日本語 
Mitsubishi Electric and Finland’s VTT Technical Research Centre have wrapped up the core development of a direct ocean capture, (DOC) system intended to pull carbon dioxide out through seawater. Now that the core tech is basically in place and the system performance has been checked via testing, the two groups are leaning into demonstration work and commercial rollout, while also looking for partners to help with the next stage.
DOC itself is a marine carbon dioxide removal method that plays on the ocean’s natural tendency to absorb CO2 from the atmosphere. The idea is, the process takes dissolved inorganic carbon out of seawater and reduces the CO2 level there. Then, because that lowers the CO2 concentration, the method sort of nudges more atmospheric CO2 to enter the ocean, so carbon removal from the air happens gradually, over time.
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People are paying attention to this approach because seawater holds much higher concentrations of CO2 than the atmosphere, at least when you compare it per volume. That difference can make DOC a fairly effective and expandable way to remove carbon. Mitsubishi Electric says it wants to position DOC as one piece of its wider sustainability agenda and carbon neutrality push, and at the same time, it is exploring how to connect the system with existing infrastructure, to make real deployment more workable.
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