Please use this identifier to cite or link to this item: https://doi.org/10.1021/acssuschemeng.9b00062
Title: Pore Size Reduction in Zirconium Metal-Organic Frameworks for Ethylene/Ethane Separation
Authors: Wang, Yuxiang 
Yuan, Shuai
Hu, Zhigang 
Kundu, Tanay 
Zhang, Jian 
Peh, Shing Bo 
Cheng, Youdong 
Dong, Jinqiao 
Yuan, Daqiang
Zhou, Hong-Cai
Zhao, Dan 
Keywords: Science & Technology
Physical Sciences
Technology
Chemistry, Multidisciplinary
Green & Sustainable Science & Technology
Engineering, Chemical
Chemistry
Science & Technology - Other Topics
Engineering
Zr metal-organic frameworks
Ultramicropores
Pore size engineering
Ethylene/ethane adsorptive separation
Synergistic enthalpic and entropic effects
HIGHLY SELECTIVE ADSORPTION
OLEFIN-PARAFFIN SEPARATION
ETHANE
NANOSHEETS
PROPYLENE
MEMBRANES
FE
NI
CO
Issue Date: 1-Apr-2019
Publisher: AMERICAN CHEMICAL SOCIETY
Citation: Wang, Yuxiang, Yuan, Shuai, Hu, Zhigang, Kundu, Tanay, Zhang, Jian, Peh, Shing Bo, Cheng, Youdong, Dong, Jinqiao, Yuan, Daqiang, Zhou, Hong-Cai, Zhao, Dan (2019-04-01). Pore Size Reduction in Zirconium Metal-Organic Frameworks for Ethylene/Ethane Separation. ACS SUSTAINABLE CHEMISTRY & ENGINEERING 7 (7) : 7118-7126. ScholarBank@NUS Repository. https://doi.org/10.1021/acssuschemeng.9b00062
Abstract: © 2019 American Chemical Society. Engineering metal-organic frameworks (MOFs) for adsorptive ethylene/ethane separation has shown bright prospects for replacing the energy-intensive cryogenic distillation process. Herein, we demonstrate that pore size reduction in zirconium metal-organic frameworks (Zr-MOFs) can significantly improve their ethylene/ethane separation performance. Two Zr-MOFs based on the acetylenedicarboxylate ligand, UiO-66-ADC and NUS-36, are successfully synthesized. Different from UiO-66-ADC with an fcu topology, NUS-36 possesses a bcu network constructed from 8-connected Zr clusters and organic linkers, leading to ultramicropores smaller than 3.6 Å. NUS-36 selectively adsorbs C 2 H 4 over C 2 H 6 with a selectivity of 4.1 based on idea adsorbed solution theory (IAST) for an equimolar C 2 H 4 /C 2 H 6 mixture at 298 K and 1 bar, contrasting the C 2 H 6 /C 2 H 4 selectivity of 1.8 in UiO-66-ADC under the same conditions. The enhanced C 2 H 4 affinity of NUS-36 is attributed to the synergistic enthalpic and entropic effects on gas sorption which are triggered by the congested pore environment. This study demonstrates the effectiveness of the pore size reduction strategy for the design and engineering of suitable MOFs for demanding gas separation processes.
Source Title: ACS SUSTAINABLE CHEMISTRY & ENGINEERING
URI: https://scholarbank.nus.edu.sg/handle/10635/169833
ISSN: 21680485
DOI: 10.1021/acssuschemeng.9b00062
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