Abstract: A hydrogen refueling system includes a first vessel that stores hydrogen generated by a hydrogen generator, a first compressor that compresses the hydrogen generated by the first vessel, a second vessel that stores the hydrogen compressed by the first compressor, a hydrogen supply valve positioned between the first vessel and the second vessel, and a controller that identifies a pressure of the first vessel based on whether a charging target initiates charging and that the first compressor operates, and controls the hydrogen supply valve to supply the hydrogen from the second vessel to the first vessel, based on whether the pressure of the first vessel is less than or equal to set pressure.

Abstract: The quantum dot comprises a ligand which is a copolymer comprising a first repeating unit comprising at least one or more hole transporting functional groups and a second repeating unit comprising at least one or more photocrosslinking functional groups.

Abstract: A system for pressure swing adsorption including: a plurality of beds each performing at least one of an adsorbing process, a pressure equalizing process, a vacuum process, or a pressurizing process; a supply valve provided in each of the beds and connected to a mixed gas supply unit to supply a mixed gas to the bed; a discharge valve provided in each of the beds and connected to a hydrogen gas discharge unit to discharge hydrogen generated in the bed; a vacuum valve provided in each of the beds and connected to a vacuum pump so as to be open to the vacuum pump during the vacuum process of the bed; and a control unit that controls the supply valve, the discharge valve, and the vacuum valve to allow each of the beds to perform the adsorbing process, the pressure equalizing process, the vacuum process, or the pressurizing process.

Abstract: A fuel reforming apparatus includes a pre-reformer that converts a fuel gas to methane by bringing the fuel gas into a reaction with water, a reformer that generates a mixture gas including hydrogen by bringing the fuel gas pre-reformed by the pre-reformer into a reaction with the water, a reformer burner that supplies heat to the reformer, and an exhaust gas supply line that causes an exhaust gas discharged from the reformer burner to be supplied to the pre-reformer as a heat source for the reaction of the pre-reformer.

Abstract: A raw material gas vaporization system includes: a storage tank for storing raw material gas and a transfer line for transferring the raw material gas; a reforming system including a reformer for producing hydrogen by reacting the raw material gas with water, a burner for applying heat to the reformer, and Pressure Swing Adsorption (PSA) for separating the hydrogen in the mixed gas generated from the reformer; a CO2 separation device for receiving off-gas in which the hydrogen has been removed in the mixed gas from the PSA to remove by liquefying CO2 by exchanging heat with the transfer line of the raw material gas vaporization system; and a gas supply line for supplying the remaining gas in which the CO2 has been removed in the CO2 separation device to a burner as fuel.

Abstract: A hydrogen reforming system includes: a reformer that generates first mixed gas through a reforming reaction between fuel gas and water; a transformer that is fed with the first mixed gas and generates second mixed gas from which carbon monoxide is removed by a water gas shift reaction; a pressure swing adsorption that purifies and separate hydrogen from the second mixed gas generated in the transformer; a heat exchanger that is provided between the reformer and the transformer and between the transformer and the PSA unit to control temperatures of the first mixed gas and the second mixed gas through heat exchange with water; a water feeder that communicates with the heat exchanger and supplies water to the heat exchanger; and a control value that is provided on a line through which water is discharged from the water feeder and adjusts a flow rate of water.

Abstract: LNG reformer system may include a reformer configured for reforming raw material gas including LNG gas and water vapor into hydrogen through a catalytic reaction thereof; a hydrogen PSA extracting the hydrogen in reformed gas produced in the reformer; a CO2 PSA fluidically connected to the hydrogen PSA and configured for extracting carbon dioxide in off-gas discharged from the hydrogen PSA; a first heat exchanger fluidically connected to the CO2 PSA and configured for cooling a fluid including carbon dioxide extracted in the CO2 PSA by LNG supplied from an LNG tank toward the reformer; a CO2 separator fluidically connected to the first heat exchanger and configured for separating the carbon dioxide from a fluid that passed through the first heat exchanger, the fluid including carbon dioxide; and a CO2 tank fluidically connected to the CO2 separator and storing the carbon dioxide separated in the CO2 separator.

Abstract: A liquid natural gas (LNG) reforming system of the present invention may include a reformer provided to receive LNG from an LNG tank; a C02 PSA unit connected to the reformer and configured to extract carbon dioxide from off-gas generated from the reformer; a cooler connected to the C02 PSA unit and configured to cool and liquefy the carbon dioxide extracted by the C02 PSA unit using the LNG supplied from the LNG tank to the reformer; a storage tank connected to the cooler and provided to store liquid carbon dioxide of the cooler therein; and a circulation pump provided to pump the liquid carbon dioxide from the cooler into the storage tank and circulate a part of the liquid carbon oxide into the cooler.

Abstract: Disclosed is a reforming system using an off gas as a cooling medium, which includes: a compressor configured to compress a feed gas; a cooling system a heat exchanger connected to the compressor and configured to cool the feed gas, the temperature of which has been raised in a compression process, by a cooling medium including cooling water; a reformer configured to generate a synthesis gas including hydrogen by reacting the feed gas, which passed through the heat exchanger, with water; a pressure swing adsorption (PSA) unit configured to separate hydrogen from the synthesis gas generated by the reformer and discharge the off gas; and an off gas line configured to feed the off gas discharged from the PSA unit to the heat exchanger such that the heat exchanger utilizes the off gas as the cooling medium.

Abstract: A feed gas reforming system is provided. The system includes a reformer configured to receive feed gas and supply water and to produce and discharge mixed gas including hydrogen, a pressure swing absorber (PSA) configured to receive the mixed gas and to refine and discharge hydrogen gas, a feed gas supply unit configured to control the supply amount of feed gas, a supply water supply unit configured to control the supply amount of supply water, a hydrogen gas supply unit configured to control the amount of hydrogen gas, and a control unit configured to control the flow rate of hydrogen gas, to control the feed gas supply unit based on the pressure of the discharged hydrogen gas, and to control the supply water supply unit based on the flow rate of feed gas.

Abstract: A method of producing hydrogen using biomass includes: pretreating the biomass using an ionic liquid; and extracting hydrogen by reacting the pretreated biomass with an alkaline substance.

Abstract: A system for pressure swing adsorption including: a plurality of beds each performing at least one of an adsorbing process, a pressure equalizing process, a vacuum process, or a pressurizing process; a supply valve provided in each of the beds and connected to a mixed gas supply unit to supply a mixed gas to the bed; a discharge valve provided in each of the beds and connected to a hydrogen gas discharge unit to discharge hydrogen generated in the bed; a vacuum valve provided in each of the beds and connected to a vacuum pump so as to be open to the vacuum pump during the vacuum process of the bed; and a control unit that controls the supply valve, the discharge valve, and the vacuum valve to allow each of the beds to perform the adsorbing process, the pressure equalizing process, the vacuum process, or the pressurizing process.

Abstract: A hydrogen reforming system includes: a reformer that generates first mixed gas through a reforming reaction between fuel gas and water; a transformer that is fed with the first mixed gas and generates second mixed gas from which carbon monoxide is removed by a water gas shift reaction; a pressure swing adsorption that purifies and separate hydrogen from the second mixed gas generated in the transformer; a heat exchanger that is provided between the reformer and the transformer and between the transformer and the PSA unit to control temperatures of the first mixed gas and the second mixed gas through heat exchange with water; a water feeder that communicates with the heat exchanger and supplies water to the heat exchanger; and a control value that is provided on a line through which water is discharged from the water feeder and adjusts a flow rate of water.

Abstract: Disclosed is a reforming system using an off gas as a cooling medium, which includes: a compressor configured to compress a feed gas; a cooling system a heat exchanger connected to the compressor and configured to cool the feed gas, the temperature of which has been raised in a compression process, by a cooling medium including cooling water; a reformer configured to generate a synthesis gas including hydrogen by reacting the feed gas, which passed through the heat exchanger, with water; a pressure swing adsorption (PSA) unit configured to separate hydrogen from the synthesis gas generated by the reformer and discharge the off gas; and an off gas line configured to feed the off gas discharged from the PSA unit to the heat exchanger such that the heat exchanger utilizes the off gas as the cooling medium.

Abstract: A raw material gas vaporization system includes: a storage tank for storing raw material gas and a transfer line for transferring the raw material gas; a reforming system including a reformer for producing hydrogen by reacting the raw material gas with water, a burner for applying heat to the reformer, and Pressure Swing Adsorption (PSA) for separating the hydrogen in the mixed gas generated from the reformer; a CO2 separation device for receiving off-gas in which the hydrogen has been removed in the mixed gas from the PSA to remove by liquefying CO2 by exchanging heat with the transfer line of the raw material gas vaporization system; and a gas supply line for supplying the remaining gas in which the CO2 has been removed in the CO2 separation device to a burner as fuel.