DEA复配水溶液二氧化碳溶解度的测定实验  

Experimental study of the carbon dioxide absorption in mixtures of aqueous DEA and others

作　　者：李小康[1] 刘应书[1] 张辉[1] 魏广飞[1] 李虎[1] 张四宗[1] 

机构地区：[1]北京科技大学机械工程学院,北京100083

出　　处：《化工进展》2013年第4期769-773,778,共6页Chemical Industry and Engineering Progress

基　　金：国家863计划(2012AA101800)

摘　　要：设计了测定CO2在溶液中溶解度的实验装置,并对2 mol/L的DEA水溶液分别在温度条件为308 K、318 K、328 K、358 K,CO2分压力范围0～150 kPa时的CO2溶解度进行了测定。并选取MDEA、DETA、AEE和SG作为代表添加物,测定了添加剂与DEA摩尔比为1∶3、醇胺总浓度为2mol/L的条件下溶液中CO2的溶解度。结果表明,在实验压力范围内,DEA溶液中CO2溶解度随压力增大逐渐增大随温度升高而减小;对DEA溶液中CO2的溶解度影响大小顺序为DETA>AEE>SG>MDEA。A device was designed to measure the solubility of CO2in the aqueous amine in this research.The following data were obtained,carbon dioxide solubility in 2 mol/L aqueous DEA at 308 K、318 K、 328 K、358 K under CO2partial pressure of 0—150 kPa.Meanwhile,mixtures of additives such as DETA,MDEA,AEE as well as SG and aqueous DEA were compounded and the solubility of CO2in such mixtures were measured.The molar ratio of DEA and the additive in the mixture was 3∶1 and the total concentration of the amine remained at 2 mol/L.The results showed that elevating the partial pressure of CO2 may contribute to the increase of the solubility in the aqueous DEA,and the temperature played a reverse role.Impacts of different additives on the solubility of CO2was presented to be DETA AEE SG MDEA.

关 键 词：DEA复配溶液 二氧化碳 平衡溶解度 

分 类 号：TQ028.8[化学工程] TE645[石油与天然气工程—油气加工工程]