Abstract:

Amino acid ionic liquid adsorbs CO₂ rapidly and N-methyldiethanolamine (MDEA)has high CO₂ absorption load.Therefore, tetramethylammonium glycinate (［N₁₁₁₁］［Gly］)was synthesized and mixed with N-methyldiethanolamine (MDEA)aqueous solutions to form complex absorbents.The CO₂ absorption capabilities of the complex absorbents were measured with the constant volume method.The results indicated that the absorption capacity per volume increased with CO₂ pressure and concentration of ［N₁₁₁₁］［Gly］, while the mole absorptivity at absorption equilibrium was independent of ［N₁₁₁₁］［Gly］ concentration under different CO₂ pressures.The absorption of CO₂ was also performed in a countercurrent falling film column, showing that the concentration of ［N₁₁₁₁］［Gly］

摘要：

氨基酸离子液体对CO₂吸收速度快，而N-甲基二乙醇胺（MDEA）有较高的CO₂吸收负荷，因此选用四甲基铵甘氨酸（［N₁₁₁₁］［Gly］）与MDEA水溶液复配成混合吸收剂用于CO₂的降膜吸收。用恒定容积法研究了混合吸收剂吸收CO₂的性能，实验结果显示，提高CO₂分压和增大［N₁₁₁₁］［Gly］浓度均能提高混合吸收剂对