A Robust Cage-Based Metal-Organic Framework Showing Ultrahigh SO2 Uptake for Efficient Removal of Trace SO2 from SO2/CO2 and SO2/CO2/N2 Mixtures

Meng Jia Yin; Xiao Hong Xiong; Xue Feng Feng; Wen Yuan Xu; Rajamani Krishna; Feng Luo

doi:10.1021/acs.inorgchem.1c00033

A Robust Cage-Based Metal-Organic Framework Showing Ultrahigh SO₂ Uptake for Efficient Removal of Trace SO₂ from SO₂/CO₂ and SO₂/CO₂/N₂ Mixtures

Inorg Chem. 2021 Mar 1;60(5):3447-3451. doi: 10.1021/acs.inorgchem.1c00033. Epub 2021 Feb 17.

Authors

Meng Jia Yin¹, Xiao Hong Xiong¹, Xue Feng Feng¹, Wen Yuan Xu², Rajamani Krishna³, Feng Luo¹

Affiliations

¹ School of Biology, Chemistry and Material Science, East China University of Technology, Nanchang, Jiangxi 344000, People's Republic of China.
² College of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China.
³ Van't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands.

PMID: 33595299
DOI: 10.1021/acs.inorgchem.1c00033

Abstract

Removal of trace SO₂ from an SO₂-containing product is now receiving increasing attention. However, designing a robust porous adsorbent with high SO₂ adsorption capacity and good SO₂/CO₂ selectivity, as well as validity under humid conditions, is still a challenging task. Herein, we report a porous cage-based metal-organic framework, namely ECUT-111, which contains two distinct cages with apertures of 5.4 and 10.2 Å, respectively, and shows high a BET of up to 1493 m²/g and a pore volume of 0.629 cm³/g. Impressively, ECUT-111 enables an ultrahigh SO₂ uptake of up to 11.56 mmol/g, exceeding most reported top-performing adsorbents for such a use. More importantly, complete separation of trace SO₂ from SO₂/CO₂ and SO₂/CO₂/N₂ mixtures, especially under humid conditions, and excellent recycle use were observed for ECUT-111, suggesting its superior application in desulfurization of SO₂-containing products.