化反应策略构建了通用的混合矩阵复合膜,以实现高效的挥发性有机化合物吸附和CO2分离
Boyu Li1,2, Xiaohui Liu1, Xuanting He1
1State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai, 200092, China.
Small (Weinheim an der Bergstrasse, Germany)
|February 22, 2024
概括
本研究引入了一种新的混合矩阵复合膜 (MMCM),用于高效的挥发性有机化合物 (VOC) 吸附和二氧化碳 (CO2) 分离. 开发的膜在捕获VOC和选择性透CO2方面表现出很高的性能.
科学领域:
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
- 环境科学 环境科学
背景情况:
- 混合矩阵复合膜 (MMCM) 在减少挥发性有机化合物 (VOC) 排放和分离二氧化碳 (CO2) 方面至关重要.
- 设计有效的MMCM需要优化复合层,基板和填充剂-矩阵兼容性.
研究的目的:
- 开发一种高性能MMCM (UiO-66-NA@PDMS/MCE) 以同时进行VOC吸附和CO2透选择性.
- 建立一个简单的复合层的制造方法,使用化反应方法.
主要方法:
- 在基板上通过化反应制造一个复合层.
- 分子模拟以确认UiO-66-NH2和PDMS之间的兼容性.
- 气体吸附和透实验以评估性能.
- 大法典蒙特卡洛 (GCMC) 和平衡分子动力学 (EMD) 模拟以了解二氧化碳亲和力.
主要成果:
- 复合层表现出连续的形态,没有接口空隙,表明了出色的填充剂-矩阵兼容性.
- 该MMCM证明了四种挥发性有机化合物的强烈吸附,并实现了276.5GPU的高CO2透率,选择性为36.2.2.
- 挥发性有机化合物的存在增强了UIO-66-NH2的极性和孔径,改善了CO2的亲和力和透性选择性.
结论:
- 开发了一种简单有效的方法来制造具有增强VOC吸附性和CO2透性选择性的MMCM.
- UiO-66-NA@PDMS/MCE显示了环境应用的巨大潜力,特别是在排放控制和气体分离方面.
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