Mitsubishi Jukogyo Kabushiki Kaisha

Chubu Electric Power Company, Inc.

Masaaki Negoro

Masaki Iijima

Hisao Haneda

Fumio Tomikawa

Masakazu Yamada

Masaki Minemoto

Tadaaki Tanii

Masaru Ishibashi

Toshihiro Kamata

Akira Saji

Matsushige Sakai

Takeo Hondoh

Yutaka Kawata

Hikaru Kitamura

Takefumi Murakami

Hidetomo Noda

Disclosed are a method for the fixation of carbon dioxide which is characterized by the steps of bringing carbon dioxide and seawater or fresh water into contact with each other at a temperature and a pressure required for the formation of carbon dioxide hydrate, and sinking it in the seawater or fresh water satisfying certain conditions for the stability of carbon dioxide hydrate; a method for the fixation of carbon dioxide which uses a pressurized pipeline for producing and cooling the hydrate and releases the product hydrate at a position in the sea where the hydrate can remain stable; an apparatus for fixing and dumping carbon dioxide which is disposed in seawater or fresh water satisfying certain pressure and temperature conditions for the formation of carbon dioxide hydrate and which comprises a container for producing carbon dioxide hydrate, and a discharge means for discharging the hydrate produced out of the container; and an apparatus for the treatment of carbon dioxide which comprises a reaction device disposed on a deep ocean floor, a pipeline for sending concentrated carbon dioxide to the reaction device, an ejector type nozzle at an end of the pipeline, and a means for dispersing carbon dioxide hydrate produced in the reaction device over the deep ocean floor.

Method for the fixation of carbon dioxide

A carbon dioxide clathrate having a lump diameter enough to precipitate on a desired abyssal position of the sea without being drifted by a seawater flow of the abyss can be produced by bringing an aqueous solution into contact with carbon dioxide with the interposition of an interface in a reactor and retaining this contact; adjusting the pressure in the reactor to 13 atm or more, the temperature of the aqueous solution to a level of more than 5.degree. C. to 10.degree. C., the temperature of the interface to a level of more than 10.degree. C. to 15.degree. C. and the temperature of a lug inserted into the aqueous solution to a level of more than 0.degree. C. to 5.degree. C.; producing/growing the carbon dioxide clathrate on the lug; and then heating the lug to a temperature of more than 10.degree. C. to 30.degree. C. to separate/drop the carbon dioxide clathrate therefrom.

Process for producing carbon dioxide clathrate

An apparatus for reducing the amount of carbon dioxide released into the atmosphere by fixing and dumping carbon dioxide which is disposed in seawater or fresh water satisfying certain temperature and pressure conditions for the formation of carbon dioxide hydrate or its clathrate comprising:

Method for the fixation of carbon dioxide, apparatus for fixing and

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Takasago, Japan

Masaaki Negoro