AMMONIA PROCESS USING ADVANCED SHIFT PROCESS

A process for producing an ammonia synthesis gas, said process comprising the steps of: -Reforming a hydrocarbon feed in a reforming step thereby obtaining a synthesis gas comprising CH4, CO, CO2, H2 and H2O, -Shifting the synthesis gas in one in or more shift steps in series, -Optionally wash the s...

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Bibliographische Detailangaben
Hauptverfasser: ANNETTE E KRØLL JENSEN, NIELS CHRISTIAN SCHJØDT, CHRISTIAN HENRIK SPETH, MARCUS SYMRENG, PER JUUL DAHL
Format: Patent
Sprache:eng
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Zusammenfassung:A process for producing an ammonia synthesis gas, said process comprising the steps of: -Reforming a hydrocarbon feed in a reforming step thereby obtaining a synthesis gas comprising CH4, CO, CO2, H2 and H2O, -Shifting the synthesis gas in one in or more shift steps in series, -Optionally wash the synthesis gas leaving the shift section with water, -Sending the process condensate originating from cooling and washing the synthesis gas leaving the shift section to a process condensate stripper wherein the dissolved shift byproducts and dissolved gases are stripped out of the process condensate using steam resulting in a steam stream containing more than 99% of the dissolved methanol in process condensate. -Adding all or part of said steam stream from the process condensate stripper to the synthesis gas downstream the reforming step, prior to the last shift step, wherein -The steam/carbon ratio in the reforming step and the shift step is less than 2.6.