Engineered yeast for enhanced CO2 mineralizationElectronic supplementary information (ESI) available. See DOI: 10.1039/c2ee24060b
In this work, a biologically catalysed CO 2 mineralization process for the capture of CO 2 from point sources was designed, constructed at a laboratory scale, and, using standard chemical process scale-up protocols, was modelled and evaluated at an industrial scale. A yeast display system in Sacchar...
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Main Authors | , , , , , , , |
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Format | Journal Article |
Language | English |
Published |
23.01.2013
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Online Access | Get full text |
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Summary: | In this work, a biologically catalysed CO
2
mineralization process for the capture of CO
2
from point sources was designed, constructed at a laboratory scale, and, using standard chemical process scale-up protocols, was modelled and evaluated at an industrial scale. A yeast display system in
Saccharomyces cerevisae
was used to screen several carbonic anhydrase isoforms and mineralization peptides for their impact on CO
2
hydration, CaCO
3
mineralization, and particle settling rate. Enhanced rates for each of these steps in the CaCO
3
mineralization process were confirmed using quantitative techniques in lab-scale measurements. The effect of these enhanced rates on the CO
2
capture cost in an industrial scale CO
2
mineralization process using coal fly ash as the CaO source was evaluated. The model predicts a process using bCA2-yeast and fly ash is ∼10% more cost effective per tonne of CO
2
captured than a process with no biological molecules, a savings not realized by wild-type yeast and high-temperature stable recombinant CA2 alone or in combination. The levelized cost of electricity for a power plant using this process was calculated and scenarios in which this process compares favourably to CO
2
capture by MEA absorption process are presented.
Saccharomyces cerevisae
engineered to enhance CO
2
mineralization decreases the cost of CO
2
capture compared to other mineralization approaches. |
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Bibliography: | 10.1039/c2ee24060b Electronic supplementary information (ESI) available. See DOI |
ISSN: | 1754-5692 1754-5706 |
DOI: | 10.1039/c2ee24060b |