铵基循环碳酸化固定CO2

引言由煤等化石燃料燃烧产生的温室气体CO2的捕集与封存已引起国际社会的广泛关注[1-2];其中,模仿自然界钙镁硅酸盐矿物风化过程的碳酸化固定是实现大规模封存CO2的重要途径,与其他封存技术相比,碳酸化固定CO2环境风险性小,并可

CO2 carbonation sequestration by cycling of ammonium

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.