A process for recovering CO2 from the boiler flue gas of a power plant by a chemical absorption method requires a large amount of steam to regenerate the spent absorbent. The recovery heat exhausted from the CO2 recovery process and utilization of the recovered heat as a source of power plant feed water heating is studied. The reduction of generated power, required for the CO2 recovery from the flue gas by the chemical absorption method is evaluated. The effectiveness of such a heat recovery process is assessed in terms of the power loss. The power loss by heat recovery is decreased to one-third compared with that in the case of no heat recovery. The reduction of power generated in a natural gas-fired power plant is evaluated to be about 5 similar to 6 % when new absorbents KS-1 and KS-2 are used in the CO2 recovery process. In the case of a coal-fired power plant, the power loss amounts to about 9%.