Chemical looping combustion is a promising technology for the combustion of fuel with inherent separation of CO2.The experiments on chemical looping combustion of coal were performed in a 1 kWth interconnected fluidized bed reactor using a natural Australian hematite as oxygen carrier.The effects of fuel reactor temperature on the gas compositions from both fuel and air reactors were discussed.A comparison of the effects of several factors on coal gasification efficiency

carbon capture efficiency and gasification products conversion efficiency was carried out and the gaseous sulfur compounds released in the system were analyzed.The results indicated that with increasing fuel reactor temperature from 900℃ to 985℃ there was a gradual increase of CO volumetric fraction but a gradual decrease of CO2 volumetric fraction in the fuel reactor

and CO2 concentration in the air reactor dropped linearly correspondingly.A higher fuel reactor temperature would contribute to significantly increasing coal gasification efficiency and carbon capture efficiency.An increase in the mass of oxygen carrier and coal

the main factors

would cause the gasification conversion increase and decrease respectively.Sulfur was released primarily as SO2 in the fuel reactor

and SO2 concentration increased from 515×10-6 to 562×10-6 due to a change in fuel reactor temperature from 900℃ to 985℃.