Methyl Hydrate Formation in Natural Gas Pipeline
Methyl Hydrate Formation in Natural Gas Pipeline
(OP)
In a natural gas pipeline system, we are taking 1200 psig methane at 40 degrees F and wil be dropping it to 480 psig, which we calculated will be -6 degrees F. Is formation of Methyl Hydrate in the pipeline of any concern? All the literature that I have read on methyl hydrate does not really answer the question, it says that it may happen but gives no information beyond that. Any help will be appreciated.





RE: Methyl Hydrate Formation in Natural Gas Pipeline
RE: Methyl Hydrate Formation in Natural Gas Pipeline
RE: Methyl Hydrate Formation in Natural Gas Pipeline
Best regards
Morten
RE: Methyl Hydrate Formation in Natural Gas Pipeline
RE: Methyl Hydrate Formation in Natural Gas Pipeline
Its a common misuderstanding that hydrates (i assume thats what you refer to when saying methane hydrides) require the presense off free water. Thermodynamically this is not true. It should however be noted that the formation temperature drops radically at low water partial pressures. There may also be large diffirences in the physical properties. The crystals might be small and tend not to stick for "dry" gasses (meaning gasses with some water but significantly warmer that their water dew point).
Best regards
Morten
RE: Methyl Hydrate Formation in Natural Gas Pipeline
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RE: Methyl Hydrate Formation in Natural Gas Pipeline
its a nice link. Among the references one should especially note Sloan, E.D.: Clathrate hydrates of natural gases.
Its a very expensive book (200 pounds as far as i remember) but its also THE reference on hydrates.
Best regards
Morten
RE: Methyl Hydrate Formation in Natural Gas Pipeline