Fixation of carbon dioxide by clathrate-hydrate

New method for ocean disposal of CO2 by a submerged kenics‐type static mixer

“…In these scenarios, CO 2 is captured from the postcombustion gases and then is released into the ocean in the form of gaseous CO 2 (Haugan and Drange, 1992;Saito et al, 2000), liquefied CO 2 (Herzog et al, 1997;Ozaki, 1997), dry ice (Nakashiki et al, 1991), or CO 2 hydrate (Saji et al, 1992;Yamasaki et al, 2000). The appropriate release depth changes with the buoyancy of the release in seawater and, therefore, varies with the form of the CO 2 .…”

Modelling of hydrate formation kinetics: State-of-the-art and future directions

“…Though initially studied as a nuisance to the oil industry, gas hydrates are now regarded as a promising alternative in the solution of some important global issues like energy supply and climate change. On account of their great capacity to store gases, they may provide a means not only to recover, transport and store natural gas for energy use (Gudmundsson et al, 1994Thomas and Dawe, 2003;Kohkar et al, 1998), but also to store carbon dioxide and safely dispose it in the ocean (Yamasaki et al, 2000b;Saji et al, 1992;Lee et al, 2002). Other applications are also envisaged, such as water desalination (Max, 2003(Max, , 2002(Max, , 2006, the fractionation of gases and liquids (Englezos, 1993) and the concentration of temperature-sensitive liquids (Huang et al, 1970;Purwanto et al, 2001), to name but a few.…”

Potential volume for CO2 deep ocean sequestration: an assessment of the area located on western Pacific Ocean

“…Liquid carbon dioxide could be introduced at depth to form a lake of CO 2 on the sea floor (Ohsumi 1993). Alternatively, CO 2 hydrate could be created in an apparatus designed to produce a hydrate pile or pool on the sea floor (Saji et al 1992). Simulation of CO 2 storage in a deep trench (Kobayashi 2003) indicates that the bottom topography can weaken vertical momentum and mass transfer, slowing the CO 2 dissolution rate.…”