Kabushiki Kaisha Toshiba

Toshiba Energy Systems & Solutions Corporation

Toshiba Plant Systems & Services Corporation

Mitsuru Udatsu

Satoshi Saito

Hideo Kitamura

Masatoshi Hodotsuka

Akiko Suzuki

Shinji Murai

Takashi Kuboki

Yoshihiko Nakano

Reiko Yoshimura

Toshihiro Imada

Kenji Sano

Koshito Fujita

Tetsuya Kaseda

Asato Kondo

Daigo Muraoka

Yusuke Handa

Yasuhiro Kato

Noriko Chiba

Keita Nagano

Takehiko Muramatsu

Yukishige Maezawa

Kiyohiko Iwasa

Haruki Fujimoto

Satoru Kashimoto

Hiroko Watando

Kensuke Suzuki

Toshihisa Kiyokuni

Yukio Oohashi

Hayato Morigaki

Ryosuke Shibata

Noriko Takada

Nagano Keita

The embodiments provide an acidic gas absorbent having low diffusibility, an acidic gas removal method employing the acidic gas absorbent, and also an acidic gas removal apparatus employing the absorbent. The acidic gas absorbent according to the embodiment comprises: a particular tertiary amine compound, such as, an alkyl dialkanol amine or a hydroxyalkyl piperazine; a halogen-free ionic surfactant; and an aqueous solvent. The embodiments provide not only the acidic gas absorbent but also an acidic gas removal method and apparatus employing the acidic gas absorbent.

Acidic gas absorbent, acidic gas removal method and acidic gas removal apparatus

In one embodiment, an acid gas removing apparatus includes an absorber configured to bring a first gas including an acid gas and a lean solution into contact to discharge a rich solution that is the lean solution having absorbed the acid gas, a regenerator configured to separate the acid gas from the rich solution discharged by the absorber to discharge the lean solution that is the rich solution separated from the acid gas, and a measuring instrument configured to measure a temperature of the rich or lean solution in the regenerator. Furthermore, an acid gas removal control apparatus that controls the acid gas removing apparatus includes a receiver configured to receive the measured temperature, and a controller configured to control resupply of a resupplied solution to the rich or lean solution or removal of an acid component from the rich or lean solution, based on the received temperature.

Acid gas removal control apparatus, acid gas removal control method, and acid gas removing apparatus

According to embodiment, a carbon dioxide capturing system cools a regenerator discharge gas discharged from a regeneratorcontaining carbon dioxide by a cooling unit, and then sends the gas to a cleaner. The cleanerreceives condensed water generated from the regenerator discharge gas cooled by the cooler, and a gaseous cooled regenerator discharge gas, and cleans the cooled regenerator discharge gas by a cleaning liquid. The cleanerhas a first liquid reservoirconfigured to store the condensed water, and a second liquid reservoirconfigured to store the cleaning liquid having cleaned the cooled regenerator discharge gas.

Carbon dioxide capturing system and operation method thereof

In one embodiment, a carbon dioxide capturing system includes an absorber to absorb CO2 from first gas into lean liquid, and produce rich liquid that is the lean liquid absorbing the CO2 and second gas that is the first gas removing the CO2, and a regenerator to separate third gas including the CO2 from the rich liquid flowing from the absorber, and provide the lean liquid and the third gas. The system further includes a flowmeter to measure a flow rate of the third gas, a liquid level gauge to measure a liquid level of the lean liquid and/or the rich liquid, and a controller to regulate a quantity of heat energy supplied to the regenerator based on the flow rate of the third gas, and regulate a total amount of the lean liquid and the rich liquid in the system based on the liquid level.

Carbon dioxide capturing system and method of operating the same

The embodiments provide an acidic gas absorbent kept from deterioration, an acidic gas removal method using the absorbent, and an acidic gas removal apparatus using the same. The acidic gas absorbent contains an amine compound and water, and further contains superfine bubble containing inert gas wherein an average diameter of said superfine bubble is 150 nm or less. The acidic gas removal method provided here employs that absorbent. The acidic gas removal apparatus is equipped with a unit for introducing the superfine bubbles into the absorbent.

The embodiments provide an acidic gas absorbent having low diffusibility, an acidic gas removal method, and an acidic gas removal apparatus. The acidic gas absorbent according to the embodiment comprises: an amine compound having a vapor pressure of 0.001 to 10 Pa at 20&#xb0; C.; a water-soluble polymer compound having a mass-average molecular weight of 900 to 200000 and not containing a functional group having a pKa value greater than 7 except for hydroxy; and water.

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

The embodiments provide an acidic gas absorbent, an acidic gas removal method using the absorbent, and an acidic gas removal apparatus using the absorbent. The absorbent absorbs an acidic gas in a large amount and is hardly diffused. The acidic gas absorbent according to the embodiment comprises an amine compound represented by the following formula (1): 

A carbon dioxide absorbent of an embodiment includes a heterocyclic amine expressed by Formula (1), and the heterocyclic amine having a pKa of any one amino group included in a heterocyclic ring in Formula (1) in a range of 7.0 or more to 8.6 or less and an organic solvent having a boiling point of 150&#xb0; C. or more at 1 atm. A total mass of the heterocyclic amine and the organic solvent is 70 mass % or more to 100 mass % or less of the carbon dioxide absorbent. Each of Rto Rin Formula (1) is H, oxygen double-bonded with carbon of the heterocyclic ring, CH, OH, or an alkyl chain optionally including a functional group. Xin Formula (1) is H, CH, CO, C(O)OCH, C(O)OCH, C(O)OCH(CH), C(O)OC(CH), C(O)OCH, C(O)CH, or C(O)CH.

Carbon dioxide absorbent and apparatus of separating and recovering carbon dioxide

An acidic gas absorbent contains an amine compound of formula (1) and a cyclic amino compound of formula (2) or (3):   where in the formulas, each Ris independently a straight-chain hydroxyalkyl having a hydroxy at the terminal, Ris a branched-chain secondary alkyl group, Rand Rare hydrogen, hydroxy, a hydroxyalkyl or aminoalkyl, provided that at least one of Rand Rs is a hydroxyalkyl or aminoalkyl, each p is independently an integer of 2 to 4, each Ris independently hydrogen, hydroxy, or a hydroxyalkyl or aminoalkyl, provided that at least one of Rs is a hydroxyalkyl or aminoalkyl, and q is an integer of 3 to 8.

A carbon dioxide capturing system according to an embodiment is provided with a reboiler which heats an absorption liquid in a regeneration tower with a heated steam, and condenses the heated steam to generate a downstream side condensed water. The heated steam is supplied to the reboiler by an upstream side line. The downstream side condensed water is discharged from the reboiler by a downstream side line. A branched line branches from the upstream side line. The heated steam supplied to the branched line is cooled and condensed by an upstream side cooler, and an upstream side condensed water is generated. A physical quantity of an absorption liquid component in the upstream side condensed water and a physical quantity of an absorption liquid component in the downstream side condensed water are measured by a physical quantity measurement device.

Carbon dioxide capturing system and operation method of carbon dioxide capturing system

A carbon dioxide capture system includes a first capture system and a second capture system. The first capture system including a first absorber that causes carbon dioxide contained in a combustion exhaust gas to be absorbed in a first absorbing liquid. The second capture system causes carbon dioxide contained in a combustion exhaust gas to be absorbed in a second absorbing liquid. The second rich liquid releases carbon dioxide at a lower temperature than the first rich liquid.

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

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.

The embodiments provide an acidic gas absorbent, an acidic gas removal method, and an acidic gas removal apparatus. The absorbent absorbs an acidic gas in a large amount and hardly diffuses in air. The acidic gas absorbent according to the embodiment comprises an amine compound having a sulfonyl group and two or more amino groups.

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Kawasaki, Japan

Mitsuru Udatsu