A Promoted Mesoporous Silica-Based Material for SO2 Adsorption

Mesoporous materials have been widely used in the adsorption of air pollutants because of their uniform pore structure and large specific surface area. In this study, hexadecyltrimethylammonium chloride and tetramethylammonium hydroxide pentahydrate were used as structure-directing agents, silica as...

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Bibliographic Details
Published in:SILICON 2022-04, Vol.14 (5), p.2225-2233
Main Authors: Gang, Li, Shaoguang, Hua, Qian, Kang
Format: Article
Language:English
Subjects:
Activated carbon
Adsorption
Chemistry
Chemistry and Materials Science
Environmental Chemistry
Flue gas
Fourier transforms
Functional groups
Hydrothermal reactions
Infrared analysis
Inorganic Chemistry
Lasers
Materials Science
Optical Devices
Optics
Original Paper
Photonics
Polymer Sciences
Silicon dioxide
Specific surface
Sulfur dioxide
Surface area
Surface chemistry
Surface stability
Thermal stability
Thermogravimetric analysis
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Summary:Mesoporous materials have been widely used in the adsorption of air pollutants because of their uniform pore structure and large specific surface area. In this study, hexadecyltrimethylammonium chloride and tetramethylammonium hydroxide pentahydrate were used as structure-directing agents, silica as a silicon source, and tetramethylammonium silicate as a functional group to prepare a mesoporous silica-based material (MSBM) by a designed hydrothermal reaction. The synthetic materials were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Brunner-Emmet-Teller (BET), Fourier-transform infrared spectroscopy (FITR), and thermogravimetric analysis (TGA). The adsorption efficiency of MSBM for SO 2 in simulated flue gas under different conditions was studied. The results showed that the structure of the MSBM was the hexagonally ordered MCM-41 structure. It had the characteristics of uniform appearance, large specific surface area, rich surface groups, and strong thermal stability. The static activity of SO 2 in flue gas could reach 32.1 mg/g under optimal conditions, which was slightly inferior to activated carbon. Therefore, MSBM has great practical application potential in the treatment of SO 2 in flue gas.
ISSN:1876-990X
1876-9918
DOI:10.1007/s12633-021-01023-5