HYDROGEN PRODUCTION METHOD Russian patent published in 2023 - IPC C01B3/26 C01B3/50 C01B32/50 B01D53/02 B01D53/14 

FIELD: hydrogen production.

SUBSTANCE: hydrogen production method can be used in the petrochemical and gas chemical industries for large-scale production of hydrogen. The hydrogen production method includes increasing the pressure of the feedstock in the form of natural gas using compressor equipment, and/or liquefied hydrocarbon gases (LHG), and/or light gasoline, and/or hydrocarbon mixtures using pumping equipment. The feedstock and the first hydrogen stream are mixed to obtain a feed stream, the feed stream is heated and purified from impurities of sulphur compounds and unsaturated hydrocarbons in a series-connected catalytic hydrogenation reactor and a system of desulfurization reactors. Next, the purified feed stream is mixed with steam, the resulting mixture is heated and fed to the adiabatic preliminary reforming reactor, the resulting reaction mixture is mixed with steam and heated, followed by supply to the steam reforming furnace to produce synthesis gas. The synthesis gas is cooled and fed into the carbon monoxide shift reactor. The converted synthesis gas is cooled and separated with separation of process condensate, the cooled separated synthesis gas is supplied for two-stage purification. At the same time, carbon dioxide is removed using an aqueous solution of potash in an absorber at the first purification stage, followed by absorbent regeneration and drying. At the second stage of purification, carbon monoxide and other impurities are removed in the absorber system. The resulting hydrogen is divided into two streams: the first is sent for mixing with the feedstock before the catalytic hydrogenation reactor, and the second is sent to consumers.

EFFECT: invention makes it possible to increase the yield of hydrogen, reduce the energy and material intensity of production, increase its environmental friendliness, and expand the raw material base.

21 cl, 1 dwg