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首页> 外文期刊>Separation and Purification Technology >Supported ionic liquid membranes (SILMs) as a contactor for selective absorption of CO2/O-2 by aqueous monoethanolamine (MEA)
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Supported ionic liquid membranes (SILMs) as a contactor for selective absorption of CO2/O-2 by aqueous monoethanolamine (MEA)

机译：支持的离子液体膜（硅片）作为接触器，用于通过单乙醇胺水溶液选择性吸收CO 2 / O-2（MEA）

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摘要

Application of membrane contactors in a combination of monoethanolamine as a solvent system for post-combustion CO2 capture has been extensively studied in the last decades. Due to the better performance to capture CO2 at low concentration, the potentialities of novel technology of supported ionic liquids membranes (SILMs) for absorption process in gas-liquid membrane contactor system are currently being explored to improve and compliment previous technology. In this study, a modified hydrophobic gas-liquid membrane contactor system was prepared using Liqui-Cel (R) parallel flow module as a membrane support and 1-ethyl-3-methylimidazolium bis (trifluoromethylsulfonyl) imide [emim] [NTf2] ionic liquid as a supporting phase. Under moderate operating conditions, parallel flow mode and use of monoethanolamine (MEA) as an absorbent, the effects of absorbent temperature and gas velocity on the CO2 absorption efficiency and CO2/O-2 selectivity were determined using this modified module. Further investigation to compare the performances of blank and modified membrane module was implemented at different temperatures (303-348 K) and gas velocities (4.63 x 10(-6) to 3.70 x 10(-5) s(-1)). Results revealed that efficiency of the CO2 absorption process of the modified module is almost doubled with an average selectivity factor of CO2/O-2 around 5 times compared to blank contactor system. Thus, this modified membrane contactor system had shown a great potential for further used in the real industrial CO2 capture and beneficial to bottleneck the issue of MEA oxidation that usually occurred in previous gas-liquid membrane contactor system.
机译：在过去的几十年里，在燃烧后CO2捕获后单乙醇胺的组合中施加膜接触器的应用已经过度研究。由于在低浓度下捕获CO2的性能更好，目前正在探索用于气液膜接触器系统的吸收过程的负载离子液体膜（SILMS）的新技术的潜力，以改善和恭维以前的技术。在该研究中，使用Liqui-CelPration流量模块作为膜载体和1-乙基-3-甲基咪唑鎓（三氟甲基磺酰基）酰亚胺[emim] [NTF2]离子液体制备改性疏水性气体膜接触器系统作为支撑阶段。在适度的操作条件下，并联流动模式和单乙醇胺（MEA）作为吸收剂，使用该改性模块测定吸收温度和气体速度对CO 2吸收效率和CO 2 / O-2选择性的影响。进一步研究以比较坯料和改性膜组件的性能在不同温度（303-348K）和气体速度（4.63×10（-6）至3.70×10（-5）S（-1））上实现。结果表明，与坯料接触器系统相比，改性模块的CO2吸收过程的效率几乎加倍。因此，这种改进的膜接触器系统已经显示出在真实工业CO2中进一步使用的潜力，并且有利于瓶颈的瓶颈，这是通常发生在先前的气液膜接触器系统中的MEA氧化问题。

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