Novel Method for CO2 Fixation and Storage Preventing Climate Crisis: an “Artificial Forest” Model

In the previously developed method using low NaOH and CaCl2 concentrations, the atmospheric CO2 is simply fixed to CaCO3 and NaCl, which exist as coal or limestone, and a large chamber comprising spray nozzles to capture CO2 efficiently by mists or droplets of NaOH solution has been designed. In the present study, a polytunnel made of polymer sheets, an “artificial forest” model, which allows CO2 penetration instead of the chamber has been proposed. Additionally, using tunnels, mine galleries, and caves instead of polytunnels or hard chambers, an extremely huge space wherein a large amount of CO2 can be captured efficiently would be prepared without environmental concerns, and this model is definitely practical and economical for direct air capture, and it is consistent with the sustainable development goals (SDGs). Using a miniature polytunnel, the atmospheric CO2 could be captured efficiently.