Method for removal of CO 2 from a flue gas stream, comprising the steps of: a) contacting a flue gas stream comprising CO 2 with a first absorption liquid comprising NH 3 in a first gas liquid mass transfer device such that the flue gas stream is depleted in CO 2; b) contacting the flue gas stream depleted in CO 2 of step a) and discharged from the first gas liquid mass transfer device with a second absorption liquid in a second gas liquid mass transfer device such that NH 3 from the flue gas stream is absorbed in said second absorption liquid to form a flue gas stream depleted in CO 2 and NH 3; c) separating NH 3 from the second absorption liquid discharged from the second gas liquid mass transfer device in a second absorption liquid regeneration unit such that a gas stream comprising NH 3 is obtained; and d) contacting said gas stream comprising NH 3 separated in step c) and discharged from the second absorption liquid regeneration unit with a third absorption liquid in a third gas liquid mass transfer device such that NH 3 is absorbed in said third absorption liquid; characterized by e) fluidly connecting the second gas liquid mass transfer device and the second absorption liquid regenerator unit via an absorption liquid cycle such that at least a portion of NH 3 rich absorption liquid from the second gas liquid mass transfer device is directed to the second absorption liquid regenerator unit, and at least a portion of the NH 3 lean absorption liquid from the second absorption liquid regenerator unit is recycled to the second gas liquid mass transfer device; and f) fluidly connecting the third gas liquid mass transfer device with a CO 2 removal system comprising the first gas liquid mass transfer device and the second gas liquid mass transfer device such that the residual gas depleted in NH 3 from step d), which exits the third gas liquid mass transfer device, is joined with the flue gas stream before the flue gas stream is contacted with the second absorption liquid in step b). a) contacting a flue gas stream comprising CO 2 with a first absorption liquid comprising NH 3 in a first gas liquid mass transfer device such that the flue gas stream is depleted in CO 2; b) contacting the flue gas stream depleted in CO 2 of step a) and discharged from the first gas liquid mass transfer device with a second absorption liquid in a second gas liquid mass transfer device such that NH 3 from the flue gas stream is absorbed in said second absorption liquid to form a flue gas stream depleted in CO 2 and NH 3; c) separating NH 3 from the second absorption liquid discharged from the second gas liquid mass transfer device in a second absorption liquid regeneration unit such that a gas stream comprising NH 3 is obtained; and d) contacting said gas stream comprising NH 3 separated in step c) and discharged from the second absorption liquid regeneration unit with a third absorption liquid in a third gas liquid mass transfer device such that NH 3 is absorbed in said third absorption liquid; e) fluidly connecting the second gas liquid mass transfer device and the second absorption liquid regenerator unit via an absorption liquid cycle such that at least a portion of NH 3 rich absorption liquid from the second gas liquid mass transfer device is directed to the second absorption liquid regenerator unit, and at least a portion of the NH 3 lean absorption liquid from the second absorption liquid regenerator unit is recycled to the second gas liquid mass transfer device; and f) fluidly connecting the third gas liquid mass transfer device with a CO 2 removal system comprising the first gas liquid mass transfer device and the second gas liquid mass transfer device such that the residual gas depleted in NH 3 from step d), which exits the third gas liquid mass transfer device, is joined with the flue gas stream before the flue gas stream is contacted with the second absorption liquid in step b).