Abstract:
The CO2 separation technology based on pressurized CLC with Calciumbased oxygen carrier was introduced. The influences of the temperature and the mole ratio of the fuel in the fuel reactor under pressurized condition on the gas phase and solid phase balance constituents were analyzed, and the influence of the pressure in range of optimal temperature and mole ratio on the different constituents was analyzed too. The influence of pressure on the conversion rate of the fuel and the oxygen carrier was studied. The influences of the temperature under different pressure on the conversion rate of the fuel and the oxygen carrier and the contents of SO2 and H2S were investigated. The influence of the pressure in the oxidation reactor on different constituents was expounded. The results show that under pressurized condition, the optimal reaction temperature in the fuel reactor is 850℃ to 950℃, the optimal mole ratio of the oxygen carrier and the fuel is 0.25, the optimal minimum pressure is 0.5MPa; To increase the pressure is useful for reducing the emissions of SO2 and H2S and improving the conversion rate of the oxygen carrier and the fuel. In the air reactor, to increase the pressure is useful for reducing the emission of SO2 and improving the cycle utilization rate of the oxygen carrier.

Key words: clean combustion, CaSO4 oxygen carrier, pressurized chemical looping combustion (CLC), CO2 separation