Oxy-fuel combustion with fluidized bed is one of the most promising carbon capture technologies. The oxy-fuel combustion of coal/biomass was simulated in a micro-fluidized bed reactor (inner diameter is 10 mm

combustion temperature is 700-900℃) coupled with an online mass spectrometry

to deeply understand the oxy-fuel combustion behavior. Bituminous coal and rosewood were selected as the samples. The effects of oxygen concentration

combustion temperature and mass ratio of coal to biomass on the combustion characteristics

i.e. the total reaction time

the initial reaction time

CO2 concentration in flue gas and the generation rate of CO2 during particle combustion

were investigated. It was found that the increment of oxygen volume fraction lead to an increase of CO2 yield

the decrease of total reaction time and CO2 concentration in the flue gas. Increasing the combustion temperature could enhance the enrichment of CO2

as a result higher CO2 production by particle combustion and CO2 concentration in the flue gas were obtained. Higher ratio of biomass advanced the initial reaction time and shortened the total reaction time

which resulted in a decrease of CO2 concentration in the flue gas and CO2 production by particle combustion but the rate of CO2 formation is increased.