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AssigneePraxair Technology, Inc.
InventorsShrikar Chakravarti, Ines C. Stuckert
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A method and system for producing hydrogen using an oxygen transport membrane based reforming system is disclosed. The system of the invention comprises at least two reactors in the form of sets of catalyst containing tubes: a first set of tubes comprising at least one reforming catalyst containing reforming reactor configured to produce a synthesis gas stream, and a second set of tubes comprising a reactively driven and catalyst containing oxygen transport membrane reactor configured to generate and radiate heat to the reforming reactor. The synthesis gas product is further treated in a separate high temperature water gas shift reactor and optionally in a separate low temperature water gas shift reactor. Hydrogen is produced from the resulting hydrogen-enriched gas using hydrogen PSA. A distinctive feature of this OTM configuration is that no portion of the syngas is fed to the OTM reactor, which allows reforming to be conducted in the reforming reactors at much higher pressures. The synthesis gas stream is directed to the water gas shift (WGS) reactor where H2/CO ratio increases from about 4.7 to about 21. Since the WGS reaction is exothermic, the shifted syngas leaves the reactor at a higher temperature, typically about 410° C. This shifted syngas is used to heat the NG feedstock in the NG heater to about 370° C., and then used to preheat boiler feed water (BFW). Syngas leaving the BFW heater is at about 175° C. It is cooled down to about 40° C. in a syngas cooler fed by cooling water. The cooled syngas then enters a knock-out drum where water is removed from the bottoms as process condensate and recycled for use within the process.
A method for hydrogen production utilizing an oxygen transport membrane based reforming system, wherein said system comprises at least one reforming reactor and at least one oxygen transport membrane reactor in close proximity to said at least one reforming reactor, the method comprising the steps of:
A hydrogen production system comprising:
A method for hydrogen production utilizing an oxygen transport membrane based reforming system, said system comprising at least one reforming reactor and at least one oxygen transport membrane reactor in close proximity to said at least one reforming reactor, the method comprising the steps of:
Dependencies are inferred from the claim text.