Abstract: Disclosed is an apparatus for producing a hydrogen gas according to the present disclosure includes a desulfurizer, a plasma reactor, a first adsorber, and a heat exchanger. The disclosed apparatus does not require additional purification of hydrogen and has excellent energy efficiency by utilizing wasted heat of the produced hydrogen.

Abstract: Disclosed is an apparatus for producing a hydrogen gas, the apparatus including a desulfurizer that desulfurizes a hydrocarbon containing gas, a plasma reactor that generates the hydrogen containing gas from the desulfurized hydrocarbon containing gas through plasma based pyrolysis, a separator that separates a hydrogen gas from the hydrogen containing gas, and a heat exchanger that exchanges heat between at least one of the hydrocarbon containing gas at a front end of the desulfurizer and the desulfurized hydrocarbon containing gas at a rear end of the desulfurizer, the hydrogen gas being separated by the separator.

Abstract: Disclosed is an apparatus for producing a hydrogen gas according to the present disclosure includes a desulfurizer, a plasma reactor, a separator, a first heat exchanger, a second heat exchanger, and a first adsorber, and circulates at least a portion of a first off gas to the plasma reactor again.

Abstract: A cooler installed to cool NG supplied from a compressor to a pyrolysis reactor and configured to independently use multiple refrigerants is provided; a first refrigerant supply device provided to supply a first refrigerant for the cooler; and a second refrigerant supply device configured to supply, to the cooler, a fuel gas for a burner, including an off-gas and NG which has not passed through the compressor, as a second refrigerant for 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: 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.