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定制分子扩散在核心外热酸伊米达酸框架复合物中实现了有效的西异构体的动力分离

Linghe Yang¹, Guangtong Hai², Ying Liu¹

¹Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310058, P.R. China.

Angewandte Chemie (International ed. in English)

|January 27, 2025

概括

一种新型的核心外热利性伊米达酸框架 (ZIF) 复合物,ZIF-65@ZIF-67,增强了异构体的分离. 这种材料提高了关键石化过程的选择性和扩散率.

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:

烯异构体的分离对于石化行业至关重要,但由于具有相似的分子性质,需要大量的能量.
现有的分离方法在效率和能源消耗方面面临挑战.

研究的目的:

合成和评估一种新的核心外焦利性伊米达酸框架 (ZIF) 复合物,ZIF-65@ZIF-67,用于增强西异构体的动力分离.
研究复合材料中外式扩散和核心促进的传输的协同效应.

主要方法:

合成ZIF-65@ZIF-67核心外复合材料.
蒸汽阶段和液体阶段吸附研究.
固定列突破性的实验. 固定列突破性的实验.
分子动力学模拟.分子动力学模拟.

主要成果:

与单个ZIF成分相比,ZIF-65@ZIF-67复合物显著提高了选择性和扩散率.
在液相吸附中达到高达12.5倍的对烯/正烯 (PX/OX) 选择性.
在固定列突破实验中观察到3.4倍高的动态选择性.
分子动力学模拟证实了异质的扩散控制机制.

结论:

核心的ZIF复合材料为优化分子选过程提供了一个有希望的策略.
这种方法提高了复杂的多元组件系统中的动力分离效率,特别是对于工业相关的分离.
协同作用的"外式扩散和核心促进的传输"机制是提高性能的关键.

关键词:

吸附方式吸附方式吸附方式核心外复合材料复合材料动力分离动力分离金属有机的框架.烯异构体是二氧化的异构体.

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