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Low-cost method transforms ordinary rocks into carbon dioxide storage | It's not exactly the fastest way to hoover up CO2, but the team believes it could be a relatively inexpensive affair, and can easily scale to help sort our emissions problem worldwide.
I'm really rooting for the Stanford University researchers working on this carbon removal method. They've found a way to activate materials commonly found in rocks to capture carbon dioxide out of the air at room temperature. It's not exactly the fastest way to hoover up CO2, but the team believes…
The Stanford team used its lab furnace to heat a mixture of calcium oxide – derived from commonly available limestone that's used to make cement – with another mineral containing magnesium and silicate ions. To make this work at scale, researcher and Stanford chemistry professor Matthew Kanan explained this could be implemented on farms, with multiple beneficial effects. “Our process would require less than half the energy used by leading direct air capture technologies, and we think we can be very competitive from a cost point of view,” said Kanan.
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