Capturing of waste CO₂, particularly from large industrial point sources, is necessary for either permanent storage or CO₂ utilization. Amine solvents used for carbon capture have certain drawbacks, particularly the high energy required by the reboiler for solvent regeneration and degradation of the amine with absorption/regeneration cycling. These challenges may be overcome using ionic liquids (ILs) that can be tailored for operating under typical flue gas stream conditions (8–10 % CO₂, 18–20 % H₂O, 2–3 % O₂, and 67–72 % N₂). ILs, however, oftentimes suffer from high viscosities, leading to diffusion limitations when compared to amine solvents. This work models the combinations of aprotic heterocyclic anion ILs (AHA-IL) with monoethanolamine (MEA) and studies the carbon capture effectiveness of these mixtures. This study found that all AHA-IL/MEA mixtures exhibited 32 % lower enthalpy of reaction (compared to MEA) and 64 % lower viscosity (compared to AHA-IL), which are desirable characteristics for CO₂ capture solvents.

收集废物CO ₂，​​特别是来自大型工业点源的废物CO 2 ，​​对于永久储存或CO ₂利用是必要的。用于碳捕获的胺溶剂具有某些缺点，特别是再沸器用于溶剂再生和吸收/再生循环的胺降解所需的高能量。使用离子液体 (IL) 可以克服这些挑战，离子液体可针对典型烟气流条件（8–10 % CO ₂、18–20 % H ₂ O、2–3 % O ₂和 67–72 ％N ₂ )。然而，离子液体通常粘度较高，与胺溶剂相比会导致扩散限制。这项工作模拟了非质子杂环阴离子离子液体 (AHA-IL) 与单乙醇胺 (MEA) 的组合，并研究了这些混合物的碳捕获效率。这项研究发现，所有 AHA-IL/MEA 混合物的反应焓降低了 32%（与 MEA 相比），粘度降低了 64%（与 AHA-IL 相比），这是 CO ₂捕获溶剂的理想特性。