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Improvements in cyclical swing absorption processes

Inactive Publication Date: 2009-10-28
AIR PROD & CHEM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0022] None of these prior art methods allow for automatic control of swing adsorption whereby the completion time of adsorbent bed regeneration can be varied by on-line displacement of the operating bed by the regenerated bed to match the completion time of simultaneous adsorption

Method used

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  • Improvements in cyclical swing absorption processes
  • Improvements in cyclical swing absorption processes
  • Improvements in cyclical swing absorption processes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] Example 1: TPSA cycle (as described in US Patent No. 5,855,650)

[0083] CO in raw materials 2 reduced ordinary

[0084] design example

[0085] Operation case

[0086] Container diameter (mm) 6000 6000

[0087] Container Tan-Tan length (mm) 3006 3006

[0088] Raw material temperature (°C) 18.3 18.3

[0089] Raw material pressure (MPa) 0.6 0.6

[0090] Raw material CO 2 (ppm) 1000 400

[0091] Raw water (ppm) 3602 3602

[0092] Total raw material flow rate (kmol / hr) 5928 5928

[0093] Running time (hr) 3.07 5

[0094] Regeneration time (hr) 2.57 4.5

[0095] Mass of alumina (kg) 26958 26958

[0096] Mass of 13X (kg) 22869 22869

[0097] Regeneration temperature (℃) 200 200

[0098] Required regeneration flow (kmol / hr) 1121 735

[0099] Pressure drop in feed step (kPa) 14.6 14.6

[0100] Pressure drop in regeneration step (kPa) 12.3 6.17

[0101] Compression power required to overcome pressure drop 321 229

[0102] (kW)

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Abstract

The concentration of adsorbate in the feed gas (1) to an on-stream bed (13) of a cyclical swing adsorption process is monitored (35) and the data processed (33) to predict the time required to complete the on-stream mode of that bed and the purge (27) flow rate and / or other regeneration mode operating condition (28) of the concurrently off-stream bed (14) is modified in response to changes in said predicted time whereby the regeneration mode of the off-steam bed is completed at the same time as the on-stream mode of the concurrent on-stream bed.

Description

technical field [0001] The present invention relates to a cyclical swing adsorption process for the separation of feed gas mixtures. The term "separation" as used in this specification includes the removal of contaminants and / or impurities from a gas stream, which can then be further separated. The invention has particular, but not exclusive application to removing carbon dioxide in a feed gas or at least reducing the level of carbon dioxide in a feed gas to render the feed gas suitable for downstream processing. The invention is particularly useful for removing carbon dioxide from air to be used as feed gas in cryogenic separation or purification processes of air. Background technique [0002] Carbon dioxide is a relatively high-boiling gaseous species, and its removal, along with other high-boiling species such as water that may be present in the feed gas, is necessary if the mixture is to be subsequently processed in a low-temperature (eg, freezing) process. If relative...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/04C01B31/20C01B32/50
CPCB01D2257/504Y02C10/08B01D2259/402B01D53/0462B01D2259/4146B01D2259/40086B01D2259/40009B01D53/047Y02C20/40B01D53/00
Inventor A·D·怀特M·A·卡尔巴西T·C·戈尔登C·J·赖斯维尔
Owner AIR PROD & CHEM INC
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