Phlair’s DAC machine employs what’s known as the “pH swing” method to capture carbon dioxide. Inside, the basic (high pH) solvent absorbs carbon dioxide as it flows through the air contractor. After the saturated solvent exits the contractor, it is dumped into a tank where it’s doused with acid (low pH). That swing in pH from high to low spurs a chemical reaction that releases the carbon dioxide so it can be piped elsewhere to be used or stored. The solvent then flows back into the hydrolyzer where it’s regenerated.
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