This technology is using water solutions containing hydroxide sorbents with high CO

This technology is using water solutions containing hydroxide sorbents with high CO

The implementation of the direct air capture (DAC) technology in WITCH is based on a technology described in a report from the American Physical Society (Socolow et al 2011). 2 affinity to capture it from the atmosphere. The reference scale unit is able to capture 1 MtCO2 per year with a lifetime of 20 years. Such a unit has an initial estimate of investment cost of 1.6 billions USD, which can be translated into an annual capital cost of 185 millions USD per year, i.e. 185 $ per ton of CO2 (This cost estimate is in line with existing summaries of different cost estimates such as House et al (2011), even though higher potential costs have also been reported click resources (Daggash et al 2019)). Operational costs are estimated to 90 USD per ton of CO2. The investment cost decreases of 1% per year with an additional effect from learning by doing based on the cumulative capacity of CCS technologies (6%). The energy requirements are 1.1–1.9 GJ of electricity per ton of CO2 and 6–10 GJ of natural gas per ton of CO2, varying over time to reflect efficiency improvements. Read more