Converting Carbon Monoxide to Hydrogen and Acetate
Author Information
Author(s): Henstra Anne M., Stams Alfons J. M.
Primary Institution: Centre for Biomolecular Sciences, University of Nottingham
Hypothesis
Can Carboxydothermus hydrogenoformans effectively convert carbon monoxide to hydrogen and acetate under controlled conditions?
Conclusion
The study found that Carboxydothermus hydrogenoformans can achieve very low carbon monoxide levels, making the produced hydrogen suitable for sensitive applications.
Supporting Evidence
- Final CO levels were 117 ppm without CO2 removal and below 2 ppm with CO2 removal.
- The Gibbs free energy change suggests a shift from hydrogenogenic to acetogenic metabolism.
- Acetate production was detected in cultures without CO2 trap, indicating metabolic flexibility.
Takeaway
This study shows that a special bacterium can turn carbon monoxide into hydrogen gas and even a little bit of vinegar, which is useful for making clean energy.
Methodology
Batch cultures of Carboxydothermus hydrogenoformans were grown with a 100% CO gas phase, with and without CO2 removal, and various gas and liquid samples were analyzed over time.
Limitations
The study did not explore the kinetic aspects of the metabolic processes in detail.
Digital Object Identifier (DOI)
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