Method for recovery of carbon dioxide from a gas using a process gas heated reboiler for carbon dioxide removal in a stripper

A method for recovery of carbon dioxide from a carbon dioxide containing gas comprising the steps of:

• a. cooling a first gas stream G1 in a reboiler (A1) to provide a second gas stream G2;
• b. preparing the second gas stream G2 to provide at least a portion of a third gas stream G3
• c. absorbing the third gas stream G3 in an alkanolamine absorbing agent to provide a first carbon dioxide rich liquid (L1) and a carbon dioxide lean gas (G4);
• d. optionally pressurising and heat exchanging the first carbon dioxide rich liquid (L1) to provide a second carbon dioxide rich liquid (L2);
• e. separating the second carbon dioxide rich liquid (L2) in a stripper (A3) in order to obtain a carbon dioxide rich gas (G5) and a first carbon dioxide lean liquid (L3′);
• f. reboiling the first carbon dioxide lean liquid (L3′) in the reboiler (A1) in order to obtain a second carbon dioxide lean liquid (L3) and a gas G5′ which is further separated in the stripper (A3), in order to give the second carbon dioxide lean liquid (L3) and the first carbon dioxide rich gas G5;
• wherein the first carbon dioxide lean liquid (L3′) is reboiled using the gas stream G1 and the second carbon dioxide lean liquid (L3) is returned to the absorber (A2);
• and
• wherein the method prior to step a comprises the step of feeding a combustion gas GO to a means for utilizing heat, in order to provide the gas stream G1, the gas stream G1 having a temperature that is lower than the temperature of GO.