Water transfer characteristics in the vertical direction during methane hydrate formation and dissociation processes inside non-saturated media  

作　　者：Peng Zhang Qingbai Wu Guanli Jiang Jing Zhan Yingmei Wang 

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

出　　处：《Journal of Natural Gas Chemistry》2010年第2期139-145,共7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)

摘　　要：In order to study water transfer characteristics inside non-saturated media during methane hydrate formation and dissociation processes,water changes on the top,middle and bottom locations of experimental media during the reaction processes were continuously followed with a novel apparatus with three pF-meter sensors.Coarse sand,fine sand and loess were chosen as experimental media.It was experimentally observed that methane hydrate was easier formed inside coarse sand and fine sand than inside loess.Methane hydrate formation configuration and water transfer characteristics during methane hydrate formation processes were very different among the different non-saturated media,which were important for understanding methane hydrate formation and dissociation mechanism inside sediments in nature.

关 键 词：water transfer methane hydrate formation and dissociation processes non-saturated 

分 类 号：TQ442[化学工程—化学肥料工业] P744.4[天文地球—海洋科学]