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Solvent-free synthesis of aluminosilicate SSZ-39 zeolite
Ist Teil von
Microporous and mesoporous materials, 2021-01, Vol.312, p.110736, Article 110736
Ort / Verlag
Elsevier Inc
Erscheinungsjahr
2021
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
Aluminosilicate SSZ-39 zeolite shows the excellent catalytic performance in selective catalytic reduction of NOx with NH3 (NH3-SCR) reaction, but their synthesis is still not efficient due to the use of a large amount of water as a solvent under hydrothermal condition. Herein, for the first time, we report a solvent-free synthesis of aluminosilicate SSZ-39 zeolite without addition of water in the presence of N,N-dimethyl-3,5-dimethylpiperidine (DMDMP) cation as an organic structure-directing agent. Various characterizations, including powder X-ray diffraction (XRD), scanning electron microscopy (SEM), thermogravimetry-differential thermal analysis (TG-DTA), N2 sorption, inductively coupled plasma optical emission spectroscopy (ICP-OES) analysis, solid nuclear magnetic resonance (NMR) and NH3-temperature-programmed desorption (NH3-TPD), show that the aluminosilicate SSZ-39 zeolite displays high crystallinity, uniform sheet-like morphology, large surface area, four-coordinated aluminum species, strong acidic sites and excellent hydrothermal stability. Compared with the conventional synthesis for aluminosilicate SSZ-39 zeolite, the solvent-free synthesis of aluminosilicate SSZ-39 zeolite has the obvious advantages such as high product yield, simple synthesis procedures, and the reduction of pollutants. More importantly, the copper-exchanged aluminosilicate SSZ-39 zeolite shows the good catalytic performance in NH3-SCR reaction, which is fully comparable with that of the Cu-SSZ-39 zeolite synthesized under hydrothermal condition from the reported literature.
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•Aluminosilicate SSZ-39 zeolite is synthesized under solvent-free condition.•This route enhances the utilization efficiency of both the raw materials and space.•The Cu-exchanged SSZ-39 zeolite shows good catalytic performance in NH3-SCR reaction.•This route is sustainable.