After chemical-looping combustion of coal under pressurized condition

the flue gases at the fuel reactor outlet are mainly CO_2 and H_2O

and that at the air reactor outlet are mainly N_2 and a small amount of O_2. These high temperature and high pressure flue gases carry a great amount of heat. The system of the pressured chemicallooping combustion coupling combined cycle(PCLC-CC) can realize cycle cascade utilization of the energy. In this paper

the Aspen Plus software was applied to simulate and thermodynamically analyze the PCLC-CC system of coal. The process simulation for the chemical chain combustion system

gas turbine

waste heat boiler and steam turbine was performed

respectively. The model analysis tools and process options of the Aspen Plus were employed to analyze and optimize the system parameters. The results show that

the minimum amount of air the PCLC-CC system needs is 137.43 kg/s

when the minimum oxygen carrier to coal ratio is 62.5

the net efficiency and CO_2 capture rate of the system is 40.65% and 92.81%

respectively

this agrees with the actual situation.