissociation[J]. Geoscience, 2008, 22(3): 475-479.

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