Pore Space Partition within a Metal-Organic Framework for Highly Efficient C2H2/CO2 Separation

Published

March 14, 2019

Author(s)

Yingxiang Ye, Zhenlin Ma, Rui-Biao Lin, Rajamani Krishna, Wei Zhou, Quanjie Lin, Zhangjing Zhang, Shengchang Xiang, Banglin Chen

Abstract

The pore space partition (PSP) approach has been employed to realize a novel porous MOF (FJU-90) with dual functionalities for the challenging C₂H₂/CO₂ separation under ambient conditions. By virtue of a triangular ligand (Tripp = 2,4,6-tris-(4-pyridyl)pyridine), the cylindrical channels in the original FJU-88 have been partitioned into uniformly interconnected pore cavities, leading to the dramatically reduced pore apertures from 12.0 x 0.4 angstrom}² to 5.4 x 5.1 angstrom}². Narrowing down the pore sizes, the resulting activated FJU-90a takes up a very high amount of C₂H₂ of 180 cm³g^-1 but much less of CO₂ of 103 cm³ g^-1 at 298 K and 1 bar, demonstrating it as the best porous MOF material for this C₂H₂/CO₂ (50%:50%) separation in terms of the C₂H₂ gravimetric productivity, IAST calculations, molecular modeling studies, simulated and experimental breakthrough experiments comprehensively demonstrate that the pore space partition strategy is a very powerful approach to construct MOFs with dual functionalities for the challenging gas separation.

Citation

Journal of American Chemical Society

Volume

141

Issue

9

Pub Type

Journals

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Keywords

Porous materials, Gas separation

Citation

Ye, Y. , Ma, Z. , Lin, R. , Krishna, R. , Zhou, W. , Lin, Q. , Zhang, Z. , Xiang, S. and Chen, B. (2019), Pore Space Partition within a Metal-Organic Framework for Highly Efficient C₂H₂/CO₂ Separation, Journal of American Chemical Society, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=927568 (Accessed June 17, 2024)