So far, most methods to eliminate carbon dioxide required very high concentrations of it, such as smoke emissions from power plants and at a very high cost.
However, the new method developed by MIT scientists can capture CO2 at any concentration, is significantly less expensive, and requires less energy.
The device is basically a large battery that absorbs carbon dioxide from the air - or another gas stream - that passes over its electrodes as it charges.
The reverse reaction takes place when the battery is discharged, providing part of the energy needed for the entire system, and in the process expels a stream of pure carbon dioxide.
The pure CO2 obtained can then be sold to bottling companies, greenhouses or other companies that use it in their process and, so far, came from the burning of fossil fuel.
Source: pubs.rsc.org, read original article
https://pubs.rsc.org/en/content/articlelanding/2019/ee/c9ee02412c#!divAbstract
