Intensified pressure swing adsorption system and process cycles
AssigneePraxair Technology, Inc.
InventorsSiew Wah Chai, Yang Luo
Life of this patent
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Abstract
The present invention relates to an intensified 5-bed and 6-bed PSA process cycles features, as well as fast rate adsorbents that enable the intensified PSA system to meet cost and performance target are identified. The proposed capital efficient H2PSA system offers opportunity to reduce PSA capital expenditure by ten percent (10%).
Claims20
A pressure swing adsorption process for producing a gas stream enriched with hydrogen from a feed gas stream utilizing a 5 or 6 adsorbent vessels pressure swing adsorption system, wherein said pressure swing adsorption (PSA) system carries out an efficient process cycle having two pressure equalization steps, no idle step, each pressure equalization and blowdown step being ≥25 seconds, wherein the critical provide purge step is positioned to allow the longest purge time, and the first dedicated provide purge gas is positioned to provide the last purge step for the receiving bed for a clean rinse.
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 six bed adsorption system to produce a continuous stream of product gas enriched in the less strongly adsorbable component and a stream of offgas that is enriched in the strongly adsorbable components, in accordance with to the following cycle chart:
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- 13
- 14
- 15
- 16
- 17
- 18
- B1
- A1
- A2
- A3
- E1
- PPG1
- E2/
- PPG3
- PPG4
- BD
- Pg3a
- Pg4
- Pg2
- Pg3b
- Pg1
- E2′
- E1′
- PP1
- PP2
- PPG2
- B2
- E1′
- PP1
- PP2
- A1
- A2
- A3
- E1
- PPG1
- E2/
- PPG3
- PPG4
- BD
- Pg3a
- Pg4
- Pg2
- Pg3b
- Pg1
- E2′
- PPG2
- B3
- Pg3b
- Pg1
- E2′
- E1′
- PP1
- PP2
- A1
- A2
- A3
- E1
- PPG1
- E2/
- PPG3
- PPG4
- BD
- Pg3a
- Pg4
- Pg2
- PPG2
- B4
- Pg3a
- Pg4
- Pg2
- Pg3b
- Pg1
- E2′
- E1′
- PP1
- PP2
- A1
- A2
- A3
- E1
- PPG1
- E2/
- PPG3
- PPG4
- BD
- PPG2
- B5
- PPG3
- PPG4
- BD
- Pg3a
- Pg4
- Pg2
- Pg3b
- Pg1
- E2′
- E1′
- PP1
- PP2
- A1
- A2
- A3
- E1
- PPG1
- E2/
- PPG2
- B6
- E1
- PPG1
- E2/
- PPG3
- PPG4
- BD
- Pg3a
- Pg4
- Pg2
- Pg1
- Pg1
- E2′
- E1′
- PP1
- PP2
- A1
- A2
- A3
- PPG2
- where:
- A1 = First Adsorption Step
- A2 = Second Adsorption Step
- A3 = Third Adsorption Step
- E1 = First Equalization Down Step
- PPG1 = First Provide Purge Gas Step
- E2/PPG2 = Second Equalization Down/Second Provide Purge Gas Overlapping Step
- PPG3 = Third Provide Purge Gas Step
- PPG4 = Fourth Provide Purge Gas Step
- BD = Blowdown Step
- Pg3a = Third (a) Receive Purge Gas Step
- Pg4 = Fourth Receive Purge Gas Step
- Pg2 = Second Receive Purge Gas Step
- Pg3b = Third (b) Receive Purge Gas Step
- Pg1 = First Receive Purge Gas Step
- E2′ = Second Equalization Up Step
- E1′ = First Equalization Up Step
- PP1 = First Product Pressurization Step
- PP2 = Second Product Pressurization Step.
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 six bed adsorption system to produce a continuous stream of product gas enriched in the less strongly adsorbable component and a stream of offgas that is enriched in the strongly adsorbable components, in accordance with to the following cycle chart:
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- B1
- A1
- A2
- E1
- E2/
- PPG2
- BD
- Pg2a
- Pg1
- Pg2b
- E2′
- E1′
- PP
- PPG1
- B2
- E1′
- PP
- A1
- A2
- E1
- E2/
- PPG2
- BD
- Pg2a
- Pg1
- Pg2b
- E2′
- PPG1
- B3
- Pg2b
- 2
- E1′
- PP
- A1
- A2
- E1
- E2/
- PPG2
- BD
- Pg2a
- Pg1
- PPG1
- B4
- Pg2a
- Pg1
- Pg2b
- E2′
- E1′
- PP
- A1
- A2
- E1
- E2/
- PPG2
- BD
- PPG1
- B5
- PPG2
- BD
- Pg2a
- Pg1
- Pg2b
- 2
- E1′
- PP
- A1
- A2
- E1
- E2/
- PPG1
- B6
- E1
- E2/
- PPG2
- BD
- Pg2a
- Pg1
- Pg2b
- E2′
- E1′
- PP
- A1
- A2
- PPG1
- where:
- A1 = First Adsorption Step
- A2 = Second Adsorption Step
- E1 = First Equalization Down Step
- E2/PPG1 = Second Equalization Down/First Provide Purge Gas Overlapping Step
- PPG2 = Second Provide Purge Gas Step
- BD = Blowdown Step
- Pg2a = Second (a) Receive Purge Gas Step
- Pg1 = First Receive Purge Gas Step
- Pg2b = Second (b) Receive Purge Gas Step
- E2′ = Second Equalization Up Step
- E1′ = First Equalization Up Step
- PP = Product Pressurization Step.
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 adsorption system to produce a continuous stream of product gas enriched in the less strongly adsorbable component and a stream of offgas that is enriched in the strongly adsorbable components, in accordance with to the following cycle chart:
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- 13
- 14
- 15
- B1
- A1
- A2
- A3
- E1
- PPG1
- E2/
- PPG3
- BD
- Pg2
- Pg3
- Pg1
- E2′
- E1′
- PP1
- PP2
- PPG2
- B2
- E1′
- PP1
- PP2
- A1
- A2
- A3
- E1
- PPG1
- E2/
- PPG3
- BD
- Pg2
- Pg3
- Pg1
- E2′
- PPG2
- B3
- Pg3
- Pg1
- E2′
- E1′
- PP1
- PP2
- A1
- A2
- A3
- E1
- PPG1
- E2/
- PPG3
- BD
- Pg2
- PPG2
- B4
- PPG3
- BD
- Pg2
- Pg3
- Pg1
- E2′
- E1′
- PP1
- PP2
- A1
- A2
- A3
- E1
- PPG1
- E2/
- PPG2
- B5
- E1
- PPG1
- E2/
- PPG3
- BD
- Pg2
- Pg3
- Pg1
- E2′
- E1′
- PP1
- PP2
- A1
- A2
- A3
- PPG2
- where:
- A1 = First Adsorption Step
- A2 = Second Adsorption Step
- A3 = Third Adsorption Step
- E1 = First Equalization Down Step
- PPG1 = First Provide Purge Gas Step
- E2/PPG2 = Second Equalization Down/Second Provide Purge Gas Overlapping Step
- PPG3 = Third Provide Purge Gas Step
- BD = Blowdown Step
- Pg2 = Second Receive Purge Gas Step
- Pg3 = Third Receive Purge Gas Step
- Pg1 = First Receive Purge Gas Step
- E2′ = Second Equalization Up Step
- E1′ = First Equalization Up Step
- PP1 = First Product Pressurization Step
- PP2 = Second Product Pressurization Step.
Dependencies are inferred from the claim text.