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提高CO₂/N₂和CO₂/CH₄ PES/SAPO-34膜的分离特性,使用基于胆的深层欧特基溶剂作为添加剂

Jonathan S Cardoso¹, Zhi Lin², Paulo Brito^3,4

¹Chemical Engineering and Renewable Resources for Sustainability (CERES), Department of Chemical Engineering, Faculty of Sciences and Technology, University of Coimbra, Pólo II, Rua Sílvio Lima, 3030-790 Coimbra, Portugal.

|November 26, 2024

概括

深度环氧化溶剂 (DES) 增强聚硫/SAPO-34混合矩阵膜,用于二氧化碳分离. 最佳的5重%的CHCl-甘油添加剂可将二氧化碳的透度提高200%,同时保持选择性,达到89.7.7的CO2/CH4选择性.

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:

二氧化碳 (CO2) 的分离对于缓解气候变化至关重要.
混合矩阵膜 (MMM) 通过将有机和无机材料结合起来,为高效的气体分离提供了一个有希望的方法.
在MMM中,在聚合物矩阵和无机填充剂之间实现良好的兼容性存在挑战.

研究的目的:

调查使用深度环氧溶剂 (DES) 作为添加剂,以提高聚硫 (PES) /SAPO-34 MMM 在二氧化碳分离中的性能.
优化PES/SAPO-34 MMMs中基于胆化物DES的度,以提高CO2的透性和选择性.
评估DES添加对膜结构,热性能和气体分离性能的影响.

主要方法:

使用干凝方法合成SAPO-34晶体.
制备PES/SAPO-34 MMMs,其中含有不同度 (5%和10%的重量%) 的CHCl-糖.
使用里叶变换红外光谱 (FTIR),动态机械热分析 (DMTA) 和扫描电子显微镜 (SEM) 进行MMM的表征.
对准备的膜进行理想气体 (CO2,N2,CH4) 透度的测量.

主要成果:

添加5%重量的ChCl-糖醇显著增加了200%的CO2透性,而不会影响CO2/N2选择性.
PES/SAPO-34/ChCl-糖醇MMM获得了89.7.7的卓越的CO2/CH4理想选择性.
FTIR证实了糖醇的存在,DMTA表明在5重%的DES下对膜灵活性没有不良影响,SEM显示膜形态得到改善.

结论:

基于胆化物的DES是提高PES/SAPO-34 MMM在CO2分离中的性能的有效添加剂.
最佳的DES度 (重量5%) 提高了二氧化碳的透性和选择性,提供了具有成本效益和环保的解决方案.
需要进一步的研究来探索更高的DES度及其对长期膜稳定性和工业应用的影响.

关键词:

这就是 PES PES PES 的原因.这是SAPO-34的产品.深层欧性溶剂深层欧性溶剂界面上的空洞.混合矩阵膜的混合矩阵膜.

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