Analysis of a precipitating solvent absorption process for reducing CO2 emissions from black coal fired power generation

Abstract

Carbon capture and storage (CCS) is a technology that has the potential to provide deep cuts in CO2 emissions from coal-fired power generation. This paper describes retrofitting the CO2CRC's low cost "UNO MK 3" precipitating potassium carbonate (K2CO3) process to a 335MW (net) black coal-fired subcritical power station, typical of those in Australia.The use of heat integration to reduce the net energy penalty of retrofitting CO2 capture is also studied and the modifications required to the steam cycle for these cases are outlined. Retrofitting the UNO MK 3 process has a smaller energy penalty compared with amine-based processes. Heat integration strategies can reduce this energy penalty by a..