Highly Selective and Reversible Sulfur Dioxide Adsorption on a Microporous Metal-Organic Framework via Polar Sites

Yan Zhang, Peixin Zhang, Weikang Yu, Jinghan Zhang, Jiejing Huang, Jun Wang, Mai Xu, Qiang Deng, Zheling Zeng, Shuguang Deng

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

It is very challenging to achieve efficient and deep desulfurization, especially in flue gases with an extremely low SO 2 concentration. Herein, we report a microporous metal-organic framework (ELM-12) with specific polar sites and proper pore size for the highly efficient SO 2 removal from flue gas and other SO 2 -containing gases. A high SO 2 capacity of 61.2 cm 3 ·g -1 combined with exceptionally outstanding selectivity of SO 2 /CO 2 (30), SO 2 /CH 4 (871), and SO 2 /N 2 (4064) under ambient conditions (i.e., 10:90 mixture at 298 K and 1 bar) was achieved. Notably, the SO 2 /N 2 selectivity is unprecedented among ever reported values of porous materials. Moreover, the dispersion-corrected density functional theory calculations illustrated the superior SO 2 capture ability and selectivity arise from the high-density SO 2 binding sites of the CF 3 SO 3 - group in the pore cavity (S δ+ ···O δ- interactions) and aromatic linkers in the pore walls (H δ+ ···O δ- interactions). Dynamic breakthrough experiments confirm the regeneration stability and excellent separation performance. Furthermore, ELM-12 is also stable after exposure to SO 2 , water vapor, and organic solvents.

Original languageEnglish (US)
Pages (from-to)10680-10688
Number of pages9
JournalACS Applied Materials and Interfaces
Volume11
Issue number11
DOIs
StatePublished - Mar 20 2019

Fingerprint

Sulfur Dioxide
Sulfur dioxide
Flue gases
Metals
Adsorption
Steam
Binding sites
Carbon Monoxide
Desulfurization
Organic solvents
Water vapor
Pore size
Density functional theory
Porous materials
Gases
Binding Sites
Experiments

Keywords

  • desulfurization
  • IAST selectivity
  • polar sites
  • reversible
  • SO capture

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Highly Selective and Reversible Sulfur Dioxide Adsorption on a Microporous Metal-Organic Framework via Polar Sites. / Zhang, Yan; Zhang, Peixin; Yu, Weikang; Zhang, Jinghan; Huang, Jiejing; Wang, Jun; Xu, Mai; Deng, Qiang; Zeng, Zheling; Deng, Shuguang.

In: ACS Applied Materials and Interfaces, Vol. 11, No. 11, 20.03.2019, p. 10680-10688.

Research output: Contribution to journalArticle

Zhang, Yan ; Zhang, Peixin ; Yu, Weikang ; Zhang, Jinghan ; Huang, Jiejing ; Wang, Jun ; Xu, Mai ; Deng, Qiang ; Zeng, Zheling ; Deng, Shuguang. / Highly Selective and Reversible Sulfur Dioxide Adsorption on a Microporous Metal-Organic Framework via Polar Sites. In: ACS Applied Materials and Interfaces. 2019 ; Vol. 11, No. 11. pp. 10680-10688.
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