Activity and stability of immobilized carbonic anhydrase for promoting CO 2 absorption into a carbonate solution for post-combustion CO 2 capture

Shihan Zhang; Zhaohui Zhang; Yongqi Lu; Massoud Rostam-Abadi; Andrew Jones

doi:10.1016/j.biortech.2011.09.043

Activity and stability of immobilized carbonic anhydrase for promoting CO ₂ absorption into a carbonate solution for post-combustion CO ₂ capture

Shihan Zhang, Zhaohui Zhang, Yongqi Lu, Massoud Rostam-Abadi, Andrew Jones

Research output: Contribution to journal › Article › peer-review

Abstract

An Integrated Vacuum Carbonate Absorption Process (IVCAP) currently under development could significantly reduce the energy consumed when capturing CO ₂ from the flue gases of coal-fired power plants. The biocatalyst carbonic anhydrase (CA) has been found to effectively promote the absorption of CO ₂ into the potassium carbonate solution that would be used in the IVCAP. Two CA enzymes were immobilized onto three selected support materials having different pore structures. The thermal stability of the immobilized CA enzymes was significantly greater than their free counterparts. For example, the immobilized enzymes retained at least 60% of their initial activities after 90days at 50°C compared to about 30% for their free counterparts under the same conditions. The immobilized CA also had significantly improved resistance to concentrations of sulfate (0.4M), nitrate (0.05M) and chloride (0.3M) typically found in flue gas scrubbing liquids than their free counterparts.

Original language	English (US)
Pages (from-to)	10194-10201
Number of pages	8
Journal	Bioresource Technology
Volume	102
Issue number	22
DOIs	https://doi.org/10.1016/j.biortech.2011.09.043 https://doi.org/10.1016/j.biortech.2011.09.043
State	Published - Nov 2011

Keywords

CO capture
Carbonate
Carbonic anhydrase
Enzyme immobilization
Stability

ASJC Scopus subject areas

Bioengineering
Environmental Engineering
Renewable Energy, Sustainability and the Environment
Waste Management and Disposal

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title = "Activity and stability of immobilized carbonic anhydrase for promoting CO 2 absorption into a carbonate solution for post-combustion CO 2 capture",

abstract = "An Integrated Vacuum Carbonate Absorption Process (IVCAP) currently under development could significantly reduce the energy consumed when capturing CO 2 from the flue gases of coal-fired power plants. The biocatalyst carbonic anhydrase (CA) has been found to effectively promote the absorption of CO 2 into the potassium carbonate solution that would be used in the IVCAP. Two CA enzymes were immobilized onto three selected support materials having different pore structures. The thermal stability of the immobilized CA enzymes was significantly greater than their free counterparts. For example, the immobilized enzymes retained at least 60% of their initial activities after 90days at 50°C compared to about 30% for their free counterparts under the same conditions. The immobilized CA also had significantly improved resistance to concentrations of sulfate (0.4M), nitrate (0.05M) and chloride (0.3M) typically found in flue gas scrubbing liquids than their free counterparts.",

keywords = "CO capture, Carbonate, Carbonic anhydrase, Enzyme immobilization, Stability",

author = "Shihan Zhang and Zhaohui Zhang and Yongqi Lu and Massoud Rostam-Abadi and Andrew Jones",

note = "Funding Information: The authors are grateful for the financial support for this research by the US Department of Energy/National Energy Technology Laboratory (DOE/NETL) , through Cooperative Agreement No. DE-FC26-08NT0005498. Dr. Shihan Zhang and Dr. Zhaohui Zhang contributed equally to this work. Thanks to Dr. Jonathan Goodwin for his critical review and suggestions. Publication of this paper was authorized by the director of the Illinois State Geological Survey at the University of Illinois at Urbana-Champaign. ",

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AU - Jones, Andrew

N1 - Funding Information: The authors are grateful for the financial support for this research by the US Department of Energy/National Energy Technology Laboratory (DOE/NETL) , through Cooperative Agreement No. DE-FC26-08NT0005498. Dr. Shihan Zhang and Dr. Zhaohui Zhang contributed equally to this work. Thanks to Dr. Jonathan Goodwin for his critical review and suggestions. Publication of this paper was authorized by the director of the Illinois State Geological Survey at the University of Illinois at Urbana-Champaign.

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N2 - An Integrated Vacuum Carbonate Absorption Process (IVCAP) currently under development could significantly reduce the energy consumed when capturing CO 2 from the flue gases of coal-fired power plants. The biocatalyst carbonic anhydrase (CA) has been found to effectively promote the absorption of CO 2 into the potassium carbonate solution that would be used in the IVCAP. Two CA enzymes were immobilized onto three selected support materials having different pore structures. The thermal stability of the immobilized CA enzymes was significantly greater than their free counterparts. For example, the immobilized enzymes retained at least 60% of their initial activities after 90days at 50°C compared to about 30% for their free counterparts under the same conditions. The immobilized CA also had significantly improved resistance to concentrations of sulfate (0.4M), nitrate (0.05M) and chloride (0.3M) typically found in flue gas scrubbing liquids than their free counterparts.

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