Novel Pillared-Layer-like Metal-Organic Frameworks with Quadrilateral Channels for Efficient Separation of C2H2 from C2H2/CO2 and C2H2/C2H4 Mixtures

被引：3

作者：

He, Wanrong ^{[1
]}

Mu, Xiao-Bing ^{[1
]}

Lei, Jiao ^{[1
]}

Yuan, Wenyu ^{[1
]}

Zhang, Peng ^{[1
]}

Zhai, Quan-Guo ^{[1
]}

机构：

[1] Shaanxi Normal Univ, Sch Chem & Chem Engn, Key Lab Macromol Sci Shaanxi Prov, Key Lab Appl Surface & Colloid Chem, Xian 710062, Shaanxi, Peoples R China

来源：

CRYSTAL GROWTH & DESIGN | 2023年 / 23卷 / 06期

基金：

中国国家自然科学基金;

关键词：

STEP ETHYLENE PURIFICATION; PORE-SIZE; DESIGN; ADSORPTION;

D O I：

10.1021/acs.cgd.3c00153

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The selective separation of C2H2 from C2H2/CO2 and C2H2/C2H4 is crucial but remains incrediblychallengingdue to their extremely similar physical characteristics and nearlyequivalent molecular kinetic diameters. Here, four novel pillared-layer-likemetal-organic frameworks (MOFs) with quadrilateral channels,SNNU-283-286, which consist of a unique two-dimensional wavelayer and carboxylic acid ligands as columns, are successfully synthesizedvia a facile solvothermal process. Interestingly, with the decreaseof the bent angle between two -COOH groups in ligands, thedistortion of the quadrilateral channel increases, and the two-dimensionalwave layer becomes more curving. The optimized SNNU-285 with appropriatestructural distortion exhibits remarkably high C2H2 adsorption capacity (124.6 cm(3) g(-1)), superior selectivity (20.2), and enhanced breakthrough intervaltimes (21.6 min g(-1) at 273 K) for C2H2/CO2 due to the exposed open metal site and thepolar furan ring. This work offers novel pillared-layer-like MOFswith quadrilateral channels for efficient C2H2 adsorption and purification. Aseries of novel pillar-layered metal-organic frameworkstuned by pillar angles with quadrilateral channels exhibit remarkablyhigh C2H2 adsorption capacity, superior selectivityvalues, and enhanced breakthrough interval times for C2H2/CO2 and C2H2/C2H4 separations.

引用

页码：4346 / 4356

页数：11