The formation of meso- and macroporous gas hydrates

Details The formation of meso- and macroporous gas hydrates The formation of meso- and macroporous gas hydrates

Sep 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000georl..27.2929k&link_type=abstract

Geophysical Research Letters, Volume 27, Issue 18, p. 2929-2932

Physics

13

Hydrology: Frozen Ground, Mineral Physics: Surfaces And Interfaces, Planetology: Solid Surface Planets: Polar Regions, Planetology: Solar System Objects: Comets

Scientific paper

We present results of experimental studies on the formation of gas hydrates (clathrates) at conditions of geophysical interest. Clathrate hydrates formed by a reaction of gas at ice Ih surfaces are always found to be mesoporous to macroporous with pores sizes between 100 to 400 nm and pore volumes of approximately 25-40% for CH4, Ar and N2 hydrate, and smaller pores of 20 to 100 nm with a porosity of approximately 10-20% for CO2 hydrate. The three-dimensional sponge-like microstructure occurs in single crystalline grains of typically a few μm size and was observed by field-emission scanning electron microscopy. It forms over a wide range of p-T conditions below the ice Ih melting. The porous microstructure is stable for at least several months, even close to the clathrate decomposition, and is proposed to be formed by local differences in the energy balance between hydrate formation and ice decomposition. The results presented are considered of potential major importance for the understanding of the behavior of natural gas hydrates found e.g. in polar ice sheets and permafrost regions, and also in some celestial bodies.

Affiliated with

Also associated with

No associations

Rating

The formation of meso- and macroporous gas hydrates does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The formation of meso- and macroporous gas hydrates, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The formation of meso- and macroporous gas hydrates will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1385811