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在H₂/CO₂分离的柱层金属有机框架膜中的不对称孔窗

Tao Yan^1,2, Asad Sharif¹, Zhengqing Zhang³

¹State Key Laboratory of Fine Chemicals, Institute of Adsorption and Inorganic Membrane, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China.

ACS applied materials & interfaces

|November 15, 2024

概括

一种新型的超微孔膜,Ni-LAP-NH2,被开发用于高效的H2/CO2分离. 这种金属有机框架 (MOF) 膜表现出高性能和稳定性,为工业化净化提供了潜力.

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.
纳米技术纳米技术

背景情况:

开发用于气体分离的先进膜对于工业过程至关重要.
金属有机框架 (MOF) 为选择性分子选提供可调节的孔隙结构.
柱层MOF为膜应用提供了独特的架构.

研究的目的:

为高性能气体分离制造一种新型的超微孔性柱层MOF膜 (Ni-LAP-NH2).
为了研究纳入氨基功能组对膜分离特性的影响.
评估制造膜在工业净化中的潜力.

主要方法:

在多孔α-Al2O3管上制造Ni-LAP-NH2膜,使用同结构的Ni-LAP晶体作为种子.
从pyrazine (Pz) 到aminopyrazine (Pz-NH2) 的支柱层联体的修改,以引入氨基侧组.
在最佳条件下使用H2/CO2分离试验对膜性能进行表征.

主要成果:

Ni-LAP-NH2膜表现出优异的H2/CO2分离性能,分离因子为41.7.7.
实现了9.08 × 10-8mol·m-2·s-1·Pa-1的高H2透率,表明了高效的气体运输.
氨基侧组诱导了固体阻碍和吸附亲和力,协同增强了CO2延迟.

结论:

开发的Ni-LAP-NH2 MOF膜由于其可调节的孔隙结构和稳定性,显示出了工业H2净化方面的巨大潜力.
将功能组引入柱层MOF的策略对于定制分子选能力是有效的.
这项工作为设计针对性气体分离的先进MOF膜提供了有效的方法.

关键词:

Ni-LAP-NH2 管状膜膜的使用情况.气体分离器的气体分离器金属-有机的框架.一个柱子层层的柱子.

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