Kabushiki Kaisha Toshiba

Toshiba Energy Systems & Solutions Corporation

Shinji Murai

Yoshihiko Nakano

Akiko Suzuki

Satoshi Saito

Takehiko Muramatsu

Shinetsu Fujieda

Yasuhiro Kato

Mitsuru Udatsu

Shuzi Hayase

Tatsuoki Kohno

Shuji Hayase

Hideyuki Tsuji

Nobuyuki Ashikaga

Taro Fukaya

Yukishige Maezawa

Takashi Kuboki

Daigo Muraoka

Toshiro Hiraoka

Reiko Yoshimura

Asato Kondo

Masatoshi Hodotsuka

Toshihiro Imada

Yukihiro Mikogami

Satoshi Mikoshiba

Yasuyuki Hotta

Kenji Sano

Hiroyasu Sumino

Shin-ichi Nakamura

Hiroko Watando

Koji Asakawa

Kenji Todori

Ken Uchida

Rumiko Hayase

Akira Yoshizumi

Yutaka Majima

Arisa Yamada

Koshito Fujita

Tetsuya Kaseda

Julian R Koe

Hayato Morigaki

Masumi Saitoh

Katsuya Yamamoto

Naomi Shida

Takahiro Sato

Seiichi Suenaga

Yoshifumi Nishi

Kei Masunishi

Hiroto Honda

Tomohiro Suetsuna

Hiroki Iwanaga

Maki Yonetsu

Akio Amano

Tomoko Eguchi

Koichi Harada

Takashi Yamauchi

Noritsugu Shiokawa

Toshihide Takahashi

Osamu Shibasaki

Tatsuoki Kono

Rikako Kani

Yusuke Handa

Ichiro Tai

Ryosuke Shibata

Takeshi Ogawa

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

According to one embodiment, a gas processing equipment includes an oxygen removerthat removes oxygen contained in exhaust gas G, and a gas processing devicethat processes pretreated exhaust gas G (P), from which the oxygen has been removed by the oxygen remover, with a carbon dioxide absorbent solvent S as a treatment agent.

Gas processing equipment and gas processing method, and carbon dioxide capture system and carbon dioxide capture method

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

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

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.

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.

A carbon dioxide absorbent of an embodiment includes a chain amine, a cyclic amine, and an acid. The chain amine is a compound expressed by Formula (1) of FIG.. Rin Formula (1) is hydrogen or an alkyl chain having at least one hydroxyl group and 1 to 7 carbon atoms. Rin Formula (1) is an alkyl chain having at least one hydroxyl group and 1 to 7 carbon atoms. Rin Formula (1) is hydrogen, a straight alkyl chain having 1 to 7 carbon atoms, a branched alkyl chain having 1 to 7 carbon atoms, or a cyclic alkyl chain having 5 to 7 carbon atoms.

There are provided an acidic gas absorbing agent that is large in recovery amount of an acidic gas. The acidic gas absorbing agent comprising an amine compound represented by general formula (1), and an acidic gas removing method and an acidic gas removing apparatus using the absorbing agent: wherein Rrepresents a cycloalkyl group having 3 to 6 carbon atoms; Rrepresents an alkyl group having 1 to 3 carbon atoms or a hydrogen atom; Rand Reach independently represent an alkyl group having 1 to 3 carbon atoms or a hydrogen atom; and Rrepresents an alkyl group having 1 to 3 carbon atoms.

Acidic gas absorbing agent, method for removing acidic gas and apparatus for removing acidic gas

A carbon dioxide recovery system includes an absorption tower in which carbon dioxide is absorbed into an absorbing solution then the absorbing solution is output to a regeneration tower in which carbon dioxide is released from the absorbing solution. The regeneration tower outputs the absorbing solution from which carbon dioxide has been released and an exhaust gas included released carbon dioxide and water vapor. In a condensing section the exhaust gas is separated into dioxide gas stream and a condensed water stream. In a mixing section the condensed water is mixed with an amine to a replenishment amine aqueous solution in which the amine is dissolved in the condensed water. In a replenishment section the absorbing solution is mixed with the replenishment amine aqueous solution.

Carbon dioxide recovery system and operating method thereof

An acid gas absorbent includes at least one kind of secondary amine compound represented by formula (1): where Ris a cyclopentyl group or a cyclohexyl group which may be substituted by a substituted or non-substituted alkyl group having 1 to 3 carbon atoms, Rand Reach indicate an alkylene group having 2 to 4 carbon atoms, and Rand Rmay each be the same or different, and be a straight chain or have a side chain.

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

There is provided an acidic gas absorbing agent that is large in absorption amount and high in absorption rate of an acidic gas per unit volume and can prevent the diffusion of ingredients of the absorbing agent. The acidic gas absorbing agent includes an amino acid salt of formula 1 or formula 2 and an amine compound of formula 3. wherein COOMe represents a carboxylate group; Me represents an alkali metal. Rand Rrepresent an C1-4 alkylene chain; Rrepresents a cycloalkyl group; Rrepresents a hydrogen atom or an C1-4 alkyl group; and Rrepresents a hydroxyalkyl group.

An acid gas absorbent of which recovery amount of acid gas such as carbon dioxide is high, and an acid gas removal device and an acid gas removal method using the acid gas absorbent are provided. The acid gas absorbent of the embodiment comprising at least one type of tertiary amine compound represented by the following general formula (1). (In the above-stated formula (1), either one of the R, Rrepresents a substituted or non-substituted alkyl group of which carbon number is 2 to 5, and the other one represents a substituted or non-substituted alkyl group of which carbon number is 1 to 5. The Rrepresents a methyl group or an ethyl group, and the Rrepresents a hydroxyalkyl group. The R, Rmay either be the same or different, and they may be coupled to form a cyclic structure.)

Growing community of inventors

Sagamihara, Japan

Shinji Murai