Abstract: A method of capturing an acid gas includes: an adsorption step; a desorption step; and a cooling step in the stated order. In the adsorption step, an acid gas is caused to be adsorbed to an acid gas adsorption material by supplying a gas to be treated containing the acid gas to an acid gas adsorption device including the acid gas adsorption material. In the desorption step, the acid gas is caused to be desorbed from the acid gas adsorption material by heating the acid gas adsorption device. In the cooling step, the acid gas adsorption device is cooled with a cooling medium having a temperature less than an outside air temperature.

Abstract: An acid gas capture system includes: a plurality of acid gas adsorption devices each including an acid gas adsorption material; and a fluid supply line. The fluid supply line allows distribution and supply of a fluid to the plurality of acid gas adsorption devices. The fluid supply line includes a branching portion and a plurality of flow dividing portions. The plurality of flow dividing portions each connect the branching portion and each of the plurality of acid gas adsorption devices to each other. A resistor is provided to each of the plurality of flow dividing portions.

Abstract: A method of capturing an acid gas includes an adsorption step and a desorption step. In the desorption step, the acid gas is caused to be desorbed from the acid gas adsorption material by heating the acid gas adsorption device. The desorption step includes a first desorption step and a second desorption step after at least the first desorption step. In the first desorption step, a first desorption gas is supplied to the acid gas adsorption device so that an acid gas desorbed from the acid gas adsorption material is captured together with the first desorption gas. In the second desorption step, a second desorption gas with lower humidity than humidity of the first desorption gas is supplied to the acid gas adsorption device so that an acid gas desorbed from the acid gas adsorption material is captured together with the second desorption gas.

Abstract: A acid gas adsorption device includes acid gas-adsorbable particles and an organic binder. The acid gas-adsorbable particles are each capable of adsorbing an acid gas. The organic binder is capable of binding the acid gas-adsorbable particles. The organic binder is soluble in an aprotic polar solvent and is substantially insoluble in a protic polar solvent.

Abstract: An acid gas adsorption device includes a first adsorption portion and a second adsorption portion. The second adsorption portion is arranged on a downstream side of the first adsorption portion in a direction of passage of a target gas to be treated so as to be spaced apart from the first adsorption portion. The first adsorption portion includes first flow passages, and the second adsorption portion includes second flow passages. A first desorption gas flow passage communicating with the first flow passages and the second flow passages is defined between the first adsorption portion and the second adsorption portion in the direction of passage of the target gas to be treated.

Abstract: A method of producing a liquid fuel includes: causing a raw material gas containing at least a carbon oxide and hydrogen to flow into a reactor storing a catalyst; and producing the liquid fuel from the raw material gas through a conversion reaction in the presence of the catalyst. The raw material gas further contains oxygen. The ratio of the concentration of carbon monoxide to the concentration of carbon dioxide in the carbon oxide is 0.9 or less.

Abstract: A liquid fuel production system includes: a liquid fuel-synthesizing portion configured to advance a conversion reaction from a raw material gas containing at least hydrogen and a carbon oxide to a liquid fuel; a raw material gas-supplying portion configured to supply the raw material gas to the liquid fuel-synthesizing portion; and a raw material gas-circulating portion configured to resupply a remaining raw material gas, which contains the hydrogen and the carbon oxide that are unreacted, and an acidic by-product of the conversion reaction, from the liquid fuel-synthesizing portion to the raw material gas-supplying portion, wherein the raw material gas-supplying portion includes a mixing portion configured to mix an amine compound and the remaining raw material gas in the presence of water vapor, and a moisture-removing portion configured to remove a neutralized product of the amine compound and the acidic by-product together with condensed water of the water vapor.

Abstract: A liquid fuel production system including: a gas-adsorbing/desorbing portion; a heating medium-supplying portion configured to supply, to the gas-adsorbing/desorbing portion, a heating medium for heating the gas-adsorbing/desorbing portion; a liquid fuel-synthesizing portion including a first gas flow path storing a catalyst that advances a conversion reaction from a raw material gas to a liquid fuel, and a second gas flow path through which a temperature-controlling gas that controls a temperature of the first gas flow path is flowed, the liquid fuel-synthesizing portion being configured to flow a first outflow gas out of the first gas flow path, and to flow a second outflow gas out of the second gas flow path; and a heat exchanger configured to perform heat exchange between the second outflow gas and the heating medium to heat the heating medium. The second outflow gas contains a condensable gas.

Abstract: A method of producing a liquid fuel includes: causing a raw material gas containing at least a carbon oxide and hydrogen to flow into a reactor storing a catalyst; and producing the liquid fuel from the raw material gas through a conversion reaction in the presence of the catalyst. The raw material gas further contains an inert gas. A ratio of a concentration of carbon monoxide to a concentration of carbon dioxide in the carbon oxide is 0.9 or less.

Abstract: A liquid fuel production system including: a gas-adsorbing/desorbing portion; a heating medium-supplying portion configured to supply, to the gas-adsorbing/desorbing portion, a heating medium for heating the gas-adsorbing/desorbing portion; a liquid fuel-synthesizing portion including a first gas flow path storing a catalyst that advances a conversion reaction from a raw material gas to a liquid fuel, and a second gas flow path through which a temperature-controlling gas that controls a temperature of the first gas flow path is flowed, the liquid fuel-synthesizing portion being configured to flow a first outflow gas out of the first gas flow path, and to flow a second outflow gas out of the second gas flow path; and a heat exchanger configured to perform heat exchange between the first outflow gas and the heating medium to heat the heating medium. The first outflow gas contains a condensable gas.

Abstract: A method of regenerating an acid gas adsorption device includes the steps of: causing an acid gas to be adsorbed to an acid gas adsorption material by supplying the acid gas to an acid gas adsorption device so that the acid gas is brought into contact with an acid gas adsorption layer; causing the acid gas to be desorbed from the acid gas adsorption material; pulverizing the acid gas adsorption device, which has been subjected to the step of causing the acid gas to be adsorbed and the step of causing the acid gas to be desorbed, to provide a regenerated material powder; and molding a base material from the regenerated material powder to form an acid gas adsorption layer including an acid gas adsorption material on a surface of the base material.

Abstract: A method of regenerating an acid gas adsorption device includes the steps of: causing an acid gas to be adsorbed to an acid gas adsorption material by supplying the acid gas to an acid gas adsorption device so that the acid gas is brought into contact with an acid gas adsorption layer; causing the acid gas to be desorbed from the acid gas adsorption material; and causing an acid gas adsorption material to adhere to the acid gas adsorption layer of the acid gas adsorption device, which has been subjected to the step of causing the acid gas to be adsorbed and the step of causing the acid gas to be desorbed, by supplying the acid gas adsorption material thereto.

Abstract: A method of regenerating an acid gas adsorption device includes the steps of: causing an acid gas to be adsorbed to an acid gas adsorption material by supplying a gas including the acid gas to an acid gas adsorption device so that the gas is brought into contact with an acid gas adsorption layer; causing the acid gas to be desorbed from the acid gas adsorption material; removing the acid gas adsorption layer of the acid gas adsorption device, which has been subjected to the step of causing the acid gas to be adsorbed and the step of causing the acid gas to be desorbed, from a surface of a base material; and forming an acid gas adsorption layer including a porous carrier and an acid gas adsorption material on the surface of the base material from which the acid gas adsorption layer has been removed.

Abstract: There is disclosed a filter inspection method which is excellent in sensitivity to detect defects of a filter and in operation efficiency. The filter inspection method includes a humidifying step of exposing a porous filter to moisture-containing air; and a detecting step of introducing water particles into the filter in a wet state through the humidifying step, to detect the water particles which pass through and flow out of the filter, thereby detecting defects of the filter.

Abstract: There is disclosed a filter inspection method which is excellent in sensitivity to detect defects of a filter and in operation efficiency. The filter inspection method includes a humidifying step of exposing a porous filter to moisture-containing air; and a detecting step of introducing water particles into the filter in a wet state through the humidifying step, to detect the water particles which pass through and flow out of the filter, thereby detecting defects of the filter.