Highly Selective and Reversible Sulfur Dioxide Adsorption on a Microporous Metal-Organic Framework via Polar Sites
| Autor: | Jiejing Huang, Yan Zhang, Weikang Yu, Jinghan Zhang, Mai Xu, Zheling Zeng, Peixin Zhang, Qiang Deng, Shuguang Deng, Jun Wang |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Flue gas
Materials science 02 engineering and technology Microporous material 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Flue-gas desulfurization chemistry.chemical_compound Adsorption Chemical engineering chemistry General Materials Science Metal-organic framework Density functional theory 0210 nano-technology Selectivity Sulfur dioxide |
| Zdroj: | ACS applied materialsinterfaces. 11(11) |
| ISSN: | 1944-8252 |
| Popis: | It is very challenging to achieve efficient and deep desulfurization, especially in flue gases with an extremely low SO2 concentration. Herein, we report a microporous metal–organic framework (ELM-12) with specific polar sites and proper pore size for the highly efficient SO2 removal from flue gas and other SO2-containing gases. A high SO2 capacity of 61.2 cm3·g–1 combined with exceptionally outstanding selectivity of SO2/CO2 (30), SO2/CH4 (871), and SO2/N2 (4064) under ambient conditions (i.e., 10:90 mixture at 298 K and 1 bar) was achieved. Notably, the SO2/N2 selectivity is unprecedented among ever reported values of porous materials. Moreover, the dispersion-corrected density functional theory calculations illustrated the superior SO2 capture ability and selectivity arise from the high-density SO2 binding sites of the CF3SO3– group in the pore cavity (Sδ+···Oδ− interactions) and aromatic linkers in the pore walls (Hδ+···Oδ− interactions). Dynamic breakthrough experiments confirm the regeneration stabi... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|