Characteristics Evaluation of a CO{sub}2-Capturing Power Generation System with Reheat Cycle Utilizing Regenerative Oxygen-Combustion Steam-Superheater

摘要

A new CO{sub}2-capturing power generation system is proposed that can be easily realized by applying conventional technologies. In the proposed system, the temperature of medium-pressure steam in a thermal power plant is raised by utilizing an oxygen-combusting regenerative steam-superheater. The CO{sub}2 generated by combusting the fuel in the superheater can be easily separated and captured from the exhaust gas at the condenser outlet, and is liquefied. The superheated steam is used to drive a steam turbine power generation system. Using a high-efficiency combined cycle power generation system as an example, it is shown that the proposed system can increase the power output by 10.8%, and decrease the CO{sub}2 emissions of the entire integrated system by 18.6% with a power generation efficiency drop of 2.36% compared with the original power plant without CO{sub}2 capture, when the superheated steam temperature is 750℃.