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| 多步分解法初步研究石英砂中甲烷水合物p-T稳定条件 | |
| 引用本文： | 孙始财,业渝光,刘昌岭,谭允祯,孟庆国,马燕,相凤奎.多步分解法初步研究石英砂中甲烷水合物p-T稳定条件[J].现代地质,2010,24(3). |
| 作者姓名： | 孙始财 业渝光 刘昌岭 谭允祯 孟庆国 马燕 相凤奎 |
| 作者单位： | 1. 山东科技大学,土木建筑学院,山东省土木工程防灾减灾重点实验室,山东,青岛,266510;青岛海洋地质研究所,山东,青岛,266071 2. 青岛海洋地质研究所,山东,青岛,266071 3. 山东科技大学,土木建筑学院,山东省土木工程防灾减灾重点实验室,山东,青岛,266510 |
| 基金项目： | 科技部国家重点基础研究发展计划项目，国家"海域天然气水合物资源调查与评价"专项项目，山东省自然科学基金项目 |
| 摘 要： | 设计加工了一套研究海底沉积物水合物稳定条件实验装置,采用多步加热分解的方法对不同孔隙度的石英砂沉积物甲烷水合物相态平衡点(p-T稳定条件)进行了初步研究。为校验实验装置和实验方法,首先对甲烷水合物在十二烷基硫酸钠(SDS)溶液中的生成和分解过程进行了研究,获得的实验数据与文献数据吻合得很好。在此基础上,以4种不同粒径(96~180μm、180~380μm、212~380μm和380~830μm)的石英砂为介质,分别研究了甲烷水合物的p-T稳定条件。结果表明,实验测得的数据与纯水溶液中的结果基本一致,说明在实验所用的不同粒径石英砂构成的孔隙尺度内,毛细管作用对水合物相态点的影响可以忽略。 |
| 关 键 词： | 多步分解法 石英砂 甲烷水合物 p-T稳定条件 |
Preliminary Experiment of Stable p-T Conditions of Methane Hydrate in Quartz Sand with Multi-step Dissociation Method |
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| SUN Shi-cai,YE Yu-guang,LIU Chang-ling,TAN Yun-zhen,MENG Qing-guo,MA Yan,XIANG Feng-kui.Preliminary Experiment of Stable p-T Conditions of Methane Hydrate in Quartz Sand with Multi-step Dissociation Method[J].Geoscience——Journal of Graduate School,China University of Geosciences,2010,24(3). | |
| Authors: | SUN Shi-cai YE Yu-guang LIU Chang-ling TAN Yun-zhen MENG Qing-guo MA Yan XIANG Feng-kui |
| Abstract: | An experimental setup used to study the stability conditions of marine hydrate is established,and a preliminary investigation of methane hydrate phase equilibrium(p-T stability conditions) in quartz sand with different pore sizes is developed with multi-step dissociation method.Firstly,the formation and decomposition of methane hydrate in the sodium dodecyl sulfate(SDS) solution are performed to verify the reliability and efficiency of the setup and experimental methods.The obtained experimental data agree well with those from the literatures.Secondly,the stable p-T conditions of methane hydrate in quartz sand sediment and SDS solution are carried out.The particle sizes of quartz sand are 96-180 μm,180-380 μm,212-380 μm,and 380-830 μm,respectively.The measured stable p-T conditions of methane hydrate in quartz with various sizes are well consistent with those in pure water solution,suggesting that the pore capillary effect of quartz sand sediment can be ignored. |
| Keywords: | multi-step dissociation method quartz sand methane hydrate stable p-T condition |
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