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Analysis of Energetics and Economics of Sub-ambient Hybrid Post-Combustion CO2 Capture
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  • Stephen DeWitt,
  • Rohan Awati,
  • Héctor Rubiera Landa,
  • Jongwoo Park,
  • Yoshiaki Kawajiri,
  • David Sholl,
  • Matthew Realff,
  • Ryan Lively
Stephen DeWitt
Georgia Tech
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Rohan Awati
Georgia Tech
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Héctor Rubiera Landa
Georgia Institute of Technology
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Jongwoo Park
Georgia Tech
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Yoshiaki Kawajiri
Georgia Institute of Technology
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David Sholl
Georgia Tech
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Matthew Realff
Georgia Institute of Technology
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Ryan Lively
Georgia Tech
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Abstract

Adsorption of CO2 from post-combustion flue gas is one of the leading candidates for globally-impactful carbon capture systems. This work highlights opportunities and limitations of sub-ambient CO2 capture processes utilizing a multi-stage separation process. A hybrid process design using a combination of pressure-driven separation of CO2 from flue gas followed by CO2-rich product liquefaction to produce high purity (>99%) CO2 at pipeline conditions is considered. The economic viability of applying pressure swing adsorption (PSA) processes using fiber sorbent contactors with internal heat management were found to be most influenced by the productivity of the adsorption system. Three exemplar fiber sorbents (MIL-101(Cr), UiO-66, and zeolite 13X) were considered for application in the sub-ambient process of PSA unit. MIL-101(Cr) and UiO-66 fiber composites were estimated to have costs of capture as low as $61/tonne CO2.

Peer review status:IN REVISION

31 Dec 2020Submitted to AIChE Journal
03 Jan 2021Assigned to Editor
03 Jan 2021Submission Checks Completed
03 Jan 2021Reviewer(s) Assigned
04 May 2021Editorial Decision: Revise Major
18 Jun 20211st Revision Received