METHOD FOR PRODUCING HYDROGEN FROM NATURAL GAS Russian patent published in 2022 - IPC C01B3/36 C01B3/48 C01B3/50 

FIELD: energy, chemical, oil and gas industries.

SUBSTANCE: invention can be used in the production of hydrogen in the energy, chemical, oil and gas industries. To produce hydrogen, natural gas is mixed with hydrogen, heated in the first heat exchanger, and sent to the desulfurizer reactor. The natural gas is then separated into two streams. One stream is sent to the burner, and the other is mixed with steam, after which the vapor-gas mixture is heated in the second and third heat exchangers and subjected to steam reforming of hydrocarbons in the first reactor. The converted gas is fed into the steam generator and catalytic conversion of carbon monoxide is carried out in the second reactor. The resulting synthesis gas is cooled in the first and fourth heat exchangers. Hydrogen is extracted from the synthesis gas, water condensate, which is sent to the water treatment system, from which water is taken and heated in the fourth and fifth heat exchangers, then fed to the steam generator for evaporation, and tail gas, which is heated in the sixth heat exchanger and fed to burner together with natural gas and air, which is heated in the seventh heat exchanger. The combustion products are cooled in the third, fifth heat exchangers, the first reactor, as well as the second, seventh and sixth heat exchangers, and then sent to the flue gas neutralization system, as it exits, the combustion products are released into the atmosphere and water condensate is supplied to the water treatment system. At the same time, synthesis gas is cooled in the hydrogen evolution system and combustion products in the flue gas neutralization system using a refrigerant, which is sequentially fed into the hydrogen evolution system, then into the flue gas neutralization system, then into the coolant heat removal system, after which it is sent back to hydrogen extraction system.

EFFECT: invention makes it possible to reduce operating costs for heating and cooling working media, improve environmental friendliness and energy efficiency of the process.

3 cl, 1 dwg