Method and absorbent for absorbing carbon dioxide from air

A method for absorbing carbon dioxide from an air stream, the method comprising:

• loading an absorbent with the carbon dioxide in a first device, wherein a hydrogen carbonate-containing solution is formed;
• feeding the hydrogen carbonate-containing solution from the first device into an electrolysis unit;
• electrolyzing the hydrogen carbonate-containing solution in the electrolysis unit to release carbon dioxide, wherein a carbonate-rich solution is formed in the electrolysis unit;
• forming oxygen, hydrogen and carbon dioxide in the electrolysis unit;
• and
• recycling the carbonate-rich solution from the electrolysis unit to the first device.

A device for absorbing carbon dioxide from an air stream, the device comprising:

• a first device configured to load an absorbent with the carbon dioxide and to form a hydrogen carbonate-containing solution;
• and
• an electrolysis unit configured to electrolyze the hydrogen carbonate-containing solution from the first device and to release carbon dioxide, wherein a carbonate-rich solution is formed in the electrolysis unit and
• wherein the device is configured to recycle the carbonate-rich solution from the electrolysis unit to the first device.

A method for absorbing carbon dioxide from an air stream, the method comprising:

• contacting the air stream with a carbon dioxide absorbent, wherein the carbon dioxide absorbent comprises at least:
• a) water in a proportion of greater than or equal to 2 wt % and less than or equal to 93 wt %;
• b) polyethylene glycols or polyols with a molecular weight of less than or equal to 1000 g/mol in a proportion of greater than or equal to 2 wt % and less than or equal to 93 wt %;
• and
• c) carbon dioxide absorbing agent in a proportion of greater than or equal to 5 wt % and less than or equal to 60 wt %, wherein the carbon dioxide absorbing agent comprises inorganic carbonate.

Carbon dioxide absorbent for absorbing carbon dioxide from an air stream, the carbon dioxide absorbent comprising:

• a) water in a proportion of greater than or equal to 2 wt % and less than or equal to 93 wt %;
• b) polyethylene glycols or polyols with a molecular weight of less than or equal to 1000 g/mol in a proportion of greater than or equal to 2 wt % and less than or equal to 93 wt %;
• and
• c) carbon dioxide absorbing agent in a proportion of greater than or equal to 5 wt % and less than or equal to 60 wt %, wherein the carbon dioxide absorbing agent comprises inorganic carbonate.