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调节相互透的多孔框架的动力学,用于逆C₂H₆/C₂H₄在高温下进行分离

Wei Yang¹, Jiaqi Wang¹, Kui Tan²

¹State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing, 211816, China.

Angewandte Chemie (International ed. in English)

|February 24, 2025

概括

一个新的键框架,NTU-101-NH2,选择性地从乙烯混合物中吸附乙. 这一突破使得在高温下生产高纯度乙烯成为可能,从而降低了能源消耗.

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.
吸附科学吸附科学

背景情况:

从乙烯 (C2H4) 中选择性吸附乙 (C2H6),对于生产高纯度的C2H4.4至关重要.
由于C2H6和C2H4具有相似的分子性质,这对我们来说是一个巨大的挑战,尤其是在节能有利的更高温度下.

研究的目的:

开发一种新方法来调节气体分离的结交互透框架中的温度依赖动态.
研究NTU-101-NH2在高温下对选择性乙吸附和乙烯净化的性能.

主要方法:

设计和合成一个单一的H键连接的相互透的多孔框架,NTU-101-NH2.2.
评估框架的结构动力学和吸附特性,以应对C2H6和C2H4在不同温度下.
用前体框架 (NTU-101) 进行比较分析,该框架由三个H键连接在一起.

主要成果:

通过选择性吸附C2H6.2,NTU-101-NH2证明了在328K时产生聚合物级C2H4 (15.7毫升g-1) 的创纪录能力,通过选择性吸附C2H6.
框架的结构动态,由弱刺激触发,允许在更高的温度下优化吸附.
NTU-101-NH2表现出强大的循环分离性能,与NTU-101不同,NTU-101在293 K.表现出适度的分离 (10.2 mL g-1).

结论:

这项工作介绍了第一个用于在高温下直接净化C2H4的吸附剂.
对结框架的洞察力为设计材料提供了一条途径,以减少能源需求来挑战分离.

关键词:

升高的温度升高的温度.结合的相互透的框架.反向的C2H6/C2H4分离方式调节动态的调节动态.

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