Fine-Tuning of Nano-Traps in a Stable Metal-Organic Framework for Highly Efficient Removal of Propyne from Propylene

Published

April 28, 2018

Author(s)

Hui-Min Wen, Libo Li, Rui-Biao Lin, Bin Li, Bin Hu, Wei Zhou, Jun Hu, Banglin Chen

Abstract

Despite tremendous effects, precise control in the synthesis of porous materials with ideal nanocages for desired gas separation applications still remains a challenge. Microporous metal-organic frameworks (MOFs) have provided the rich chemistry to enable us precise control and design of structures, pore cavities, and functionalities at the molecular level. Here, we propose and design in microporous MOF (termed as ZJUT-1, ZJUT = Zhejiang University of Technology) with a fine-tuned nanocate, exhibiting the desired size, shape, and functionalities that are suitable for trapping a single propyne (C₃H₄) molecule. Adsorption and computational studies indicate that such optimized nanocages can not only reduce the uptake of propylene (C₃H₆), but also strengthen the C₃H₄-host interactions through multiple hydrogen-bonding between SiF₆^2-/-NH₂ and C₃H₄ molecule. This material thus shows remarkable different C₃H_{4% and C}d3^H₆ adsorption capacities, with the largest uptake ratio of 3.06 at 1 bar and 298 K, affording a very high selectivity (up to 70) for C₃H₄/C₃H₆ (1/99) separation. The actual breakthrough experiments demonstrate the ZJUT-1 can efficiently remove trace amount of C₃H₄ from the important raw C₃H₄/C₃H₆ mixtures under ambient conditions with 0.19 mmol g^-1 C₃H₄ uptake capacity to produce 99.9995% pure C₃H₆.

Citation

Journal of Materials Chemistry A

Volume

6

Issue

16

Pub Type

Journals

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Keywords

metal–organic framework, gas separation

Citation

Wen, H. , Li, L. , Lin, R. , Li, B. , Hu, B. , Zhou, W. , Hu, J. and Chen, B. (2018), Fine-Tuning of Nano-Traps in a Stable Metal-Organic Framework for Highly Efficient Removal of Propyne from Propylene, Journal of Materials Chemistry A, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=925497 (Accessed April 25, 2024)