Ten bed pressure swing adsorption process operating in normal and turndown modes
AssigneePraxair Technology, Inc.
InventorsMohamed S. A. Baksh, Marian Simo
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Abstract
The present invention relates to a ten bed pressure swing adsorption (PSA) system utilizing new and advanced cycles to obtain enhanced hydrogen recovery from a hydrogen containing feed gas (i.e., synthesis gas). More specifically, through the newly developed process cycles, the ten bed PSA system is capable of matching the hydrogen recovery of conventional twelve bed PSA systems designed to manufacture 100 million standard cubic feet per day of gas.
Claims21
A pressure swing adsorption process for separating a pressurized supply feed gas containing one or more strongly adsorbable component from at least one less strongly adsorbable product gas component in a ten bed pressure swing adsorption system to produce a continuous stream of product gas enriched in the less strongly adsorbable component and a continuous stream of offgas that is enriched in strongly adsorbable components, wherein the process cycle has twenty steps including five bed-to-bed equalizations steps, while three of the beds are in production.
A pressure swing adsorption process for separating a pressurized supply feed gas containing one or more strongly adsorbable component from at least one less strongly adsorbable product gas component in a nine bed pressure swing adsorption system to produce a continuous stream of product gas enriched in the less strongly adsorbable component and a continuous stream of offgas that is enriched in strongly adsorbable components, wherein the process cycle has eighteen steps including four bed-to-bed equalizations steps, while three of the beds are in production, in accordance to the following cycle chart:
- Bed
- Step:
- #
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- 13
- 14
- 15
- 16
- 17
- 18
- 1
- A1
- A2
- A3
- A4
- A5
- A6
- E1
- E2
- E3
- E4
- PPG
- BD
- PG
- E4′
- E3′
- E2′
- E1′
- PP
- 2
- E1′
- PP
- A1
- A2
- A3
- A4
- A5
- A6
- E1
- E2
- E3
- E4
- PPG
- BD
- PG
- E4′
- E3′
- E2′
- 3
- E3′
- E2′
- E1′
- PP
- A1
- A2
- A3
- A4
- A5
- A6
- E1
- E2
- E3
- E4
- PPG
- BD
- PG
- E4′
- 4
- PG
- E4′
- E3′
- E2′
- E1′
- PP
- A1
- A2
- A3
- A4
- A5
- A6
- E1
- E2
- E3
- E4
- PPG
- BD
- 5
- PPG
- BD
- PG
- E4′
- E3′
- E2′
- E1′
- PP
- A1
- A2
- A3
- A4
- A5
- A6
- E1
- E2
- E3
- E4
- 6
- E3
- E4
- PPG
- BD
- PG
- E4′
- E3′
- E2′
- E1′
- PP
- A1
- A2
- A3
- A4
- A5
- A6
- E1
- E2
- 7
- E1
- E2
- E3
- E4
- PPG
- BD
- PG
- E4′
- E3′
- E2′
- E1′
- PP
- A1
- A2
- A3
- A4
- A5
- A6
- 8
- A5
- A6
- E1
- E2
- E3
- E4
- PPG
- BD
- PG
- E4′
- E3′
- E2′
- E1′
- PP
- A1
- A2
- A3
- A4
- 9
- A3
- A4
- A5
- A6
- E1
- E2
- E3
- E4
- PPG
- BD
- PG
- E4′
- E3′
- E2′
- E1′
- PP
- A1
- A2
- wherein:
- A1=First Adsorption Step
- A2=Second Adsorption Step
- A3=Third Adsorption Step
- A4=Fourth Adsorption Step
- A5=Fifth Adsorption Step
- A6=Sixth Adsorption Step
- E1=First Equalization Down
- E2=Second Equalization Down
- E3=Third Equalization Down
- E4=Fourth Equalization Down
- PPG=Provide Purge Gas
- BD=Blowdown
- PG=Purge using gas from PPG step
- E4′=Equalization Up (using gas from E4 step)
- E3′=Equalization Up (using gas from E3 step)
- E2′=Equalization Up (using gas from E2 step
- E1′=Equalization Up (using gas from E1 step)
- PP=Product Pressurization.
A pressure swing adsorption process for separating a pressurized supply feed gas containing one or more strongly adsorbable component from at least one less strongly adsorbable product gas component in a eight bed pressure swing adsorption system to produce a continuous stream of product gas enriched in the less strongly adsorbable component and a continuous stream of offgas that is enriched in strongly adsorbable components, wherein the process cycle has sixteen steps including three bed-to-bed equalizations steps, while three of the beds are in production.
A pressure swing adsorption process for separating a pressurized supply feed gas containing one or more strongly adsorbable component from at least one less strongly adsorbable product gas component in a seven bed pressure swing adsorption system to produce a continuous stream of product gas enriched in the less strongly adsorbable component and a continuous stream of offgas that is enriched in strongly adsorbable components, wherein the process cycle has twenty one steps including three bed-to-bed equalizations steps, while two of the beds are in production, in accordance to the following cycle chart:
- Bed
- Step:
- #
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 1
- A1
- A2
- A3
- A4
- A5
- A6
- E1
- E1
- E2
- PPG1
- E3
- 2
- E1′
- E1′
- PP
- A1
- A2
- A3
- A4
- A5
- A6
- E1
- E1
- 3
- PG1
- E3′
- E2′
- E1′
- E1′
- PP
- A1
- A2
- A3
- A4
- A5
- 4
- BD1
- BD2
- PG2
- PG1
- E3′
- E2′
- E1′
- E1′
- PP
- A1
- A2
- 5
- PPG1
- E3
- PPG2
- BD1
- BD2
- PG2
- PG1
- E3′
- E2′
- E1′
- E1′
- 6
- E1
- E1
- E2
- PPG1
- E3
- PPG2
- BD1
- BD2
- PG2
- PG1
- E3′
- 7
- A4
- A5
- A6
- E1
- E1
- E2
- PPG1
- E3
- PPG2
- BD1
- BD2
- Bed
- Step:
- #
- 12
- 13
- 14
- 15
- 16
- 17
- 18
- 19
- 20
- 21
- 1
- PPG2
- BD1
- BD2
- PG2
- PG1
- E3′
- E2′
- E1′
- E1′
- PP
- 2
- E2
- PPG1
- E3
- PPG2
- BD1
- BD2
- PG2
- PG1
- E3′
- E2′
- 3
- A6
- E1
- E1
- E2
- PPG1
- E3
- PPG2
- BD1
- BD2
- PG2
- 4
- A3
- A4
- A5
- A6
- E1
- E1
- E2
- PPG1
- E3
- PPG2
- 5
- PP
- A1
- A2
- A3
- A4
- A5
- A6
- E1
- E1
- E2
- 6
- E2′
- E1′
- E1′
- PP
- A1
- A2
- A3
- A4
- A5
- A6
- 7
- PG2
- PG1
- E3′
- E2′
- E1′
- E1′
- PP
- A1
- A2
- A3
- where:
- A1=First Adsorption Step
- A2=Second Adsorption Step
- A3=Third Adsorption Step
- A4=Fourth Adsorption Step
- A5=Fifth Adsorption Step
- A6=Sixth Adsorption Step
- E1=First Equalization Down
- E2=Second Equalization Down
- PPG1=First Provide Purge Gas Step
- E3=Third Equalization Down
- PPG2=Second Provide Purge Gas Step
- BD1=First Blowdown
- BD2=Second Blowdown
- PG2=Purge step using gas from PPG2 Step
- PG1=Purge step using gas from PPG1 Step
- E3′=Equalization Up (using gas from E3 step)
- E2′=Equalization Up (using gas from E2 step)
- E1′=Equalization Up (using gas from E1 step)
- PP=Product Pressurization.
A pressure swing adsorption process for separating a pressurized supply feed gas containing one or more strongly adsorbable component from at least one less strongly adsorbable product gas component in a five bed pressure swing adsorption system to produce a continuous stream of product gas enriched in the less strongly adsorbable component and a continuous stream of offgas that is enriched in strongly adsorbable components, wherein the process cycle has fifteen steps including two bed-to-bed equalizations steps, while two of the beds are in production.
A pressure swing adsorption process for separating a pressurized supply feed gas containing one or more strongly adsorbable component from at least one less strongly adsorbable product gas component in a ten bed pressure swing adsorption system to produce a continuous stream of product gas enriched in the less strongly adsorbable component and a continuous stream of offgas that is enriched in strongly adsorbable components, wherein the process cycle has twenty steps including five bed-to-bed equalizations steps, while two of the beds are in production.
A pressure swing adsorption process for separating a pressurized supply feed gas containing one or more strongly adsorbable component from at least one less strongly adsorbable product gas component in a ten bed pressure swing adsorption system to produce a continuous stream of product gas enriched in the less strongly adsorbable component and a continuous stream of offgas that is enriched in strongly adsorbable components, wherein the process cycle has twenty steps including four bed-to-bed equalizations steps, while three of the beds are in production, in accordance to the following cycle chart:
- Bed
- Step:
- #
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- 13
- 14
- 15
- 16
- 17
- 18
- 19
- 20
- 1
- A1
- A2
- A3
- A4
- A5
- A6
- E1
- E2
- E3
- E4
- PPG1
- PPG2
- BD
- PG2
- PG1
- E4′
- E3′
- E2′
- E1′
- PP
- 2
- E1′
- PP
- A1
- A2
- A3
- A4
- A5
- A6
- E1
- E2
- E3
- E4
- PPG1
- PPG2
- BD
- PG2
- PG1
- E4′
- E3′
- E2′
- 3
- E3′
- E2′
- E1′
- PP
- A1
- A2
- A3
- A4
- A5
- A6
- E1
- E2
- E3
- E4
- PPG1
- PPG2
- BD
- PG2
- PG1
- E4′
- 4
- PG1
- E4′
- E3′
- E2′
- E1′
- PP
- A1
- A2
- A3
- A4
- A5
- A6
- E1
- E2
- E3
- E4
- PPG1
- PPG2
- BD
- PG2
- 5
- BD
- PG2
- PG1
- E4′
- E3′
- E2′
- E1′
- PP
- A1
- A2
- A3
- A4
- A5
- A6
- E1
- E2
- E3
- E4
- PPG1
- PPG2
- 6
- PPG1
- PPG2
- BD
- PG2
- PG1
- E4′
- E3′
- E2′
- E1′
- PP
- A1
- A2
- A3
- A4
- A5
- A6
- E1
- E2
- E3
- E4
- 7
- E3
- E4
- PPG1
- PPG2
- BD
- PG2
- PG1
- E4′
- E3′
- E2′
- E1′
- PP
- A1
- A2
- A3
- A4
- A5
- A6
- E1
- E2
- 8
- E1
- E2
- E3
- E4
- PPG1
- PPG2
- BD
- PG2
- PG1
- E4′
- E3′
- E2′
- E1′
- PP
- A1
- A2
- A3
- A4
- A5
- A6
- 9
- A5
- A6
- E1
- E2
- E3
- E4
- PPG1
- PPG2
- BD
- PG2
- PG1
- E4′
- E3′
- E2′
- E1′
- PP
- A1
- A2
- A3
- A4
- 10
- A3
- A4
- A5
- A6
- E1
- E2
- E3
- E4
- PPG1
- PPG2
- BD
- PG2
- PG1
- E4′
- E3′
- E2′
- E1′
- PP
- A1
- A2
- where:
- A1=First Adsorption Step
- A2=Second Adsorption Step
- A3=Third Adsorption Step
- A4=Fourth Adsorption Step
- A5=Fifth Adsorption Step
- A6=Sixth Adsorption Step
- E1=First Equalization Down
- E2=Second Equalization Down
- E3=Third Equalization Down
- E4=Fourth Equalization Down
- PPG1=First Provide Purge Gas Step
- PPG2=Second Provide Purge Gas Step
- BD=Blowdown
- PG2=Purge step using gas from PPG2 step
- PG1=Purge step using gas from PPG1 step
- E4′=Equalization Up (using gas from E4 step)
- E3′=Equalization Up (using gas from E3 step)
- E2′=Equalization Up (using gas from E2 step)
- E1′=Equalization Up (using gas from E1 step)
- PP=Product Pressurization.
A pressure swing adsorption process for separating a pressurized supply feed gas containing one or more strongly adsorbable component from at least one less strongly adsorbable product gas component in a nine bed pressure swing adsorption system to produce a continuous stream of product gas enriched in the less strongly adsorbable component and a continuous stream of offgas that is enriched in strongly adsorbable components, wherein the process cycle has eighteen steps including four bed-to-bed equalizations steps, while two of the beds are in production.
Dependencies are inferred from the claim text.