填料吸收塔内乙醇胺溶液吸收CO_2增强因子  

Enhancement factor of CO_2 absorption by ethanolamine aqueous solution in packed tower

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

机构地区：[1]北京科技大学机械工程学院,北京100083

出　　处：《化工学报》2014年第8期3054-3061,共8页CIESC Journal

基　　金：国家高技术研究发展计划项目(2012AA101802-3)~~

摘　　要：醇胺溶液吸收CO2是沼气提纯领域重要的研究课题。在实验填料吸收塔中,以NaOH水溶液吸收低浓度CO2的实验结果估算了填料的有效相界面积,建立了乙醇胺(MEA)溶液吸收高浓度CO2增强因子的数学模型,并从数学模型和实验的角度研究了MEA浓度、进气流率、CO2浓度等工艺参数对MEA吸收CO2增强因子的影响。结果表明,增强因子数学模型计算值与实验值能够良好吻合,MEA吸收CO2化学反应增强因子随进气CO2浓度增加而降低,随MEA浓度增加而增加,随进气流率增加而减小。CO2 absorption by aqueous alkanolamine solution is an important research topic in the field of biogas purification. A packed tower was used to investigate the CO2 absorption by ethanolamine （MEA） solutions. The effective gas-liquid interfacial area was calculated from the experimental results of CO2 absorption by sodium hydroxide aqueous solutions. A mathematical model was proposed to calculate the enhancement factor of the CO2 absorption of relatively high concentration by MEA aqueous solutions. The influence of various technological parameters on the enhancement factor of CO2 absorption by MEA was analyzed from the two aspects of mathematical model and experiment, including gas flow rate, MEA concentration and CO2 concentration. The results show that the model predictions are in good agreement with the experimental values. The enhancement factor of CO2 absorption by MEA increases with the increment of MEA concentration and decreases with the increment of CO2 concentration and gas flow rate.

关 键 词：沼气提纯 填料塔 乙醇胺 吸收 二氧化碳 模型 增强因子 

分 类 号：TQ028.2[化学工程]