CO2被离子功能化深层环氧溶剂捕获: -OH组的固体阻碍的影响
Mingzhe Chen1, Shaoyu Zhang2, Qingqing Mei2
1School of Science, China University of Geosciences, Beijing 100083, China. yangdz@cugb.edu.cn.
概括
用离子液体和乙烯糖醇形成的深度环氧化溶剂 (DES) 显示出增强的二氧化碳捕获能力. 酒精的固体阻碍在这些新型DES中显著影响CO2吸收机制.
科学领域:
- 化学工程是化学工程的重要组成部分.
- 材料科学 材料科学 材料科学
- 环境科学 环境科学
背景情况:
- 离子液体 (ILs) 和深溶解剂 (DESs) 是捕获二氧化碳的有希望的材料.
- 了解影响DES中二氧化碳吸收的因素对于优化捕获效率至关重要.
研究的目的:
- 为了研究由N,N-二甲基-N-甲基-N-(2-甲基乙烯) 氨 1,2,3-三化物 ([MOEN221][Tz]) 与乙烯基醇 (EG) 或皮纳醇 (PIN) 形成的DES的二氧化碳捕获性能.
- 阐明这些DES中二氧化碳吸收机制中键和硬质效应的作用.
主要方法:
- 使用[MOEN221][Tz]与EG和/或PIN形成二进制和三进制DES.
- 在特定条件下的二氧化碳捕获能力测量.
- 谱分析 (NMR,FTIR) 和理论计算以研究相互作用.
主要成果:
- [MOEN221][Tz]-EG DES表现出明显更高的二氧化碳捕获能力 (>0.77 mol/mol) 与整洁的IL (0.32 mol/mol) 相比.
- [MOEN221][Tz]-PIN DES显示较低的二氧化碳容量 (∼0.30 mol/mol),而三元化DES ([MOEN221][Tz]-PIN-EG) 显示出比二元化[MOEN221][Tz]-PIN.EG]更强的容量.
- 受酒精-OH组的固体阻碍影响的键强度被确定为控制二氧化碳吸收的关键因素.
结论:
- 基于乙烯糖醇的DES提供了优越的二氧化碳捕获能力,相对于基于皮纳科尔的系统,由于有利的结相互作用.
- 酒精的固体效应在确定二氧化碳捕获效率和机制方面发挥着关键作用,影响二氧化碳在DES结构中的结合位置.
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