利用磷石膏净化氨法CO_2捕集尾气  

Using Phosphogypsum to Clean Exhaust Gas from CO_2 Capture by Aqueous Ammonia

作　　者：左启银[1] 姬存民[1] 朱家骅[1] 余徽[1] 商剑锋[2] 崔文鹏[2] 刘项 

机构地区：[1]四川大学化学工程学院,四川成都610065 [2]中石化中原油田普光分公司,四川达州635000 [3]中石化南京工程公司,江苏南京211100

出　　处：《四川化工》2014年第3期9-12,共4页Sichuan Chemical Industry

基　　金：国家科技支撑计划课题(2013BAC12B01)

摘　　要：根据NH3-CO2-H2O汽液平衡模型预测结果,指出受液相温度和碳化度影响,氨法烟气CO2捕集尾气NH3分压低于1.0Pa的工艺条件苛刻,常温常压下不能达到尾气排放NH3含量<10ppmv的环保指标。提出利用磷石膏复分解反应使该三元体系转化为沉淀和强电解质溶液,抑制NH3逸出,具有脱除尾气微量NH3的机理,同时可提高CO2捕集率。According to the prediction results of vapor-liquid equilibrium model for NH3-CO2-H2O system,it＇s hard to reach the process conditions that the partial pressure of NH3is below 1.0Pa in the exhaust gas from CO2capture by aqueous ammonia,and it also can＇t meet the environmental index in normal temperature and pressure.Bringing up that using phosphogypsum metathesis reaction turn the ACW system to a strong electrolyte solution with precipitate,it can restrain the NH3escape,removal microscale NH3in exhaust gas,at the same time,it can improve the gas removal rate of CO2.

关 键 词：CO2捕集 尾气脱氨 磷石膏 汽液平衡 预测模型 

分 类 号：TQ028.1[化学工程]