Mitsubishi Jukogyo Kabushiki Kaisha

Chubu Electric Power Company, Inc.

Fujifilm Corporation

Toshihiro Kamata

Takahiro Kato

Hirotaka Kitagawa

Yasufumi Ooishi

Koji Yasuda

Hisao Haneda

Tadaaki Tanii

Masaaki Negoro

Mamoru Araoka

Masaru Ishibashi

Tetsuo Sada

Matsushige Sakai

Takeo Hondoh

Akira Saji

Yutaka Kawata

Hikaru Kitamura

Hidetomo Noda

Takefumi Murakami

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

A boiler having a furnace, a tunnel section and a rear gas duct is improved by the fact that a partition wall at right angles to side walls of the rear gas duct is disposed in the rear gas duct to divide it into two passages. A low-pressure reheater is disposed in the divided passage nearest to the tunnel section and has a narrow width. Two partition walls are disposed in the other divided passage parallel to the side walls of the rear gas duct to further divide the passage into three passages. Superheaters are disposed in the further divided passages close to the side walls and a high-pressure reheater is disposed in the central further divided passage. In another embodiment, the locations of the superheater and the high-pressure reheater are reversed.

Supercritical sliding pressure operation boiler with rear gas duct

Growing community of inventors

Kobe, Japan

Toshihiro Kamata