It has been suggested that non-aqueous solvents containing amines may provide alternatives to aqueous alkanolamine solvents due to the potentially lower energy requirement for the regeneration of the amine. This paper presents experimental data on the solubility of CO₂ and heat of absorption in the organic solvent N-methyl-2-pyrrolidone (NMP) and mixtures of 2-amino-2-methyl-1-propanol (AMP) in NMP. The solubility of CO₂ was found to be very low at temperatures above 70 °C, the temperature at which the AMP/NMP solvent can be regenerated. The solubility of CO₂ was higher at lower temperatures, particularly when precipitation of the AMP carbamate occurred. The heat of absorption in the AMP/NMP solvent decreased with increasing temperature, from approximately 90 kJ/mol CO₂ at 40 °C and low loadings, to approximately 40 kJ/mol CO₂ and 65 kJ/mol CO₂, at 88 °C and low loadings, for the 15 wt% and 25 wt% AMP in NMP solvents, respectively. The results obtained complement our previous studies, together providing comprehensive data on the vapor–liquid equilibrium and the heat of absorption of CO₂, which can be used to model the system.

已经提出，由于胺的再生可能需要较低的能量，因此含胺的非水溶剂可以提供链烷醇胺水溶液的替代品。本文介绍了在有机溶剂N-甲基-2-吡咯烷酮（NMP）和2-氨基-2-甲基-1-丙醇（AMP）混合物中的CO ₂溶解度和吸收热的实验数据。发现在高于70°C的温度（可再生AMP / NMP溶剂的温度）下，CO ₂的溶解度非常低。CO ₂的溶解度在较低温度下较高，尤其是在发生AMP氨基甲酸酯沉淀时。AMP / NMP溶剂中的吸收热随着温度的升高而降低，从40°C和低负荷下的约90 kJ / mol CO ₂降至88° C下的约40 kJ / mol CO ₂和65 kJ / mol CO ₂在NMP溶剂中分别以15 wt％和25 wt％的AMP进行C和低负载。获得的结果补充了我们以前的研究，同时提供了可用于对系统进行建模的气液平衡和CO ₂吸收热的综合数据。