Molecular-Sieving Separation of Methanol/Benzene Azeotrope by a Flexible Metal-Organic Framework

被引：20

作者：

Zhou, Mu-Yang ^{[1
]}

Zhang, Xue-Wen ^{[1
]}

Yi, Heng ^{[1
]}

Wang, Zhi-Shuo ^{[1
]}

Zhou, Dong-Dong ^{[1
]}

Lin, Rui-Biao ^{[1
]}

Zhang, Jie-Peng ^{[1
]}

Chen, Xiao-Ming ^{[1
]}

机构：

[1] Sun Yat Sen Univ, Sch Chem, GBRCE Funct Mol Engn, MOE,Key Lab Bioinorgan & Synthet Chem,IGCME, Guangzhou 510275, Peoples R China

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2024年 / 146卷 / 19期

基金：

中国国家自然科学基金;

关键词：

WATER; ADSORPTION; CRYSTAL;

D O I：

10.1021/jacs.3c13480

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Separation of methanol/benzene azeotrope mixtures is very challenging not only by the conventional distillation technique but also by adsorbents. In this work, we design and synthesize a flexible Ca-based metal-organic framework MAF-58 consisting of cheap raw materials. MAF-58 shows selective methanol-induced pore-opening flexibility. Although the opened pores are large enough to accommodate benzene molecules, MAF-58 shows methanol/benzene molecular sieving with ultrahigh experimental selectivity, giving 5.1 mmol g(-1) high-purity (99.99%+) methanol and 2.0 mmol g(-1) high-purity (99.97%+) benzene in a single adsorption/desorption cycle. Computational simulations reveal that the preferentially adsorbed, coordinated methanol molecules act as the gating component to selectively block the diffusion of benzene, offering a new gating adsorption mechanism.

引用

页码：12969 / 12975

页数：7