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

Shi Qiang Wang; Soumya Mukherjee; Ewa Patyk-Kaźmierczak; Shaza Darwish; Alankriti Bajpai; Qing Yuan Yang; Michael J. Zaworotko

doi:10.1002/anie.201901198

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

Shi Qiang Wang
, Soumya Mukherjee
, Ewa Patyk-Kaźmierczak
, Shaza Darwish
, Alankriti Bajpai
, Qing Yuan Yang
, Michael J. Zaworotko

University of Limerick

Research output: Contribution to journal › Article › peer-review

Abstract

Purification of the C₈ 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 C₈ aromatics has long been suggested as an energy efficient solution but no physisorbent has yet combined high selectivity (>5) with high adsorption capacity (>50 wt %). Now a counterintuitive approach to the adsorptive separation of o-xylene from other C₈ 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 C₈ aromatics loaded phases with different switching pressures and kinetics, manifesting benchmark o-xylene selectivity (S_OX/EB≈60) and high saturation capacity (>80 wt %). Structural insight into the observed selectivity and capacity is gained by analysis of the crystal structures of C₈ aromatics loaded phases.

Original language	English
Pages (from-to)	6630-6634
Number of pages	5
Journal	Angewandte Chemie - International Edition
Volume	58
Issue number	20
DOIs	https://doi.org/10.1002/anie.201901198
Publication status	Published - 13 May 2019

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy
SDG 9 Industry, Innovation, and Infrastructure

Keywords

C aromatics
nonporous layered materials
physisorptive separation
square lattice coordination networks
switching behavior

Access to Document

10.1002/anie.201901198

Cite this

@article{0aacad458db34ded95497ed5e2d61f6f,

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

abstract = "Purification of the C8 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 C8 aromatics has long been suggested as an energy efficient solution but no physisorbent has yet combined high selectivity (>5) with high adsorption capacity (>50 wt \%). Now a counterintuitive approach to the adsorptive separation of o-xylene from other C8 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 C8 aromatics loaded phases with different switching pressures and kinetics, manifesting benchmark o-xylene selectivity (SOX/EB≈60) and high saturation capacity (>80 wt \%). Structural insight into the observed selectivity and capacity is gained by analysis of the crystal structures of C8 aromatics loaded phases.",

keywords = "C aromatics, nonporous layered materials, physisorptive separation, square lattice coordination networks, switching behavior",

author = "Wang, \{Shi Qiang\} and Soumya Mukherjee and Ewa Patyk-Ka{\'z}mierczak and Shaza Darwish and Alankriti Bajpai and Yang, \{Qing Yuan\} and Zaworotko, \{Michael J.\}",

note = "Publisher Copyright: {\textcopyright} 2019 Wiley-VCH Verlag GmbH \& Co. KGaA, Weinheim",

year = "2019",

month = may,

day = "13",

doi = "10.1002/anie.201901198",

language = "English",

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T1 - Highly Selective, High-Capacity Separation of o-Xylene from C8 Aromatics by a Switching Adsorbent Layered Material

AU - Wang, Shi Qiang

AU - Mukherjee, Soumya

AU - Patyk-Kaźmierczak, Ewa

AU - Darwish, Shaza

AU - Bajpai, Alankriti

AU - Yang, Qing Yuan

AU - Zaworotko, Michael J.

PY - 2019/5/13

Y1 - 2019/5/13

N2 - Purification of the C8 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 C8 aromatics has long been suggested as an energy efficient solution but no physisorbent has yet combined high selectivity (>5) with high adsorption capacity (>50 wt %). Now a counterintuitive approach to the adsorptive separation of o-xylene from other C8 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 C8 aromatics loaded phases with different switching pressures and kinetics, manifesting benchmark o-xylene selectivity (SOX/EB≈60) and high saturation capacity (>80 wt %). Structural insight into the observed selectivity and capacity is gained by analysis of the crystal structures of C8 aromatics loaded phases.

AB - Purification of the C8 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 C8 aromatics has long been suggested as an energy efficient solution but no physisorbent has yet combined high selectivity (>5) with high adsorption capacity (>50 wt %). Now a counterintuitive approach to the adsorptive separation of o-xylene from other C8 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 C8 aromatics loaded phases with different switching pressures and kinetics, manifesting benchmark o-xylene selectivity (SOX/EB≈60) and high saturation capacity (>80 wt %). Structural insight into the observed selectivity and capacity is gained by analysis of the crystal structures of C8 aromatics loaded phases.

KW - C aromatics

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KW - physisorptive separation

KW - square lattice coordination networks

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