Abstract The large-scale deployment of carbon dioxide (CO2) capture using aqueous amines is mainly limited by its intensive energy penalty. In this regard, non-aqueous amine solutions have high energy-saving potential because organics have lower heat capacity and vaporization enthalpy than water. In this study, 2-amino-2-methyl-1-propanol (AMP) coupled with activators in an inert organic solvent (N-methyl pyrrolidone, NMP) is proposed for energy-efficient CO2 capture. The relationships between activator properties and CO2 capture performance, such as absorption capacity, regeneration efficiency, and corrosion behavior, were investigated. The results showed that the non-aqueous AMP-AEEA (2-(2-aminoethylamino)ethanol)-NMP solution not only possessed high CO2 capacity (1.65 mol·kg−1 solution) but also retained nearly 90% of its initial CO2 capacity after the 4th cycle of regeneration. Moreover, it presented a non-corrosive behavior after saturated absorption, clearly showing its superiority over the benchmark monoethanolamine (MEA) solution. The 13C nuclear magnetic resonance (NMR) spectra provided evidence of CO2 reacting with AMP-AEEA in NMP to form carbamates, which could be easily regenerated under thermal desorption. The specific solvent loss was 0.14 kg⋅kg−1 CO2 and the total heat duty of AMP-AEEA-NMP solution was only about half that of the MEA solution, which can be attributed to the absence of water and properties of the inert organic solvent. With the perfect CO2 capture performance, non-corrosive behavior, and significant reduction of energy consumption, the novel solution is a promising candidate for CO2 capture.

中文翻译：

---

2-氨基-2-甲基-1-丙醇基非水吸收剂，用于高效、无腐蚀性的二氧化碳捕获

摘要 使用含水胺捕获二氧化碳 (CO2) 的大规模部署主要受到其密集的能量损失的限制。在这方面，非水胺溶液具有很高的节能潜力，因为有机物的热容量和蒸发焓比水低。在这项研究中，提出了在惰性有机溶剂（N-甲基吡咯烷酮，NMP）中与活化剂偶联的 2-氨基-2-甲基-1-丙醇 (AMP)，以实现高效的 CO2 捕集。研究了活化剂性能与 CO2 捕获性能之间的关系，例如吸收能力、再生效率和腐蚀行为。结果表明，非水 AMP-AEEA (2-(2-氨基乙基氨基)乙醇)-NMP 溶液不仅具有较高的 CO2 容量 (1. 65 mol·kg-1 溶液），但在第 4 次再生循环后也保留了近 90% 的初始 CO2 容量。此外，它在饱和吸收后表现出无腐蚀行为，清楚地表明其优于基准单乙醇胺 (MEA) 溶液。13C 核磁共振 (NMR) 光谱提供了 CO2 与 NMP 中的 AMP-AEEA 反应形成氨基甲酸酯的证据，该氨基甲酸酯在热解吸下很容易再生。比溶剂损失为 0.14 kg·kg−1 CO2，AMP-AEEA-NMP 溶液的总热负荷仅为 MEA 溶液的一半左右，这可归因于不存在水和惰性有机溶剂的性质. 凭借完美的 CO2 捕获性能、无腐蚀行为和显着降低能耗，