Abstract CO2 absorption capacities in aqueous and hybrid solutions were investigated by applying a batch reactor under intermediate pressures up to 800 kPa. Tertiary alkanolamine of diethyl ethanol amine (DEEA), N-methyl di ethanol amine (MDEA), and physical solvent of sulfolane were used. Utilizing DEEA and sulfolane in the current research is considered as the first attempt to take the advantages of both chemical and physical solvents in CO2 capturing. The absorption capacities were increased by increasing the reactant concentration, pressure, and by decreasing the temperature. A higher absorption capacity was observed for the aqueous DEEA solution compared to the other solutions except in high pressures, in which the DEEA hybrid solution represented a higher capacity. Regeneration of the solutions by desorption at 80 °C revealed the effective role of the physical solvent (sulfolane) that yields higher regeneration efficiencies of absorption capacities for the hybrid solutions. The regeneration efficiencies of absorption capacity of the hybrid DEEA solution were in the range of 88.1%–99.1% while those efficiencies for the aqueous DEEA solution were in the range of 50–83.1%. These values for the hybrid and aqueous MDEA solutions were 93.4–98.8% and 85.5–94.2%, respectively. In conclusion, adding sulfolane to the aqueous DEEA solution significantly improved the absorption capacity of the regenerated solution.

中文翻译：

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DEEA/MDEA 水溶液中 CO2 的吸收/解吸及其与环丁砜的混合溶液

摘要 通过在高达 800 kPa 的中间压力下应用间歇反应器，研究了水溶液和混合溶液中的 CO2 吸收能力。使用二乙基乙醇胺(DEEA)、N-甲基二乙醇胺(MDEA)的叔烷醇胺和环丁砜的物理溶剂。在目前的研究中使用 DEEA 和环丁砜被认为是在 CO2 捕获中利用化学和物理溶剂的优势的首次尝试。通过增加反应物浓度、压力和降低温度来增加吸收能力。与除高压外的其他溶液相比，DEEA 水溶液具有更高的吸收能力，其中 DEEA 混合溶液代表更高的容量。通过在 80 °C 下解吸再生溶液，揭示了物理溶剂（环丁砜）的有效作用，它为混合溶液产生更高的吸收能力再生效率。混合 DEEA 溶液的吸收能力再生效率在 88.1%–99.1% 的范围内，而 DEEA 水溶液的再生效率在 50–83.1% 的范围内。混合和水性 MDEA 溶液的这些值分别为 93.4-98.8% 和 85.5-94.2%。总之，向 DEEA 水溶液中加入环丁砜显着提高了再生溶液的吸收能力。混合 DEEA 溶液的吸收能力再生效率在 88.1%–99.1% 的范围内，而 DEEA 水溶液的再生效率在 50–83.1% 的范围内。混合和 MDEA 水溶液的这些值分别为 93.4-98.8% 和 85.5-94.2%。总之，向 DEEA 水溶液中加入环丁砜显着提高了再生溶液的吸收能力。混合 DEEA 溶液的吸收能力再生效率在 88.1%–99.1% 的范围内，而 DEEA 水溶液的再生效率在 50–83.1% 的范围内。混合和水性 MDEA 溶液的这些值分别为 93.4-98.8% 和 85.5-94.2%。总之，向 DEEA 水溶液中加入环丁砜显着提高了再生溶液的吸收能力。