Relation between soil matrix potential changes and water conversion ratios during methane hydrate formation processes in loess  

作　　者：Peng Zhang Qingbai Wu Guanli Jiang Yibin Pu 

机构地区：[1]State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, Gansu, China

出　　处：《Journal of Natural Gas Chemistry》2011年第2期140-144,共5页天然气化学杂志（英文版）

基　　金：supported by the CAS Knowledge Innovation Key Project (Grant No. KZCX2-YW-330);the National Science Fund Fostering Talents in Basic Research to Glaciology and Geocryology (Grant No. J0630966);the Training Fund of State Key Laboratory of Frozen Soil Engineering of Chinese Academy of Sciences (Grant No. 52YOSF102)

摘　　要：With a new apparatus designed and assembled by ourselves, the matrix potential of non-saturated loess was firstly measured and studied during methane hydrate formation processes. The experimental results showed that during two formation processes, the matrix potential changes of the loess all presented a good linear relationship with water conversion ratios. In addition, although it was well known that the secondary gas hydrate formation was easier than the initial, our experimental results showed that the initial hydrate formation efficiency in non-saturated loess was higher than that of the secondary.

关 键 词：hydrate formation non-saturated loess matrix potential water conversion ratio 

分 类 号：TU444[建筑科学—岩土工程] TE642[建筑科学—土工工程]