| Summary: | Natural gas hydrates are non-stoichiometry compounds, in which the molecules of
gas are trapped in crystalline cells consisting of water molecules retained by
energy of hydrogen bonds. In hydrate form, one cubic meter of a methane hydrate
can retain up to 164 m3 of gas at standard temperature and pressure (STP), or it
can retain 4,26 m3 gas at the same condition. The experiment of Methane hydrate
formation is performed at a constant temperature in the reactor / sample cell filled
with various sizes of glass beads and water with ratio of weight is 6 : 1.5. Methane
gas is fed into the reactor at various pressures. Equilibrium condition is reached
when the system pressure does not change. The experimental results show that
size of the glass beads gives very small affect to the pressure equilibrium of
methane hydrate formation, so it can be neglected. The highest amount of
methane hydrate is formed at 274K, at 250 μm glass beads, and the equilibrium
pressure 27.90 bar. In this study, the equation of Langmuir constant is
*
+ with the value of A and B for small cage are 6.8465 and 18.0342.
The value of A and B for large cage are 7.7598 and 18.0361.
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