Abstract: According to one embodiment, a carbon dioxide adsorption-desorption device including an electrode that includes a porous composite is provided. The porous composite includes an electro-conductive component and a porous material on the electro-conductive component. The porous material has pores of an angstrom size or a nanometer size, and includes a moiety exhibiting redox activity according to electrical response.

Abstract: According to one embodiment, an amine-containing water concentration system includes an osmotic pressure generator and a carbon dioxide introducing unit. The osmotic pressure generator includes a treatment vessel, a first chamber to which the water to be treated is supplied, a second chamber capable of storing a working medium, and a semipermeable membrane that partitions the first chamber and the second chamber, which are located in the treatment vessel. The carbon dioxide introducing unit is capable of introducing carbon dioxide into the water to be treated.

Abstract: The embodiments provide an eco-friendly carbon dioxide fixation method and a system for carrying out the method. The carbon dioxide fixation method according to the embodiment includes: immersing a magnesium alloy in an aqueous solvent; blowing carbon dioxide-containing gas into the aqueous solvent; and electrically energizing and thereby subjecting the aqueous solvent to electrolysis treatment so as to produce precipitates containing magnesium carbonate. This method can be carried out in a system having: a treating bath for storing a magnesium alloy and an aqueous solvent to treat a magnesium alloy in which said magnesium alloy is treated, a gas-introducing unit for blowing carbon dioxide-containing gas into the aqueous solvent, a pair of electrodes for applying voltage to the aqueous solvent so as to conduct electrolysis treatment, and a power control unit connected to the electrodes.

Abstract: 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.

Abstract: A working medium includes a first amine compound and a second amine compound. The first amine compound is a heterocyclic tertiary amine compound including a carbon atom, a nitrogen atom and a hydrogen atom, and in which a ratio (C/N ratio) of a carbon atom number to a nitrogen atom number included in one molecule is from 7 to 9. The second amine compound is a heterocyclic tertiary amine compound including a carbon atom, a nitrogen atom and a hydrogen atom. and in which a ratio (C/N ratio) of a carbon atom number to a nitrogen atom number included in one molecule is in a range of 5 or more to less than 7.

Abstract: 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° 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.

Abstract: The embodiment provides a composite that allows the release of acid gas, even the continuous release of acid gas, at low temperature and with a high acid-gas release rate in a regeneration tower of an acid gas removal apparatus, and a regenerator and an acid gas removal apparatus, in both of which the composite is used, and a method of acid gas removal. The composite according to the embodiment is capable of separating an acid gas from an acid gas absorbent, which has absorbed the acid gas, to regenerate the acid gas absorbent, wherein the composite contains an inorganic layered compound and an aluminum-containing oxide. Also provided are a regenerator using the composite to regenerate an acid gas absorbent that has absorbed an acid gas by allowing the acid gas absorbent to release the acid gas, and an acid gas removal apparatus equipped with the regenerator.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: According to one embodiment, a working medium is provided. The working medium includes a first amine compound and a second amine compound. The first amine compound is a tertiary amine compound which consists of a carbon atom, a nitrogen atom and a hydrogen atom, and in which a ratio (C/N ratio) of a carbon atom number to a nitrogen atom number included in one molecule is in a range of 7 or more to 9 or less. The second amine compound is a tertiary amine compound which consists of a carbon atom, a nitrogen atom and a hydrogen atom, and in which a ratio (C/N ratio) of a carbon atom number to a nitrogen atom number included in one molecule is in a range of 5 or more to less than 7.

Abstract: 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° 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 R1 to R4 in Formula (1) is H, oxygen double-bonded with carbon of the heterocyclic ring, CH3, OH, or an alkyl chain optionally including a functional group. X1 in Formula (1) is H, CH3, CO, C(O)OC2H5, C(O)OC3H7, C(O)OCH(CH3)2, C(O)OC(CH3)3, C(O)OCH3, C(O)CH3, or C(O)C2H5.

Abstract: The embodiment provides a composite that allows the release of acid gas, even the continuous release of acid gas, at low temperature and with a high acid-gas release rate in a regeneration tower of an acid gas removal apparatus, and a regenerator and an acid gas removal apparatus, in both of which the composite is used, and a method of acid gas removal. The composite according to the embodiment is capable of separating an acid gas from an acid gas absorbent, which has absorbed the acid gas, to regenerate the acid gas absorbent, wherein the composite contains an inorganic layered compound and an aluminum-containing oxide. Also provided are a regenerator using the composite to regenerate an acid gas absorbent that has absorbed an acid gas by allowing the acid gas absorbent to release the acid gas, and an acid gas removal apparatus equipped with the regenerator.

Abstract: This invention provides a prophylactic and therapeutic agent for dry eye, having new ingredients to reduce the deterioration of the lacrimal secretory ability and to inhibit the generation of radical oxygen in lacrimal gland tissue. The prophylactic and therapeutic agent for dry eye of this invention contains the maqui berry extract as the active substance of this invention, i.e. containing delphinidin glycoside extracted from the maqui berry and at least one or more of the active substances delphinidin-3-sambubioside-5-glucoside, delphinidin-3,5-diglucoside, delphinidin-3-sambubioside and delphinidin-3-glucoside, preferably delphinidin-3,5-diglucoside.

Abstract: 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.

Abstract: 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.

Abstract: 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° 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.

Abstract: 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): [In the formula, each R1 is independently hydrogen, an alkyl group, or a primary or secondary amino-containing aminoalkyl group provided that at least one of R1s is the aminoalkyl group, each R2 is independently hydrogen, an alkyl group, hydroxy, amino, hydroxyamino, or a primary or secondary amino-containing aminoalkyl group, the alkyl or aminoalkyl group contained in R1 or R2 has a straight-chain or branched-chain skeleton and may be substituted with hydroxy or carbonyl, and p is 2 to 4.

Abstract: 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° 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 R1 to R4 in Formula (1) is H, oxygen double-bonded with carbon of the heterocyclic ring, CH3, OH, or an alkyl chain optionally including a functional group. X1 in Formula (1) is H, CH3, CO, C(O)OC2H5, C(O)OC3H7, C(O)OCH(CH3)2, C(O)OC(CH3)3, C(O)OCH3, C(O)CH3, or C(O)C2H5.

Abstract: According to one embodiment, a water treatment system includes a first chamber which accommodates water to be treated, a second chamber which accommodates a working medium which induces an osmotic pressure and an osmosis membrane which separates the first chamber and the second chamber from each other. The working medium is an aqueous solution which contains an acid having a hydroxy group in a side chain, or a metal salt thereof.