@article{oai:kitami-it.repo.nii.ac.jp:00007193, author = {Kataoka, Satsuki and Kitamura, Osamu and Hyakutake, Kinji and Abe, Kiyoshi and Hachikubo, Akihiro and Shoji, Hitoshi}, journal = {Polar Meteorology and Glaciology}, month = {Nov}, note = {Experimental investigations were conducted to understand the formation process of CO_2 hydrate the chimney structure by using a gas bubble emission technique in water within a pressure cell. The detailed process was video-recorded and analyzed to study the initiation and growth behavior of hydrate chimney while the cell pressure was increased and gas supply rate decreased gradually with time. In the initial stage of chimney growth, a hydrate crystal started to form in a cup shape at the gas nozzle and ascended together with gas bubbles due to mechanical weakness of the hydrate/nozzle contact. Growth of hydrate chimney occurred with supercooling of 3K(overpressure of 0.60MPa) or more, and continued until the top end was closed completely by hydrate., application/pdf}, pages = {42--49}, title = {Formation experiments of CO_2 hydrate chimney in a pressure cell}, volume = {19}, year = {2005} }