Journal
NANOMATERIALS
Volume 11, Issue 12, Pages -Publisher
MDPI
DOI: 10.3390/nano11123171
Keywords
SSZ-13; hydrothermal synthesis; hierarchical pore; molecular sieves; CO2 adsorption
Categories
Funding
- Jiangxi Province Double Thousand Talents Plan [jxsq2020101049]
- Jiangxi Provincial Natural Science Foundation of China [20202BABL203021]
- Jiangsu Province Key Laboratory of Fine Petrochemical engineering [KF1904]
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By introducing aluminum nitrate and fluoride ions under unconventional synthesis conditions, SSZ-13 zeolite with excellent catalytic and adsorption performance was prepared, showing the advantage of a multistage pore structure.
SSZ-13, with a unique pore structure and excellent thermal stability, showed a potential application in the adsorption and catalysis industry. In this work, Al(NO3)(3) was used as an Al source to study the performance and morphology of the zeolite. The zeolite was prepared with an unconventional process by adding an Al source before the structure-directing agent and base. When inorganic oxygen-containing anions were introduced into the unconventional synthesis system, the crystals of the zeolite conform to the unconventional growth mode. The zeolites with large crystals were assembled from small unit nanocrystals. Extending the reaction time, aging time and adding fluoride ions introduced a multistage pore structure on the surface of the molecular sieve, which improved the CO2 adsorption performance. When aging for 24 h, reaction for 96 h, and the amount of fluorine added was 0.05 (F/Si), the sample had the best hierarchical pore structure. The SSZ-13 molecular sieve with an added amount of 0.1 (F/Si) has the highest CO2 adsorption performance. The adsorption amount was 4.55 mmol/g at 1 bar, which is 20.4% higher than that of zeolite SSZ-13 prepared by the conventional process.
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