Removal and recovery of compressed CO₂ from flue gas by a novel thermal swing chemisorption process

A synopsis of the published literature on removal of CO₂ from a flue gas is given. A novel thermal swing chemisorption (TSC) process concept is proposed for removal and recovery of compressed CO₂ from a flue gas without precompression, predrying, or precooling. The process uses Na₂O promoted alumina...

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Bibliographic Details
Published in:AIChE journal 2008-09, Vol.54 (9), p.2293-2302
Main Authors: Lee, K.B, Sircar, S
Format: Article
Language:English
Subjects:
Applied sciences
Atmospheric pollution
carbon dioxide
Chemical engineering
chemisorption
compression
Exact sciences and technology
flue gas
General processes of purification and dust removal
Pollution
Prevention and purification methods
promoted alumina
removal
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Summary:A synopsis of the published literature on removal of CO₂ from a flue gas is given. A novel thermal swing chemisorption (TSC) process concept is proposed for removal and recovery of compressed CO₂ from a flue gas without precompression, predrying, or precooling. The process uses Na₂O promoted alumina as a reversible CO₂ selective chemisorbent in conjunction with the principles of rapid thermal swing adsorption for direct production of compressed CO₂ from a flue gas. Several complementary process steps are used in the design to compress the product CO₂ and to achieve high CO₂ recovery and sorbent capacity utilization. Judicious steam purge steps are used for highly efficient sorbent regeneration and to minimize the steam requirement. The CO₂ chemisorption characteristics of the sorbent are reviewed and a model simulation of the TSC process performance is reported. © 2008 American Institute of Chemical Engineers AIChE J, 2008
ISSN:0001-1541
1547-5905
DOI:10.1002/aic.11531