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基于DAP的新两相吸收剂的相变研究

Lina Gu¹, Xueyan Hou¹, Lijian Jin¹

¹Key Laboratory of Energy Thermal Conversion and Control of Ministry Education, School of Energy and Environment, Southeast University, Nanjing 210096, PR China.

The journal of physical chemistry. B

|February 8, 2024

概括

这项研究引入了一种新的二相吸收系统来捕获二氧化碳,提高吸收率和负载. 该系统使用1,3-propanediamine (DAP) 和四甲基乙二胺 (TMEDA) 与非水性溶剂,显示出比传统方法更好的性能.

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:

传统的二氧化碳吸收剂吸收速度缓慢,吸收能力低.
需要先进的吸收系统来提高二氧化碳捕获效率.

研究的目的:

开发和研究一种新的二相吸收系统,以提高二氧化碳的吸收.
探索使用非水性溶剂与1,3-propanediamine (DAP) 和四甲基乙二胺 (TMEDA) 结合用于二氧化碳捕获.

主要方法:

使用核磁共振 (NMR) 碳光谱学研究了二氧化碳吸收机制.
不同的二相吸收剂的吸收负荷,分量比和粘度的比较.
通过各种非水性溶剂吸收二氧化碳后选相分离系统.

主要成果:

DAP/TMEDA系统显示吸收负载为3.8mol/kg,超过传统的乙醇胺溶液.
该DAP/TMEDA/diglyme系统实现了3.2mol/kg的吸收负载,降低了38%的分数.
核磁共振和量子化学计算证实了碳酸盐的形成,DAP是主要的吸收剂.

结论:

开发的双相吸收系统提供了更好的二氧化碳吸收性能.
添加非水性溶剂可以增强相位分离,降低再生塔的大小和成本.
非水性溶剂通过盐沉加速相分离,而不会直接参与二氧化碳的吸收.

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