Abstract: The present embodiment provides an acid gas absorbent producing less waste and having a low environmental load, a method for removing an acid gas using the acid gas absorbent, and an acid gas removal apparatus. In the acid gas absorbent according to the present embodiment, a solubility in water of a salt formed from a liquid amine compound and the acid gas is higher than a solubility in water of the liquid amine compound. Further, the amine compound and water are separated into two phases before absorption of the acid gas or after desorption thereof, and, in this state, the acid gas absorbent is easily separated from water-soluble impurities and purified.

Abstract: According to one embodiment, a carbon dioxide adsorbent is provided. The carbon dioxide adsorbent is capable of adsorbing and desorbing carbon dioxide and has a fused heteroaromatic ring structure that includes one or more quinone structures.

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 present embodiments provide an acid gas absorbent, a method for removing an acid gas, and an acid gas removal apparatus. The acid gas absorbent comprises (A) a specific diamine compound, (B) amine compound and (C) a solvent, wherein a B/A ratio of a content rate of the component (B) to a content rate of the component (A) is 2.5 to 15.

Abstract: A water treatment system according to an embodiment includes an element that introduces treated water into a first container, an element that introduces an amine solution into the first container to obtain a first mixture, an element that separates a supernatant phase and a concentrated phase of a second mixture in which the first mixture is phase-separated. The amine solution includes one or more tertiary amine compounds represented by a chemical formula (1) or/and a chemical formula (2). R1 in the chemical formula (1) is a linear alkyl chain having 2 or more and 4 or less carbon atoms. R2 in the chemical formula (2) is a linear alkyl chain having 2 or more and 4 or less carbon atoms. R3 in the chemical formula (2) is a linear alkyl group having 1 or more and 4 or less carbon atoms or a branched alkyl group having 3 or 4 carbon atoms. R4 in the chemical formula (2) is a linear alkyl group having 1 or more and 4 or less carbon atoms or a branched alkyl group having 3 or 4 carbon atoms.

Abstract: According to one embodiment, a carbon dioxide adsorbent is provided. The carbon dioxide adsorbent is capable of adsorbing and desorbing carbon dioxide and includes one or more cyclic disulfide structures.

Abstract: A molecular sensor of an embodiment includes a sensitive film including a plurality of metal organic framework particles, and a detector configured to be capable of measuring a change in physical quantity due to adsorption of a target molecule to the sensitive film. Pores are present between the plurality of metal organic framework particles, and the pores are any of mesopores of 2 nm or more and 50 nm or less, micropores smaller than the mesopores, and macropores larger than the mesopores. A sum of areas of the micropores is defined as Smi, a sum of areas of the mesopores is defined as Sme, a sum of areas of the macropores is defined as Sma, and an area of an entire image analysis area is defined as Stotal, in an image analysis area by two-dimensional image analysis on a cross section of the sensitive film in a thickness direction. Pore distribution satisfies 0.35?Sme/(Smi+Sme+Sma), 0.01?Smi+Sme+Sma)/Stotal?0.5.

Abstract: A molecular sensor includes: a base; and a sensitive film provided above the base and containing a metal organic framework and a hydrophobic polymer, a contact angle respect to water of the hydrophobic polymer being larger than that of the metal organic framework. The metal organic framework is on the base side of the sensitive film, and the hydrophobic polymer is above the metal organic framework in the sensitive film.

Abstract: According to one embodiment, a molecular sensor contains a sensitive film in which a porous member and an ionic liquid coexist. The molecular sensor is capable of detecting a target molecule by measuring a change in physical quantity of the sensitive film due to adsorption of the target molecule to the sensitive film.

Abstract: Embodiments provide an amine compound having a large amount of an acid gas to be absorbed and strong oxidation resistance, an absorbent containing the amine compound, a method for removing an acid gas, and an acid gas removal apparatus. The acid gas absorbent includes an amine compound of Formula (1a) or (2b): wherein: R1 to R3 are each independently a hydrogen alkyl group, R2's are each independently an alkyl group, and at least two of R2's contained in one-CR23 are not hydrogen, a's are each independently 0 or 1, m is a number of 1 to 3; n's are each independently a number of 1 to 4.

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: A molecular detection apparatus includes a detector. The detector includes: a vibrator having a piezoelectric member that has a first surface and a second surface, a first electrode connected to the first surface, a second electrode connected to the second surface, and a third electrode connected to the second surface and disconnected from the second electrode; a sensitive film overlapping at least one part of the second electrode and at least one part of the third electrode and configured to change a vibration frequency of the vibrator in response to an interaction with target molecules; and a detection electrode to detect the changed vibration frequency.

Abstract: According to one embodiment, an information processing apparatus comprises a processor. The processor is configured to receive a first number of outputs from the first number of sensors mutually different in response to an odor, obtain a second number of indicators by using the first number of outputs from the first number of sensors, the second number being larger than the first number, obtain the second number of indicator values by using the first number of outputs and the second number of indicators, and discriminate the odor based on the second number of indicator values.

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: 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 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 molecular sensor contains a sensitive film in which a porous member and an ionic liquid coexist. The molecular sensor is capable of detecting a target molecule by measuring a change in physical quantity of the sensitive film due to adsorption of the target molecule to the sensitive film.

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.