This research will focus on the removal of CO2 from post – combustion capture by absorption method, because absorption is a more economical and suitable process, and in fact, at present, it is the only commercially proven process for CO2 capture from low CO2 concentration streams such as flue gas from power plants (Astarita et al., 1983; Kohl and Neilsen, 1997; Fisher et al., 2002).