摘要
天然气水合物是由天然气中小分子气体(甲烷、乙烷等)在一定的温度、压力条件下和水作用生成的一类笼型结构的冰状晶体。形成天然气水合物的主要气体成分为甲烷,甲烷气体体积超过99.9%的天然气水合物通常称为甲烷水合物,它是一种典型的Ⅰ型水合物,广泛分布于海底以下0～1500m深的沉积带或陆地上的永久冻土带中,是自然界中甲烷存在的一种重要方式。
The experimental apparatus for gas hydrate in porous sediments is introduced.Under different constant temperature(1.0℃,2.0℃,4.0℃,7.0℃,10℃),the formation and dissociation of methane hydrate with three kinds of sediments granule(average diameters 0.15mm,0.06mm,0.03mm respectively) are studied.The saturation of methane hydrate in porous sediments is got by measuring the consumption of methane in vessel.The results find that the saturation increases as formation pressure and porosity of sediments increase.It is also showed that the P-T curve of methane hydrate in porous sediments departure to left comparing to the P-T curve in distilled water, which is accordant with the results from other papers involved.
出处
《海洋科学集刊》
CAS
2010年第1期139-148,共10页
Studia Marina Sinica
基金
国家高技术研究发展计划863项目(2006AA09209-6
2006AA09Z349)
国家自然科学基金项目(40706026)联合资助
