当前位置：
X-MOL 学术
›
Ind. Eng. Chem. Res.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
CFD Modeling of CO2 Absorption in Membrane Contactors Using Aqueous Solutions of Monoethanolamine–Ionic Liquids
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-09-18 , DOI: 10.1021/acs.iecr.0c02242 Hassan Pahlavanzadeh 1 , Mohammad Darabi 1 , Vahid Rajabi Ghaleh 2 , Omid Bakhtiari 3
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-09-18 , DOI: 10.1021/acs.iecr.0c02242 Hassan Pahlavanzadeh 1 , Mohammad Darabi 1 , Vahid Rajabi Ghaleh 2 , Omid Bakhtiari 3
Affiliation
|
The effects of addition of an ionic liquid to pure water as a physical absorbent and monoethanolamine (MEA) solutions as a chemical absorbent on carbon dioxide (CO2) absorption through hollow fiber membrane contactors were investigated using a 2D axisymmetric model. A numerical simulation was developed based on finite element method using computational fluid dynamics techniques. Liquid phase flowed in the tube side and gas mixture containing CO2 passed in the shell side of the membrane contactor in co-current and countercurrent modes. The simulation results are consistent with experimental data, and the root-mean-square error was calculated as 9 and 13% for pure water and 25 wt % for ionic liquid solution. The results showed that addition of 1-butyl-3-methylimidazolium tetrafluoroborate ([Bmim][BF4]) to the base fluids increases CO2 absorption in both physical and chemical absorbents. However, the effects of an ionic liquid in physical absorption is higher than that in chemical absorption. Addition of 10 wt % [Bmim][BF4] to 3.5 wt % MEA solution could increase the absorption rate by 12% in countercurrent flow compared to a 6 wt % MEA solution without [Bmim][BF4] despite lower MEA concentration. Also, the results indicate that reaction term in a chemical absorbent is more important in low liquid flow rates. It can also be found that addition of 25 and 50 wt % of [Bmim][BF4] to pure water can enhance absorption performance up to 30 and 75%.
中文翻译：
单乙醇胺离子液体水溶液在膜接触器中吸收CO 2的CFD模型
使用二维轴对称模型，研究了向纯水中添加离子液体作为物理吸收剂和单乙醇胺（MEA）溶液作为化学吸收剂对中空纤维膜接触器吸收二氧化碳（CO 2）的影响。利用计算流体动力学技术，基于有限元方法进行了数值模拟。液相在管侧流动，混合气体中含有CO 2以并流和逆流方式通过膜接触器的壳侧。仿真结果与实验数据一致，纯水的均方根误差计算为9％和13％，离子液体溶液的均方根误差为25％。结果表明，向基础液中添加1-丁基-3-甲基咪唑鎓四氟硼酸酯（[Bmim] [BF 4 ]）会增加物理和化学吸收剂中的CO 2吸收。然而，离子液体在物理吸收中的作用高于在化学吸收中的作用。与不使用[Bmim] [BF 4的6 wt％MEA溶液相比，向3.5 wt％的MEA溶液中添加10 wt％[Bmim] [BF 4 ]可以在逆流中将吸收率提高12％。尽管MEA浓度较低。而且，结果表明，在低液体流速下，化学吸收剂中的反应项更为重要。还可以发现，向纯水中添加25和50 wt％的[Bmim] [BF 4 ]可以提高吸收性能，最高可达30和75％。
更新日期：2020-10-15
中文翻译：
单乙醇胺离子液体水溶液在膜接触器中吸收CO 2的CFD模型
使用二维轴对称模型，研究了向纯水中添加离子液体作为物理吸收剂和单乙醇胺（MEA）溶液作为化学吸收剂对中空纤维膜接触器吸收二氧化碳（CO 2）的影响。利用计算流体动力学技术，基于有限元方法进行了数值模拟。液相在管侧流动，混合气体中含有CO 2以并流和逆流方式通过膜接触器的壳侧。仿真结果与实验数据一致，纯水的均方根误差计算为9％和13％，离子液体溶液的均方根误差为25％。结果表明，向基础液中添加1-丁基-3-甲基咪唑鎓四氟硼酸酯（[Bmim] [BF 4 ]）会增加物理和化学吸收剂中的CO 2吸收。然而，离子液体在物理吸收中的作用高于在化学吸收中的作用。与不使用[Bmim] [BF 4的6 wt％MEA溶液相比，向3.5 wt％的MEA溶液中添加10 wt％[Bmim] [BF 4 ]可以在逆流中将吸收率提高12％。尽管MEA浓度较低。而且，结果表明，在低液体流速下，化学吸收剂中的反应项更为重要。还可以发现，向纯水中添加25和50 wt％的[Bmim] [BF 4 ]可以提高吸收性能，最高可达30和75％。
京公网安备 11010802027423号