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Title: Carbonic anhydrase textile structured packing for efficient CO 2 absorption in methyldiethanolamine solvent

Journal Article · · AIChE Journal
DOI:https://doi.org/10.1002/aic.18191· OSTI ID:1995818
ORCiD logo [1];  [2];  [3]; ORCiD logo [3];  [4]
  1. Center for Applied Energy Research University of Kentucky Lexington Kentucky USA
  2. Center for Applied Energy Research University of Kentucky Lexington Kentucky USA, Department of Chemistry University of Kentucky Lexington Kentucky USA
  3. Department of Textile Engineering, Chemistry and Science, Wilson College of Textiles North Carolina State University Raleigh North Carolina USA
  4. Center for Applied Energy Research University of Kentucky Lexington Kentucky USA, Department of Mechanical Engineering University of Kentucky Lexington Kentucky USA

Abstract Carbonic anhydrase (CA) is an attractive biodegradable catalyst for CO 2 absorption in solvent‐based CO 2 capture. However, maintaining the stability of CA as a homogeneous component of the solvents is a challenge. Solvent regeneration temperature typically exceeds the enzyme thermal tolerance, which leads to CA deactivation. To reduce the need for frequent CA replenishment and to avoid inactive CA accumulation in the solvent, this work shows the benefits of an immobilization strategy where CA is fixed in a second‐generation design of textile structured packing (CATSP‐2) modules. The enzyme‐immobilized packing showed 1.5 times better performance in CO 2 separation compared with traditional structured packing with a corresponding increased CO 2 loading in the rich solvent. The modules exhibited good CA activity retention of ~80% during the tests without any CA replenishment. Applying CATSP‐2 could potentially decrease the packing height and absorber column size for a lower cost per amount of CO 2 captured.

Sponsoring Organization:
USDOE
OSTI ID:
1995818
Journal Information:
AIChE Journal, Journal Name: AIChE Journal; ISSN 0001-1541
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
United States
Language:
English

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