增强PI膜的乙烯/乙选择性,并添加功能化地酸盐
Soon Hyeong So1, TaeHoon Kim2, Minsu Kim1
1Department of Chemical and Biomolecular Engineering, Yonsei University, Yonsei-ro 50, Seodaemun-gu, Seoul, 03722, Republic of Korea.
这项研究通过在混合矩阵膜 (MMM) 中使用功能化热酸填充剂来增强乙烯/乙分离. f-MOR焦酸填充剂显著改善了聚胺膜中的乙烯透性和选择性.
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.
- 分离科学 分离科学
背景情况:
- 混合矩阵膜 (MMM) 对于气体分离至关重要,但它们在乙烯/乙分离中的应用有限.
- 聚胺膜往往难以实现C2H4/C2H6分离的高选择性.
研究的目的:
- 为了研究将功能化热填充剂纳入6FDA-DAM聚胺膜以改善乙烯/乙烯分离的效果.
- 为了评估4-甲基基功能化MOR (f-MOR) 焦质作为增强C2H4/C2H6分离的填充剂的性能.
主要方法:
- 混合矩阵膜 (MMM) 的制造,使用6FDA-DAM聚胺矩阵和焦化物填充剂 (f-MOR和整洁的MOR).
- 对乙烯/乙混合物的MMM的气体分离性能的表征.
- 填充剂类型和度 (20%重量) 对透性和选择性的影响分析.
主要成果:
- 加入20%的f-MOR显著增加了C2H4的透性 (增加63%) 和理想的选择性 (增加11%),分别为22.7巴雷尔和5.2.
- 清洁的MOR填充剂增加了C2H4的透性,但选择性降低到3.1.
- 在f-MOR MMM中增强的选择性归因于乙烯溶解度的增加,而不是扩散.
结论:
- 功能化的化物填充剂,特别是f-MOR,可以提高基于聚胺的MMM中的乙烯/乙烯分离性能.
- 该研究表明,将吸附剂功能集成到用于C2碳化合物分离的膜中的潜力.
- 需要进一步的策略来克服诸如低压塑化等实际应用的挑战.
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