Abstract Ammonium ionic liquids (ILs) are relatively cheap in synthesis and environmentally benign and despite that they have been very rarely used in gas separation. In this research we used several ammonium ILs as liquid membranes for removal of residual toluene from gas phase. Ionic liquids used in this study were composed of bis(trifluoromethylsulfonyl)imide anion [Tf2N] and trimethylbutylammonium [N1114], trietylbutylammonium [N2224], trietylhexylammonium [N2226], trietyloctylammonium [N2228] cations. Selected ILs formed stable membranes with limited swelling effect and good performance. The highest toluene permeability was recorded for [N2228][Tf2N] of 2666 barrers and for triethyl based ILs it was decreasing with carbon atoms number. The selectivity of toluene/N2 separation was in a range of 29–120. For better process illustration, the factors influencing the permeation process, namely viscosity and partition coefficients were examined.

中文翻译：

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使用负载型铵离子液体膜从气相中分离甲苯的有效性

摘要 铵离子液体 (IL) 的合成成本相对较低且对环境无害，尽管它们很少用于气体分离。在这项研究中，我们使用几种铵离子液体膜作为从气相中去除残留甲苯的液膜。本研究中使用的离子液体由双（三氟甲基磺酰基）亚胺阴离子 [Tf2N] 和三甲基丁基铵 [N1114]、三乙基丁基铵 [N2224]、三乙基己基铵 [N2226]、三乙基辛基铵 [N2228] 阳离子组成。选定的离子液体形成稳定的膜，具有有限的溶胀效果和良好的性能。[N2228][Tf2N] 的最高甲苯渗透率为 2666 barrers，而对于三乙基基离子液体，它随着碳原子数的增加而降低。甲苯/N2 分离的选择性在 29-120 的范围内。为了更好地说明过程，