Abstract Vapour-liquid equilibrium of carbon dioxide loaded potassium and sodium l -lysine salts have been investigated in the region of high-pressure and high loadings. The equilibrium solubility of carbon dioxide was measured in separate aqueous l -lysine alkaline salts for a range of temperature (303.15–363.15 K), solution concentrations (1.0–3.0 M) and pressure (95–4204 kPa). In addition to that, solubility of carbon dioxide in blends of both aforementioned amino acid salts with piperazine were investigated. All the studied solutions exhibited an increase in the carbon dioxide loading values with increase in the pressure and had a negative relationship with increase in the temperature and solvent concentration. Furthermore, the experimental data was correlated by the Kent-Eisenberg model. The correlated values shows a good agreement (AAD% of 5.15%) with experimental values. The regressed parameters of the model allows satisfactory estimation of the loadings of carbon dioxide in all studied solutions, for parametric studies. The study shows that l -lysine salts are potential green solvents for the carbon dioxide capture at high pressure.

中文翻译：

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新型吸收剂赖氨酸盐与哌嗪水溶液中 CO2 溶解度的高压实验和理论研究

摘要 在高压和高负载区域研究了负载二氧化碳的L-赖氨酸钾盐和钠盐的气液平衡。在温度 (303.15–363.15 K)、溶液浓度 (1.0–3.0 M) 和压力 (95–4204 kPa) 的范围内，在单独的 l-赖氨酸碱性盐水溶液中测量二氧化碳的平衡溶解度。除此之外，研究了二氧化碳在上述两种氨基酸盐与哌嗪的混合物中的溶解度。所有研究的溶液都表现出二氧化碳负载值随着压力的增加而增加，并与温度和溶剂浓度的增加呈负相关。此外，实验数据通过 Kent-Eisenberg 模型相关联。相关值显示出良好的一致性（AAD% 为 5。15%) 与实验值。对于参数研究，模型的回归参数允许对所有研究溶液中二氧化碳的负载量进行令人满意的估计。该研究表明，L-赖氨酸盐是用于在高压下捕获二氧化碳的潜在绿色溶剂。