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It could use Kalk, or possibly lye. They say that they are converting the carbonate back into carbon dioxide and Kalk-lye, so I don't think they are making paper with it. They also discuss turning the carbon dioxide into hydrocarbons. If it turns out to be a financially viable way to produce carbon dioxide or hydrocarbons, it might be useful, but I don't know how feasible that might be in the end.
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Jonathan Bertoni
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