Acta Chimica Sinica ›› 2011, Vol. 69 ›› Issue (09): 1135-1140. Previous Articles    




  1. (1山东科技大学土建学院 山东省土木工程防灾减灾重点实验室 青岛 266510)
    (2国土资源部海洋油气资源与环境地质重点实验室 青岛266071)
    (3青岛海洋地质研究所 青岛 266071)
  • 收稿日期:2010-08-25 修回日期:2010-11-01 出版日期:2011-05-14 发布日期:2010-12-10
  • 通讯作者: 孙始财
  • 基金资助:


Stable Conditions for Methane Hydrate in Quartz Sand

Sun Shicai*,1,2<,3 Ye Yuguang2,3 Liu Changling2,3 Tan Yunzhen1 Xiang Fengkui1,3 Ma Yan3   

  1. (1 Shandong Provincial Key Laboratory of Civil Engineering Disaster Prevention and Mitigation, College of Civil Engineering and Architecture, Shandong University of Science and Technology, Qingdao 266510)
    (2 The key Laboratory of Marine Hydrocarbon Resources and Environmental Geology, Ministry of Land and Resources, Qingdao 266071)
    (3 Qingdao Institute of Marine Geology, Qingdao 266071)
  • Received:2010-08-25 Revised:2010-11-01 Online:2011-05-14 Published:2010-12-10
  • Contact: SUN Shicai

Methane hydrate were synthesized in fine quartz sand with different size (160~200 mesh, 200~300 mesh, 300~400 mesh, 400~600 mesh) to determine the stable temperature-pressure conditions (p-T) for methane hydrates using step-heating decomposition method. The results showed that fine particles of quartz sand significantly affect methane hydrate stable conditions, of which 160~200 mesh quartz sand is the boundary mesh one whether the p-T conditions for methane hydrate is different or not under experimental tests. The maximum temperature difference for stable conditions of methane hydrates is 1.5 K between fine quartz sand and bulk water. For each of fine particles of quartz sand, the p-T data of methane hydrates is discrete at different temperature and pressure, and p-T data curves intersected in different quartz sand. This is different with the results in the literatures simulated with silica gel or glass bead. In the literatures, the p-T data curve shifts to the left at the same extent.

Key words: quartz sand, methane hydrate, stable condition, formation and dissociation, step-heating dissociation method