Phase change solvents have a great potential to reduce the energy consumption in the CO₂ capture process. In this work, a class of novel phase change solvents composed of ionic liquids with some solvents are developed and the performances for capturing CO₂ are investigated. Such a class of phase change solvents present very competitive CO₂ capture capability, e.g., the CO₂ capacity by [TETA]Br-PMDETA-water system is high to 2.631 mol CO₂/L under the conditions of 303 K, 4 M, [TETA]Br and PMDETA mole ratio 3:7, while avoid the solvent loss, a major problem in traditional phase change solvents, because ionic liquids are not volatile. Further, the phase change solvents can be regenerated at 423 K and the regeneration efficiency remains above 95% after four cycles. The absorption and phase transition mechanism are revealed with ¹³C NMR, and such a high capture capability is ascribed to the mutual promoting effect of [TETA]Br and PMDETA.

相变溶剂具有巨大的潜力，可以减少CO ₂捕集过程中的能耗。在这项工作中，开发了一类由离子液体和一些溶剂组成的新型相变溶剂，并研究了其捕获CO ₂的性能。这样一类的相变的溶剂的存在非常有竞争力的CO ₂捕获能力，例如，CO ₂容量由[TETA] BR-PMDETA -水体系为高至2.631摩尔CO ₂在303 K，4 M，TEBr和PMDETA摩尔比为3：7的条件下，L / L避免了溶剂损失，这是传统相变溶剂的一个主要问题，因为离子液体不易挥发。此外，相变溶剂可以在423 K下再生，并且在四个循环后再生效率保持在95％以上。通过¹³ C NMR揭示了吸收和相变机理，并且如此高的捕获能力归因于[TETA] Br和PMDETA的相互促进作用。