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对于C₂H₂/CO₂和CO₂/CH₄分离,在层状Zn-MOF中进行溶剂调节

Xingyao Zhao¹, Xiaotong Chang¹, Caixian Qin¹

¹School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao 266580, China.

Molecules (Basel, Switzerland)

|March 13, 2025

概括

两个新的金属有机框架 (MOFs),UPC-96和UPC-97,被合成为高效的乙/二氧化碳和二氧化碳/甲分离. 这些MOF表现出明显的孔隙结构,证明了它们在工业气体净化中的潜力.

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:

吸附分离技术对于工业气体净化至关重要,特别是对于C2H2/CO2和CO2/CH4混合物.
金属有机框架 (MOF) 是气体吸附和分离的有希望的先进材料,因为它们的可调节结构和高表面积.

研究的目的:

通过使用特定的配体 (TCPB-Me) 合成和表征新的基于的多层MOF (UPC-96和UPC-97).
根据pH控制的溶剂调节,研究合成的MOF的结构差异和多孔性.
评估这些MOF在选择性气体吸附和C2H2/CO2和CO2/CH4的分离方面的潜力.

主要方法:

使用溶剂调节pH值,合成了两种不同层次的Zn-MOF,UPC-96和UPC-97.
使用X射线衍射和气体吸附等热体 (N2在77K) 来确认孔隙性和结构特征.
测量了C2H2,CO2和CH4的单元气体吸附异热体,以评估分离能力.

主要成果:

通过使用1,2,4,5-tetrakis ((4-carboxyphenyl) -3,6-dimethylbenzene (TCPB-Me) 配体,成功合成了两个新的分层Zn-MOFs,UPC-96和UPC-97.
UPC-96和UPC-97呈现出不同的通道大小的永久性多孔性 (例如,UPC-96:11.6 × 7.1 Å2和8.3 × 5.2 Å2).
合成的MOF显示了C2H2,CO2和CH4的差异化吸附等温,这表明有选择性气体分离的可能性.

结论:

控制pH值的合成策略有效调整了连接体去质子化,并产生了具有明显孔隙结构的MOF.
UPC-96和UPC-97在C2H2/CO2和CO2/CH4混合物的分离方面显示出作为吸附剂的巨大潜力.
这些发现有助于开发基于MOF的先进材料,用于关键的工业气体分离工艺.

关键词:

在C2H2/CO2分离过程中.在CO2/CH4分离过程中.金属有机框架

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