Kabushiki Kaisha Toshiba

Toshiba Energy Systems & Solutions Corporation

Tetsuya Kaseda

Mitsuru Udatsu

Masatoshi Hodotsuka

Yasuhiro Kato

Koshito Fujita

Daigo Muraoka

Satoshi Saito

Shinji Murai

Hideo Kitamura

Takehiko Muramatsu

Yukishige Maezawa

Yusuke Handa

Disclosed herein are acid gas absorbents that afford high acid gas (CO2) absorption amount per unit volume and high absorption speed and can prevent the absorbent components from diffusing. The acid gas absorbent contains an amine compound of the formula (1) and a cyclic amine compound of the formula (3) or (3'): 

Acid gas absorbent, acid gas removal method, and acid gas removal device

A carbon dioxide capture system according to an embodiment includes a carbon dioxide capturer, a first washer, and a second washer. The first washer includes a spray configured to spray first cleaning liquid supplied under first pressure. The second washer includes a cleaning liquid diffuser configured to diffuse and drop second cleaning liquid supplied under second pressure lower than the first pressure.

Carbon dioxide capture system and method of operating carbon dioxide capture system

An acid component removal device for removing an acid component from an acid gas absorbent containing an amine, comprising:

Acid component removal device, acid component removal method, and acid gas removal device

Disclosed herein are acid gas absorbents that afford high acid gas (CO2) absorption amount per unit volume and high absorption speed and can prevent the absorbent components from diffusing. Also disclosed herein is a method and device for removing an acid gas, in which the energy required for separating the acid gas and regenerating the absorbent is reduced, are provided.

In one embodiment, a carbon dioxide capturing system includes an absorber configured to include a first contact portion that brings a combustion exhaust gas containing carbon dioxide into contact with an absorbing liquid containing an amine compound, cause the absorbing liquid to absorb at least a portion of the carbon dioxide in the combustion exhaust gas at the first contact portion, and release the combustion exhaust gas. The system further includes a washing apparatus configured to include a second contact portion that brings the combustion exhaust gas released from the first contact portion of the absorber into contact with a washing liquid, and configured such that the combustion exhaust gas and the washing liquid are individually fed to an upstream side of the second contact portion.

Carbon dioxide capturing system and exhaust gas processing method

An acid-gas capturing apparatus according to an embodiment includes an absorption unit configured to discharge an absorption-unit exhaust gas, and a regeneration unit configured to discharge a regeneration unit exhaust gas. The regeneration unit exhaust gas is compressed in a compression unit. The absorption-unit exhaust gas or the regeneration unit exhaust gas before it is compressed by the compression unit is cleaned in a first cleaning unit by means of a first cleaning liquid. A compression-condensate liquid, which is generated by the compression of the regeneration unit exhaust gas in the compression unit, is mixed into the first cleaning liquid through a first compression-condensate-liquid line whose one end is connected to the compression unit.

Acid-gas capturing apparatus and acid gas capturing method

The present embodiments provide an acidic gas recovery apparatus or method capable of efficiently reducing emission of amine to the environment. In the embodiment, an acidic gas recovery apparatusA comprises: an acidic gas-absorber; a regeneration tower; a gas-cleaner; a cleaning liquid drawing-out line L; an absorbing liquid drawing-out line L; and an acidic component-removerA. The cleaning waterfrom the cleaning liquid drawing-out line Land a purified lean solutionC from the absorbing liquid drawing-out line Lare supplied to the acidic component-removerA. The acidic component-removerA comprises a cathode, an anode, an absorbing liquid-purification compartmentfor removing acidic components from the objective lean solutionB, and cleaning liquid compartments-and-. The cleaning wateris supplied to the cleaning liquid compartments.

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Kawasaki, Japan

Tetsuya Kaseda