收稿日期: 2011-07-12
修回日期: 2011-11-26
网络出版日期: 2012-04-10
基金资助
中国科学院寒区旱区环境与工程研究所人才基金项目(编号：510984791)；国家自然科学基础人才培养基金冰川冻土学特殊学科点项目(编号：J0930003;J0109)联合资助.
Effect of Methane Hydrate Dissociation on Natural Gas Storage and Transportation
Received date: 2011-07-12
Revised date: 2011-11-26
Online published: 2012-04-10
天然气水合物储运技术涉及水合物的生产、运输和再气化等过程,其中水合物的生产过程、运输过程是要解决的关键问题。实验采用6种不同粒径的冰颗粒形成甲烷水合物，并且在不同的温度条件下开展甲烷水合物分解实验。通过分析认为，冰颗粒对甲烷水合物形成过程有一定的影响，冰颗粒粒径越小越容易形成水合物，形成时间也较短；而在分解过程中，大粒径的冰颗粒形成的甲烷水合物在2种温度条件下均表现出较强的自保护效应，能长时间保持亚稳定状态而不发生分解反应。根据实验中出现的这些特性，提出对天然气水合物储运技术的设想，在水合物形成过程中选取一个最佳的粒径冰颗粒合成水合物,并且在-4℃的温度条件下进行储运。
展静, 吴青柏, 杨玉忠 . 冰点以下甲烷水合物分解实验对天然气储运的影响[J]. 天然气地球科学, 2012 , 23(2) : 348 -352 . DOI: 10.11764/j.issn.1672-1926.2012.02.348
The technology of natural gas hydrate storage and transport involves hydrate production,transportation and regasification process.Among them,the hydrate production and transportation are the key issue.In this study,six sizes of ice particles are used to simulate the methane hydrate formation,and the dissociation experiment of methane hydrate is carried out at different temperatures.Based on experimental data,we find out that the smaller the ice particle is,the easier the hydrate is to form and the shorter the formation time is under the same experimental conditions.But during the dissociation process,the methane hydrate formed from the bigger size of ice particle shows the self-protection and keep the long term sub-stable status and no dissociation at two different temperatures.Therefore,we proposes that the best sizes of ice particle to form natural gas hydrate and temperature of -4℃ for storage and transport gas hydrate would be chosen during its storage and transport.
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