A bubbling fluidized bed reactor was used to study CO2 capture from flue gas using a sodium-based dry regenerable sorbent, sorbA which was manufactured by korea Electric Power Research Institute. A dry sorbent, sorbA, consists of Na2CO3 for absorption and supporters for mechanical strength. CO2 capture was effective in the lower temperature range of 50-70 ℃, while regeneration occurred in the range of 120-300 ℃. To increase initial CO2 removal, some amount of steam was absorbed in the sorbents before injecting simulated flue gas. It was possible to remove most CO2 for 1-2 minutes at 50 ℃ and residence time of 2 seconds with steam pretreatment. Little or no reduction in initial reaction rate and capture capacity was observed in multicycle tests. The carbonated and regenerated sorbent samples were analyzed by NMR to confirm the extent of reaction. The results obtained in this study can be used as basic data for the scale-up design and operation of the CO2 capture process with two fluidized bed reactors.