Berkeley Lab researchers are developing a gamut of technologies for direct air capture --With Inspiration From Battery Chemistry
to make these projects more impactful and practicable. Berkeley Lab scientist Bryan McCloskey, who is also a professor in UC Berkeley’s College of Chemistry, decided to use an electrochemistry approach to capture carbon dioxide. His technology, he says, could be less energy-intensive than systems currently in use.A very simplified way of putting it is that electrochemistry involves reactions that produce or consume electrons.
Our electrochemical cell will operate as a closed loop with the absorber, although a water feed is also needed to replenish water that participates in the electrode reactions. So, we’re essentially taking COQ. What is the advantage of this kind of system?capture from air over other competing processes. Commercial methods of direct air capture use thermal methods to regenerate the absorbent. It requires very high heat, around 800 degrees Celsius.
Second is the membrane. The membrane is what isolates the two electrodes of the cell from each other. Otherwise, you would get mixing of the hydrogen and CO, and they’re much more valuable as pure streams. The prototypical membrane in such situations is called Nafion — it’s used in fuel cells and many other applications. Nafion has great performance, but it’s very expensive, so it’s not practical to use at a large scale. We need to design a more cost-effective membrane.reaction.
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