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Recognition of C 4 Olefins by an Ultramicroporous ftw-Type Yttrium-Based Metal-Organic Framework with Distorted Cages
Ist Teil von
Small (Weinheim an der Bergstrasse, Germany), 2024-04, Vol.20 (14), p.e2307990
Ort / Verlag
Germany
Erscheinungsjahr
2024
Quelle
Wiley Online Library - AutoHoldings Journals
Beschreibungen/Notizen
Developing porous adsorbents for efficient separation of C
olefins is significant but challenging in the petrochemical industry due to their similar molecular sizes and physical properties. The separation efficiency is often limited when separating C
olefins by a single separation mechanism. Herein, an ultramicroporous yttrium-based MOF, Y-dbai, is reported featuring cage-like pores connected by small windows, for recognition and efficient separation of C
olefins through a synergistic effect of thermodynamic and kinetic mechanisms. At 298 K and 1 bar, the adsorption capacities of Y-dbai for C
H
, 1-C
H
, and i-C
H
are 2.88, 1.07, and 0.14 mmol g
, respectively, indicating a molecular sieving effect toward i-C
H
. The C
H
/i-C
H
and 1-C
H
/i-C
H
uptake selectivities of Y-dbai are 20.6 and 7.6, respectively, outperforming most of the reported adsorbents. The static and kinetic adsorption experiments coupled with DFT calculations indicate the separation should be attributed to a combined effect of thermodynamically and kinetically controlled mechanism. Breakthrough experiments have confirmed the excellent separation capability of Y-dbai toward C
H
/1-C
H
, C
H
/i-C
H
and C
H
/1-C
H
/i-C
H
mixtures.
Sprache
Englisch
Identifikatoren
ISSN: 1613-6810
eISSN: 1613-6829
DOI: 10.1002/smll.202307990
Titel-ID: cdi_pubmed_primary_37988702
Format
–
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