Hybrid carbon dioxide removal systems

A carbon dioxide removal system for removing carbon dioxide (CO2) gas from gaseous feeds, the system comprising:

• a first gas-liquid contactor comprising:
• a first inlet that receives an alkaline capture solution;
• and
• a first flow path that receives the first gaseous feed from a first source and directs a first flow of the first gaseous feed to interact with the alkaline capture solution in the first gas-liquid contactor, wherein directing the-first flow causes a first portion of CO2 from the first gaseous feed to dissolve into the alkaline capture solution and form a first CO2-rich alkaline capture solution;
• a second gas-liquid contactor comprising:
• a second inlet that receives the first CO2-rich alkaline capture solution from the first gas-liquid contactor;
• and
• a second flow path that receives the second gaseous feed from a second source and directs a second flow of the second gaseous feed to interact with the first CO2-rich alkaline capture solution, wherein directing the second flow causes a second portion of CO2 from the second gaseous feed to dissolve into the first CO2-rich alkaline capture solution and form a second CO2-rich alkaline capture solution, wherein the second flow is independent of the first gaseous feed, and a concentration of CO2 in the second CO2-rich alkaline capture solution is higher than a concentration of CO2 in the first CO2-rich alkaline capture solution;
• and
• a third gas-liquid contactor comprising:
• a third inlet that receives the second CO2-rich alkaline capture solution from the second first gas-liquid contactor;
• a vessel that separates a third portion of CO2 from the second CO2-rich alkaline capture solution;
• and
• a heating unit configured to:
• receive geothermal heat;
• and
• heat the vessel, wherein heating the vessel causes the third second portion of CO2 being separated from the second CO2-rich alkaline capture solution.