Process for the production of synthesis gas

Patent metadata

Field	Value
Publication number	US-2023121402-A1
Application number	US-202117800997-A
Country	US
Kind code	A1
Filing date	Mar 1, 2021
Priority date	Mar 3, 2020
Publication date	Apr 20, 2023
Grant date	—

Abstract

A process for producing synthesis gas, the process comprising the steps of a) reforming a hydrocarbon feed in a reforming section thereby obtaining a synthesis gas comprising CH4, CO, CO2, H2 and H2O and impurities comprising ammonia; b) shifting the synthesis gas in a shift section comprising one or more shift steps in series to a shifted synthesis gas; c) separating from the shifted synthesis gas a process condensate originating from cooling and optionally washing of the shifted synthesis gas; d) passing a part of the process condensate to a condensate steam stripper, wherein dissolved shift byproducts comprising ammonia, methanol and amines formed during shifting the synthesis gas are stripped out of the process condensate using steam resulting in a stripper steam stream, e) adding the stripper steam stream from the process condensate steam stripper to the hydrocarbon feed and/or to the synthesis gas downstream the reforming section, up-stream the last shift step, wherein the remaining part of the process condensate is purged.

First claim

1 . A process for producing synthesis gas, the process comprising the steps of
a) reforming a hydrocarbon feed in a reforming section thereby obtaining a synthesis gas comprising CH 4 , CO, CO 2 , H2 and H 2 O and impurities comprising ammonia; b) shifting the synthesis gas in a shift section comprising one or more shift steps in series to a shifted synthesis gas; c) separating from the shifted synthesis gas a process condensate originating from cooling and optionally washing of the shifted synthesis gas; d) passing a part of the process condensate to a condensate steam stripper, wherein dissolved shift byproducts comprising ammonia, methanol and amines formed during shifting the synthesis gas are stripped out of the process condensate using steam resulting in a stripper steam stream, e) adding the stripper steam stream from the process condensate steam stripper to the hydrocarbon feed and/or to the synthesis gas downstream the reforming section, up-stream the last shift step, wherein the remaining part of the process condensate is purged.

2 . Process of claim 1 , wherein the condensate steam stripper is a medium pressure stripper.

3 . Process of claim 1 , wherein the purge is passed to a purge condensate steam stripper.

4 . Process of claim 1 , wherein the purge condensate steam stripper is a low pressure stripper.

5 . Process of claim 3 , wherein steam from the purge condensate steam stripper is condensed and non-condensable gases are employed as fuel.

6 . Process of claim 1 , wherein stripped condensate from step (d) is passed to water treatment.

7 . Process of claim 3 , wherein the stripped purge condensate from the purge condensate steam stripper is passed to water treatment.

Assignees

• Topsoe As

Inventors

• Dahl Per Juul

Classifications

• Y02P20/52

  using catalysts, e.g. selective catalysts · CPC title

• B01D3/38

  Steam distillation · CPC title

• C01B2203/04

  containing a purification step for the hydrogen or the synthesis gas · CPC title

• C01B2203/048

  the impurity being an organic compound · CPC title

• C01B2203/0283

  containing a CO-shift step, i.e. a water gas shift step · CPC title