Aqueous ammonia is one of reagents absorbing CO2 and is of vast development potential.In this paper the reaction between decarbonization rich liquid and carbide slug is used for assisting CO2 storage and recycle of aqueous ammonia at normal temperature and pressure.Using aqueous NH4HCO3 as rich liquid

pH and conductivity change during carbonation process were measured

and XRD

SEM and TGA employed for analysis of carbonation reaction products.Meanwhile

compared with aqueous ammonia having same concentration

carbonation reaction solution was also used to absorb CO2.The results show that the carbonation reaction can be accomplished in short time

and the higher temperature and liquid-solid ratio are

the faster the reaction rate is.Besides

ultrasonics can make carbide slug particles smaller

and carbonation reaction solution can be recycled as its property is similar to aqueous ammonia of the same concentration.