铵基循环碳酸化固定CO_2  

CO_2 carbonation sequestration by cycling of ammonium

作　　者：潘丹萍[1] 郭彦鹏[1] 陈浩[1] 瞿如敏[1] 杨林军[1] 

机构地区：[1]东南大学能源热转换及其过程测控教育部重点实验室,江苏南京210096

出　　处：《化工学报》2013年第6期2232-2239,共8页CIESC Journal

基　　金：国家自然科学基金项目(51176034)~~

摘　　要：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；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，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.

关 键 词：铵基循环 CO2 碳酸化固定 氨水 电石渣 

分 类 号：X51[环境科学与工程—环境工程]