The main system parameters

including longterm cyclic carbonation conversion

average carbonation conversion

CO2 capture efficiency and energy requirement for a calciner in the two kinds of typical calcination atmospheres

including pure N2 and high concentration CO2 were investigated by experiment and calculation during the cyclic calcination/carbonation process for CO2 capture using limestone and dolomite.The results showed that fresh sorbent flow ratio and recycled sorbent flow ratio had direct effect on average carbonation conversion

CO2 capture efficiency and energy requirement for the calciner.For the same fresh sorbent and recycled sorbent flow ratios

dolomite exhibited greater average carbonation conversion and CO2 capture efficiency than limestone.At CO2 capture efficiency of 95％ and in the same calcination atmosphere

at least 82 kJ·（mol CO2）-1 was saved in the minimum energy requirement for the calciner using dolomite than that using limestone.Compared with the results in pure N2 calcination atmosphere

the two sorbents both showed a decrease in average carbonation conversion and CO2 capture efficiency for the sorbents and exhibited an increase in minimum energy requirement for the calciner in high concentration CO2 atmosphere

however

the changes of these main system parameters for dolomite were less than those for limestone.