3 ms·
> If you are processing a kg of air, you'd be getting only a fraction of a gram of CO2. So if you want to produce say a ton of fuel, you are looking at processi
by mgerdts 2y ago
> If you are processing a kg of air, you'd be getting only a fraction of a gram of CO2. So if you want to produce say a ton of fuel, you are looking at processing many millions of tons of air.
If this could be within piping distance of lime kilns, the concentrated CO2 emitted in cement production could be used. Both processes need a bunch of heat so maybe they could get that from the same solar collectors.
- pfdietz 2y agoThis still causes net CO2 emission to the atmosphere (cement does end up absorbing some CO2 later, but it cannot absorb all of it.) Eliminating CO2 emission from cement production is actually a considerable problem. It's either going to require complete sequestration of all this unavoidable CO2 production, or it's going to require production of calcium oxide from silicates. For example: CaSiO3 + 2 HCl --> CaCl2 + H2O + SiO2 CaCl2 + H2O + heat --> CaO + 2 HCl The last step occurs at high temperature, driving the reaction to the right.