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Highly selective, high capacity separation of o-xylene from C8 aromatics by a switching adsorbent layered material
Date
2019
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 oâ xylene from other C8 aromatics involves the study of a known nonporous layered material, [Co(bipy)2(NCS)2]n (sqlâ 1â Coâ NCS), which can reversibly switch to C8 aromatics loaded phases with different switching pressures and kinetics, manifesting benchmark oâ xylene selectivity (SOX/EBâ 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.
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Description
peer-reviewed
Publisher
John Wiley & Sons, Inc.
Citation
Angewandte Chemie;20 (3), pp. 6630-6634
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Zaworotko_2019_Highly.pdf
Adobe PDF, 1.58 MB
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Funding Information
Science Foundation Ireland (SFI)