decreased steeply at the gas turbine (stream 11) due to the com- bustion reaction. During the reaction, CO and H2 were converted in to CO2 and H2O; therefore, the composition of CO2 increased. The hot exhaust gas from the turbine passed the HRSG,resulting in heat transfer to the BFW for the production of steam.HP,IP and LPs team used for the steam turbines were generated from the syngas coolers and HRSG by recovering the heat from a gasifier and gas turbine exhaust gases. Moreover,syngas cooler and HRSG were modeled to calculate the quantity of the generated steam and the amount of heat recovered by utilizing the heat exchanger module in PRO/II simulator. This is furtherance, with the assumption that the approaching temperature for Economizer is 4 C and that for Super heater is 25 C. After the heat transfer,the exhaust gas was emitted to the atmosphere, as illustrated by stream 13 in Fig. 4.