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甲烷气体与水在一定温度和压力环境中能形成一种结晶水化物,其分子式可用CH_4·nH_2O来表示。我们在压力(P)2.7—9.0MPa及对应的温度(T)0.2—9.8℃内合成了甲烷水化物、且其关系可用P=AB~T来表示。甲烷水化物分解压力在3.0—9.0MPa内测得其对应的分解温度为1.75—11.7℃;且其关系也可用P_(分解)=CD~(T分解)来表示。甲烷水化物的合成条件与分解条件是不一致的,具有滞后现象。测得水化物的n值为6.3—6.6(即气水比为1:6.3—1:6.6);密度0.910—0.905g/cm~3。
Methane gas and water in a certain temperature and pressure environment can form a crystalline hydride, the formula can be used CH_4 · nH_2O to represent. Methane hydrate was synthesized at a pressure (P) of 2.7-9.0 MPa and a corresponding temperature (T) of 0.2-9.8 ° C, and the relationship can be expressed as P = AB ~ T. Methane hydrate decomposition pressure 3.0-9.0MPa measured within the corresponding decomposition temperature of 1.75-11.7 ℃; and its relationship can also be P_ (decomposition) = CD ~ (T decomposition) to represent. Methane hydrate synthesis conditions and decomposition conditions are inconsistent, with hysteresis. Measured hydrate n value of 6.3-6.6 (ie gas-water ratio of 1: 6.3-1: 6.6); density 0.910-0.905g / cm ~ 3.