A reactor for adsorbing CO2 from a fluid stream includes a reactor housing having a fluid inlet and a fluid outlet. The reactor also includes an inlet ceramic honeycomb structure and an outlet ceramic honeycomb structure positioned inside the reactor housing. The inlet and outlet ceramic honeycomb structures have a plurality of partition walls extending in an axial direction thereby forming a plurality of flow channels and comprises a material that forms bonds with CO2 to adsorb the CO2. The inlet ceramic honeycomb structure is capable of adsorbing an inlet quantity of CO2 and the outlet ceramic honeycomb structure is capable of adsorbing an outlet quantity of CO2. The inlet quantity of CO2 is greater than the outlet quantity of CO2.