CO2 氨基离子液体混合物的水溶性:用AMP和MAPA混合物的实验数据和用修改的肯特-艾森伯格模型进行建模
Giannis Kontos1, Ioannis Tsivintzelis1
1Department of Chemical Engineering, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.
Molecules (Basel, Switzerland)
|September 27, 2025
概括
将离子液体与胺混合,可以改善二氧化碳 (CO2) 捕获溶剂. 胆甘氨酸混合物增强了二氧化碳的溶解性,降低了蒸汽压力,为减少二氧化碳的传统类胺提供了更绿色的替代方案.
科学领域:
- 化学工程是化学工程的重要组成部分.
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
背景情况:
- 基于甲胺的二氧化碳 (CO2) 捕获已经成熟,但受到溶剂损失,高再生能量和腐蚀的影响.
- 离子液体 (ILs) 提供了一个替代品,但面临着高粘度和生产成本的挑战.
- 将IL与氨基混合为克服这些局限性的有希望的策略.
研究的目的:
- 为了研究特定的离子液体与氨基的水性混合物的二氧化碳捕获性能.
- 评估IL替代对二氧化碳吸收,溶解度和溶剂性能的影响.
- 模拟和预测这些新型二氧化碳捕获溶剂的行为.
主要方法:
- 在水性混合物中的CO2溶解度的实验性确定1--3-甲基利米达硫酸 (Bmim+HSO4-) 与2-氨基-2-甲基-1-醇 (AMP) 和3-甲基氨基) 胺 (MAPA).
- 在胆甘氨酸 (Ch+Gly-) 与AMP的水性混合物中实验性地确定CO2溶解度.
- 使用修改的肯特-艾森伯格方法对二氧化碳可溶性的建模.
主要成果:
- 用Bmim+HSO4替换氨基,由于基本性降低,每mol氨基的二氧化碳吸收减少.
- 通过改善物理和化学相互作用,用Ch+Gly-增强的每mol氨酸二氧化碳可溶性取代氨.
- 用 Ch+Gly-降低的溶剂蒸汽压力取代水,而不会显著改变散装 CO2 的溶解度,同时保持无毒性.
结论:
- 基于胆甘氨酸的混合物显示了增强的二氧化碳捕获性能和降低的蒸汽压力,呈现出一个有希望的,对环境无害的替代品.
- 修改后的肯特-艾森伯格模型准确地预测了这些IL-胺混合物的实验数据.
- 在相关的二氧化碳部分压力下低的未反应氨基含量表明有效的捕获,通过碳酸盐水解和分子二氧化碳溶解在更高的压力下可溶性增加.
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