Highly Selective, High-Capacity Separation of o-Xylene from C8 Aromatics by a Switching Adsorbent Layered Material

被引：83

作者：

Wang, Shi-Qiang ^{[1
]}

Mukherjee, Soumya ^{[1
]}

Patyk-Kazmierczak, Ewa ^{[1
]}

Darwish, Shaza ^{[1
]}

Bajpai, Alankriti ^{[1
]}

Yang, Qing-Yuan ^{[1
]}

Zaworotko, Michael J. ^{[1
]}

机构：

[1] Univ Limerick, Bernal Inst, Dept Chem Sci, Limerick, Ireland

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2019年 / 58卷 / 20期

基金：

爱尔兰科学基金会;

关键词：

C-8; aromatics; nonporous layered materials; physisorptive separation; square lattice coordination networks; switching behavior; METAL-ORGANIC FRAMEWORKS; CRYSTAL-STRUCTURE; COORDINATION POLYMERS; MAGNETIC-PROPERTIES; ISOMERS; ADSORPTION; COMPLEXES; PYRAZINE; MIXTURES; EXCHANGE;

D O I：

10.1002/anie.201901198

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Purification of the C-8 aromatics (xylenes and ethylbenzene) is particularly challenging because of their similar physical properties. It is also relevant because of their industrial utility. Physisorptive separation of C-8 aromatics has long been suggested as an energy efficient solution but no physisorbent has yet combined high selectivity (>5) with high adsorption capacity (>50wt%). Now a counterintuitive approach to the adsorptive separation of o-xylene from other C-8 aromatics involves the study of a known nonporous layered material, [Co(bipy)(2)(NCS)(2)](n) (sql-1-Co-NCS), which can reversibly switch to C-8 aromatics loaded phases with different switching pressures and kinetics, manifesting benchmark o-xylene selectivity (S-OX/EB approximate to 60) and high saturation capacity (>80wt%). Structural insight into the observed selectivity and capacity is gained by analysis of the crystal structures of C-8 aromatics loaded phases.

引用

页码：6630 / 6634

页数：5

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