BDA/DEEA两相吸收剂吸收CO_2的研究  

CO_2 Absorption by BDA/DEEA Biphasic Solvents

作　　者：徐志成[1] 王淑娟[1] 陈昌和[1] 

机构地区：[1]热科学与动力工程教育部重点实验室,清华大学热能工程系,北京100084

出　　处：《工程热物理学报》2013年第5期993-997,共5页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.50876051)

摘　　要：本文发现了一种高效两相吸收剂:BDA(1,4-丁二胺)与DEEA(N,N-二甲基乙醇胺)组成的混合溶液,采用快速筛选实验台和自动滴定仪确定了其最佳浓度,并用离子色谱仪分析了吸收结束后上下层的胺,CO_2和水的分布,应用核磁共振仪研究了CO_2与胺的反应产物。结果表明,该吸收剂的最佳浓度为2 mol/L BDA+4 mol/L DEEA(2B4D),吸收后下层吸收的CO_2占总吸收量的97.4%,满足两相系统的要求。91%的CO_2在与胺反应后转化为氨基甲酸根,其余以自由态的CO_2以及CO_3^(2-)/HCO_3^-的形式存在。The mixtures of 1,4-Butanediamine （BDA） and 2-（Diethylamino）-ethanol （DEEA） were found to be efficient biphasic solvents. The best concentration was identified and compared using a fast screening facility. The individual amine distributions in the upper and lower phases were measured by DX-120 ion chromatography （IC）, with the reaction products of amine and CO2 studied by a JNM ECA-600 nuclear magnetic resonance spectrometer （NMR）. The results show that the best solution was the blend of 2 mol/L BDA and 4 mol/L DEEA （2B4D）. The CO2 in the lower phase was 97.4% of the total absorbed CO2. And 91% of absorbed CO2 was converted into carbamate, while the remaining CO2 existied in the form of free CO2 and CO_3^2-/HCO3-.

关 键 词：吸收剂 CO_2 两相 BDA DEEA 

分 类 号：TQ028[化学工程]