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- W962019778 endingPage "86" @default.
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- W962019778 abstract "Carbonic anhydrase enzymes are biological catalysts, which accelerate the interconversion between dissolved carbon dioxide and bicarbonate ion, providing rapid approach to equilibrium between dissolved CO2 and HCO3− in aqueous solutions. This simple CO2 hydration reaction is fundamental to CO2 scrubbing processes that rely on chemical sorption in aqueous solvents for selective removal of CO2 from mixed gases, raising interest in carbonic anhydrase as a potential catalyst for industrial gas–liquid scrubbing applications. Although initially believed limited to ambient temperature regimes, a number of carbonic anhydrases are now known to be very stable at typical postcombustion CO2 absorber temperatures in the 30–50 °C range, and also show tolerance up to the moderate regenerator temperatures, around 70–80 °C, envisioned for use with low-enthalpy solvents. Furthermore, certain carbonic anhydrases exhibit good longevity in the alkaline and high molar or high ionic strength aqueous solvents required for efficient CO2 separation, especially important for processes operating near atmospheric pressure. These enzyme features open the possibility for new process approaches, which could lower the cost of CO2 scrubbing while mitigating implementation risks due to the close resemblance to conventional recirculating absorber–desorber scrubbing processes. This chapter describes the general mode of action of carbonic anhydrase in the context of CO2 gas–liquid scrubbing processes, including descriptions of corresponding analytical and methods. The current state of the art in carbonic anhydrase diversity and characteristics relevant to CO2 scrubbing applications are reviewed. Studies evaluating the utility and stability of carbonic anhydrase for CO2 scrubbing applications, including stability of different enzyme–solvent combinations and stability of the enzyme toward common gas processing contaminants are presented. Based on these characteristics, simplified schematic process configurations in the context of enzyme benefit and longevity are discussed, and perspective is provided on the potential for commercial deployment of enzyme-based CO2 scrubbing technology, as well as areas for further development." @default.
- W962019778 created "2016-06-24" @default.
- W962019778 creator A5056424752 @default.
- W962019778 creator A5063094432 @default.
- W962019778 date "2015-01-01" @default.
- W962019778 modified "2023-09-26" @default.
- W962019778 title "Enzyme-catalyzed Solvents for CO2 Separation" @default.
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