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- In relation to this article, we declare that there is no conflict of interest.
- Publication history
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Received September 8, 2023
Accepted October 29, 2023
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Rationalizing the Effi ciency of HKUST-1 for Capture and Biomimetic Sequestration of CO 2
Abstract
In light of their outstanding properties, metal–organic frameworks appear to be the latest and most assured sorbent in CCUS
technology. In this study, adsorption isotherms of pure CO 2 , CH 4 , and N 2 at three diff erent temperatures were obtained for
HKUST-1, and it showed a maximum CO 2 adsorption uptake of 8.25 mmol g −1 at 298 K and 30 bar. HKUST-1 was also
employed as support to immobilize carbonic anhydrase (CA) derived from the bovine erythrocytes through cross-linked
enzyme aggregates. CO 2 hydration as well as its transformation into CaCO 3 was studied using the CA immobilized HKUST-1
(CA/HKUST-1). The biocatalytic activity, thermal stability, reusability, and storage stability of CA/HKUST-1 were evaluated
through para-nitrophenyl acetate hydrolysis. CA immobilized on HKUST-1 exhibits a fairly low K cat / K m value than the
free CA; regardless of the above, the reusability of CA/HKUST-1 for about 20 cycles makes it a suitable biocatalyst of CO 2
hydration under industrial operating conditions. The results demonstrated HKUST-1 as potential support for CA immobilization
for CO 2 sequestration and high CO 2 uptake adsorbent.
