1. Extraction of CO2 from a mixture
If we wanted to avoid extracting CO 2 from fumes resulting from combustion, whose concentration varies between 3 and 15% vol, we could store these fumes directly underground, but given the volumes involved the cost would then be unacceptable. This is why it is necessary to remove the CO 2 and transport it as an almost pure gas under pressure (110 bar or more) to a geological storage site (for example, a saline aquifer, a depleted oil or gas extraction site, a mineralization...).
The main techniques for separating the components of a mixture are
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Extraction of CO2 from a mixture
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