液液两相吸收剂吸收CO2的实验研究  

Experimental study of CO_2 absorption by liquid-liquid biphasic solvents

作　　者：徐志成[1] 王淑娟[1] 陈昌和[1] 

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

出　　处：《清华大学学报（自然科学版）》2013年第3期336-341,352,共7页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金项目(50876051)

摘　　要：液液两相吸收剂具有大幅度降低CO2捕集能耗的潜力。该文在前期实验筛选的基础上,选择了两种具有液液两相特征的吸收剂,DMBA(N,N-二甲基丁胺)和TEA(三乙基胺),分析了其分层后的CO2负载量;在自建的快速筛选实验台上,将两相吸收剂的吸收、解吸性能与传统的单乙醇胺(MEA)吸收剂进行了对比;并研究了不同吸收剂摩尔浓度变化对吸收剂性能的影响。结果显示:相比于MEA,所选用的两相吸收剂具有更高的循环负载量、循环吸收容量和循环效率,但其吸收速率较低。Liquid-liquid biphasic solvent can reduce the energy consumption during CO2 capture. Previous solvent screening was used to select two biphasic solvents, DMBA （N, N dimethylbutylamine） and TEA （triethylamine）. Analysis of the individual loadings in the upper and lower phases shows the basic characteristics of the biphasic solvents. Further solvent screening compares the absorption and desorption characteristics of these biphasic solvents and the traditional MEA （monoethanolamine） solvent to investigate the influence of solvent concentration. The results show that the biphasic solvents have higher cyclic loading, cyclic capacity, cyclic efficiency, and lower reaction rates than MEA.

关 键 词：CO2捕集 两相吸收剂 吸收 解吸 

分 类 号：TQ413[化学工程]