Details

Autor(en) / Beteiligte

• Tu, Shi
• Yao, Jinze
• Zhao, Siyao
• Lin, Danxia
• Yu, Liang
• Zhou, Xin
• Wang, Hao
• Wu, Ying
• Xia, Qibin

Titel

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.