微微多孔细聚合物膜用于区分H2和CO2
Xueru Yan1,2, Tianqi Song3, Min Li1,2
1Chemical Engineering Research Center, School of Chemical Engineering and Technology, Tianjin University, 300072, Tianjin, China.
Nature communications
|January 20, 2024
概括
新的超薄聚合物膜实现了净化和二氧化碳捕获的高选择性. 这些先进的材料为工业应用提供精确的分子选.
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.
- 分离科学 分离科学
背景情况:
- 现有的聚合物膜缺乏在工业条件下同时净化和捕获二氧化碳所需的性能.
- 对于能够对气体分离进行精确分子分辨的先进的膜材料有着至关重要的需求.
研究的目的:
- 开发具有高透性和选择性的超薄聚合物膜,用于高效的 (H2) 净化和二氧化碳 (CO2) 捕获.
- 在高分子膜中设计精确的分子选能力,用于苛刻的工业应用.
主要方法:
- 通过可控转化氨基链聚合物 (ALP) 薄膜,制造超薄 (13-30 nm) 聚合物膜.
- 将ALP薄膜转化为胺和胺结合聚合物 (BIALP) 层,以创建次微孔.
- 在行业相关的条件下,包括高压和高温,表征膜性能.
主要成果:
- 实现了前所未有的H2 / CO2选择性120的H2透率为315 GPU.
- 证明了高达300°C的优异热稳定性和高达11bar的高压耐受性.
- 成功创建了超薄的BIALP膜,具有精确的分子选能力.
结论:
- 开发的BIALP膜为同时净化H2和捕获CO2提供了一个有前途的解决方案,性能优越.
- 这项工作提出了一个新的概念,用于设计先进的多孔聚合物膜,以在气体分离中进行精确的分子歧视.
- 膜的高选择性,透性和稳定性为其在工业气体分离过程中的应用开辟了道路.
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