METHOD FOR HYDROGEN PRODUCTION BY LANDFILL GAS CONVERSION METHOD Russian patent published in 2022 - IPC C01B3/38 C01B3/50 C01B32/50 B01D53/14 B01D53/48 B01D53/52 

FIELD: gas industry.

SUBSTANCE: invention can be used for gas processing and disposal of landfill gas. The method for obtaining hydrogen by landfill gas conversion method includes purification of landfill gas, which consists in the removal of organic sulfur compounds on a cobalt-molybdenum catalyst. Further, the landfill gas that has passed hydro desulfurization is sent to the stage of purification from hydrogen sulfide in an apparatus loaded with zinc oxide. After cleaning from the components poisoning the reformer catalyst, the landfill gas is heated with low-pressure steam to 370 ° C. The heated landfill gas is mixed with high-pressure steam, then it successively passes through the convection coils of the reformer, where it is heated to a temperature of 540°C and then enters the reaction pipes of the hydrocarbon reforming furnace. Primary reforming reactions of steam conversion of methane into hydrogen, carbon monoxide and carbon dioxide take place on a nickel catalyst at 800-860°C. After that, the reaction gas with a temperature of 800-860°C and a pressure of 3.3 MPa is cooled to 300-340°C, then the reaction gas with a temperature of 300-340°С. With a pressure of 2.22 MPa, the carbon monoxide conversion process takes place on an iron-chromium catalyst to obtain converted gas at the outlet with a temperature of up to 420°C and its subsequent cooling. Further, a partial condensate of process water vapor is isolated from the cooled converted gas in the separator. The cooled gas phase is further cooled to 34°C, after which it enters the carbon dioxide absorption monoethanolamine washing unit, where the reaction gas is separated into hydrogen and carbon dioxide.

EFFECT: invention makes it possible to obtain high purity hydrogen from landfill gas at medium- and low-tonnage production scale directly at reclaimed landfills of municipal solid waste.

3 cl, 1 dwg