Carbon dioxide adsorbent including barium titanate, carbon dioxide capture module including the same, and methods for separating carbon dioxide using the same

A carbon dioxide capture module, comprising:

• an adsorption layer including a carbon dioxide adsorbent, the carbon dioxide adsorbent including a complex oxide including barium and titanium, the complex oxide having a perovskite crystalline structure and represented by BaxTiyOz, an atomic ratio of Ba/Ti ranging from about 0.95 to about 1.7;
• a support plate supporting the adsorption layer;
• and
• a housing including an inlet and an outlet, the inlet configured to introduce an input gas stream, the outlet configured to emit a treated gas stream.

A method of separating carbon dioxide, comprising:

• preparing a carbon dioxide capture module filled with a carbon dioxide adsorbent, the carbon dioxide adsorbent including a complex oxide, the complex oxide including barium and titanium, the complex oxide having a perovskite crystalline structure and represented by BaxTiyOz, an atomic ratio of Ba/Ti ranging from about 0.95 to about 1.7;
• supplying an input gas stream including carbon dioxide to the carbon dioxide capture module;
• contacting the carbon dioxide adsorbent with the input gas stream at a temperature of greater than or equal to about 30° C. to adsorb carbon dioxide onto a surface of the carbon dioxide adsorbent;
• and
• emitting the input gas stream from the carbon dioxide capture module.