Journal article

Carbonic anhydrase promoted absorption of CO2 into potassium carbonate solutions

Hendy Thee, Kathryn H Smith, Gabriel da Silva, Sandra E Kentish, Geoffrey W Stevens

GREENHOUSE GASES-SCIENCE AND TECHNOLOGY | WILEY PERIODICALS, INC | Published : 2015

Abstract

The effect of adding relatively small quantities of Novozymes NS81239 (NCA) carbonic anhydrase enzyme on the absorption of CO2 into a 30 wt% potassium carbonate solution has been investigated. Results demonstrated that at 40°C the addition of 2 μM NCA enhances the pseudo-first-order rate coefficient and thus the overall absorption process of CO2 into potassium carbonate solvents by around 30%. As the enzyme concentration is increased in the range of about 0 to 2 μM the enhancement increases according to a first order relationship, although further increasing the NCA concentration to 9 μM presented no greater catalytic effect than that from 2 μM. The rate coefficient for NCA catalyzed CO2 hyd..

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Grants

Funding Acknowledgements

The authors acknowledge the financial support provided by the Australian government through its Cooperative Research Centre program for this CO2CRC research project. Infrastructure support from the Particulate Fluids Processing Centre (PFPC), a Special Research Centre of the Australian Research Council is also gratefully acknowledged. Samples of carbonic anhydrase enzyme were supplied by Novozymes.