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Lime isn't really all that different from cement -- it's made by baking the CO2 out of limestone, historically using charcoal kilns (also not very CO2 friendly)
by wiredfool 3y ago
Lime isn't really all that different from cement -- it's made by baking the CO2 out of limestone, historically using charcoal kilns (also not very CO2 friendly).
- pfdietz 3y agoThere's a company commercializing lime obtained from silicates. The process involves acid dissolution of the silicate, then conversion of the chlorides to oxides by high temperature reaction with steam (releasing the chlorine in hydrogen chloride, which is then recycled back to dissolve more silicates.)
- SoftTalker 3y agoAnd how do they create the steam?
- pfdietz 3y agoThat wasn't specified. It can be done without fossil fuels, of course. If I understand correctly, it doesn't require more heat energy than the conventional process starting from limestone.