Intensification of dimethyaminoethoxyethanol on CO2 absorption in ionic liquid of amino acid
Intensification of dimethyaminoethoxyethanol on CO2 absorption in ionic liquid of amino acid
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DOI：
10.1016/j.ijggc.2016.05.013
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发表时间：
2016-08
影响因子：
3.9
通讯作者：
Feng Zhang;K. Gao;Yuning Meng;Min Qi;J. Geng;Youting Wu;Zhibing Zhang
中科院分区：
文献类型：
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作者：
Feng Zhang;K. Gao;Yuning Meng;Min Qi;J. Geng;Youting Wu;Zhibing Zhang
以甘氨酸四甲基铵（[N1111][Gly]）、一种任务特异性离子液体（TSIL）和二甲氨基乙氧基乙醇（DTH）为原料，制备了新型无水CO2吸收剂。在较宽的IL浓度（5-60 wt%）、温度（298-318 K）和CO2压力（0-300 kPa）范围内研究了CO2的吸收。发现添加的DIFFERENTIAL能够大大加速CO2吸收以及增加[N1111][Gly]中的CO2负载，因为它降低了流体粘度以及充当质子受体。CO2与IL反应并沉淀，可以从系统中除去，随后通过加热再生。在353 K时再生效率大于97%，且在下一个吸收循环中再生效率下降很小。无水CO2吸收剂具有再生效率高、再生温度低、能耗低等优点。
New anhydrous CO2absorbents were prepared with: tetramethylammonium glycinate ([N1111][Gly]), a task specific ionic liquid (TSIL), and dimethyaminoethoxyethanol (DMEE). The absorption of CO2was studied over a wide range of IL concentration (5–60 wt%), temperature (298–318 K) and CO2pressure (0–300 kPa). The addition of DMEE was found to be able to greatly accelerate the CO2absorption as well as increase CO2loading in [N1111][Gly] since it reduced the fluid viscosity as well as acted as a proton acceptor. CO2reacted with IL and precipitated and can be removed from the system and subsequently regenerated by heat. The regeneration efficiencies of the solutions at 353 K are higher than 97% and decrease very little in the next absorption circles. The anhydrous CO2absorbents showed an advantage of a higher regeneration efficiency at relatively lower temperature and less energy consumption than aqueous solutions of alkanolamines.