A tertiary amine-based biphasic solvent, N,N-dimethylethanolamine (DMEA)/piperazine (PZ)/N-butanol (n-BuOH)/H₂O, was proposed for energy-efficient CO₂ capture. Low energy-consuming deprotonation dominated the CO₂ desorption reaction, resulting in a Q_rxn as low as 1.17 GJ/t CO₂. Combining with the significantly reduced Q_sen and Q_latent due to phase separation, an extremely low regeneration energy consumption (1.59 GJ/t CO₂) was obtained, which was only 39.8% of 30 wt% MEA, and lower than most of reported biphasic solvents. The addition of n-BuOH not only induced the phase separation, but also reduced the activation energy of the reaction between DMEA and CO₂. It worked together with PZ to improve the inherent slow absorption rate of DMEA to a comparable value with 30 wt% MEA. Although a decreased CO₂ loading in the total solution was detected because the addition of n-BuOH reduced the equilibrium constant from 3.82 E+2 to 8.98 E+1, this biphasic solvent still achieved high CO₂-rich loading (4.23 mol/L), large desorption capacity (3.77 mol/L), and superior desorption efficiency (89.1% at 393.15 K) owing to the good phase separation and desorption properties. In addition, the corrosion rate of CO₂-rich phase was only 1.35% of CO₂-loaded MEA. This research provided a promising alternative absorbent for CO₂ capture.

提出了一种基于叔胺的双相溶剂 N,N-二甲基乙醇胺 (DMEA)/哌嗪 (PZ)/N-丁醇 ( n - BuOH)/H ₂ O，用于高效捕获CO _{2 。}低能耗去质子化在 CO ₂解吸反应中占主导地位，导致Q _rxn低至 1.17 GJ/t CO ₂。结合由于相分离而显着降低的Q _sen和Q_潜值，获得了极低的再生能耗（1.59 GJ/t CO ₂），仅为 30 wt% MEA 的 39.8%，低于大多数报道的双相溶剂。增加n_{-BuOH不仅诱导了相分离，而且降低了DMEA与CO 2}反应的活化能。它与 PZ 一起将 DMEA 的固有缓慢吸收率提高到与 30 wt% MEA 相当的值。尽管由于添加n- BuOH 将平衡常数从 3.82 E+2 降低到 8.98 E+1，因此检测到总溶液中CO _{2负载量降低，但这种双相溶剂仍然实现了高 CO 2}负载量（4.23 mol/L )、大的解吸能力 (3.77 mol/L) 和优异的解吸效率 (89.1% at 393.15 K) 由于良好的相分离和解吸性能。此外，富CO _{2相的腐蚀速率仅为CO 2的1.35%。}-加载 MEA。_{该研究为CO 2}捕获提供了一种有前途的替代吸收剂。