Methane hydrate formation and release
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Uploaded by ValentineLabUCSB on May 13, 2010
This video was taken while on board the human operated submersible Alvin in July of 2007. What you see is a vent bubbling methane gas, which is captured inside a cylindrical tube and and methane hydrate is formed. The depth is 800 m beneath the sea surface, where the low temperature and high pressure lead to the formation of this ice-like structure from water and methane gas. You can see in the beginning that the bubbles from the vent are slowly filling the chamber. By the end, the chamber is completely filled with the ice-like methane hydrate. The pilot (of Alvin) then tries to break up the hydrate, and in doing so the buoyancy of the gas trapped in the ice forces the remaining hydrate out of the tube.
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the hydrate doesnt remain stable on the trip to the surface. It dissociates at the lower pressures and higher temps - forming regular methane gas and perhaps dissolving into the water if the trip to the surface is long enough.
fkinnaman 1 year ago
How does the hydrate remain stable on the trip to the surface?
Icix1 1 year ago
wow, this is like what's at deepwater horizon MC252 in the gulf right now. Problems anticipated there soon... Yikes.
MsMilkytheclown 1 year ago