来自卡多聚合物的支柱式碳膜
Masoumeh Tajik1, Syed Fahad Bin Haque1, Edson V Perez1
1Department of Chemistry and Biochemistry, The University of Texas at Dallas, 800 W. Campbell Road, Richardson, TX 75080-3021, USA.
Nanomaterials (Basel, Switzerland)
|August 26, 2023
概括
含有金属有机多面体 (MOP-18) 的碳分子膜 (CMSM) 显示出增强的CO2/CH4分离性能和稳定性. 这些支柱式CMSM超越了2019年罗宾逊的上限,超越了非支柱式膜的性能.
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.
- 聚合物科学 聚合物科学
背景情况:
- 像BTDA-BAF这样的高自由体积聚合物为气体分离膜提供了潜力.
- 聚胺衍生碳分子面膜 (CMSMs) 经常遭受孔隙崩和老化,限制其性能.
- 在膜技术中,同时实现高透性和选择性仍然是一个挑战.
研究的目的:
- 开发强大的碳分子面膜 (CMSMs),提高气体分离性能和稳定性.
- 研究将金属有机多面体 (MOP-18) 纳入CMSM的结构和特性的影响.
- 评估开发的膜的CO2/CH4分离能力和耐老化能力.
主要方法:
- 通过多重凝结合成BTDA-BAF聚胺的合成.
- 通过在550°C下碳化BTDA-BAF和MOP-18/BTDA-BAF复合材料来制备CMSM.
- 膜结构的特征,包括孔隙崩和石墨板的完整性.
- 对CO2和CH4进行气体透性测试,以确定透性和选择性.
- 评价膜老化随时间的推移.
主要成果:
- 加入MOP-18和随后的铜纳米粒子形成防止了孔隙崩和膜老化.
- 支柱式CMSM实现了高的CO2透性 (12,729 Barrer) 和CH4透性 (659 Barrer),其CO2/CH4选择性为19.3.3.
- MOP-18/BTDA-BAF CMSMs的选择性已经达到2019年罗伯森上限.
- 纯BTDA-BAFCMSM的性能较低 (5337巴雷尔CO2,573巴雷尔CH4,9.3选择性),并且衰老速度明显更快.
结论:
- 金属有机多面体柱状碳分子面膜提供卓越的CO2/CH4分离性能和增强的稳定性.
- 使用MOP-18有效地减轻CMSM的孔缩和老化,从而导致持续的高选择性.
- 这些先进的CMSM为高效的天然气净化和碳捕获技术提供了有希望的方向.
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