PROCESS FOR REMOVAL OF CARBON DIOXIDE FROM FLUE GAS WITH AMMONIA COOLED BY VAPORISED LIQUEFIED NATURAL GAS

摘要

The invention provides a process for removal of CO2 from flue gas, comprising the steps of: a) removing CO2 from flue gas by contacting said flue gas with cooled ammonia in an absorber (13) operated at low temperature to obtain ammonia enriched in CO2 (14) and a purified flue gas (23); b) regenerating ammonia enriched in CO2 in a regenerator (17) operated at elevated pressure to obtain regenerated ammonia (19) and a gas stream enriched in CO2(18); c) regasifying liquefied natural gas via heat exchange against a heat transfer fluid, thereby obtaining natural gas and cooled heat transfer fluid (10); d) at least part of the cooled heat transfer fluid is used to provide cooling needed in step (a).