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- W2809942401 abstract "DNL-6, a silicoaluminophosphate (SAPO) molecular sieve with RHO topology, was hydrothermally synthesized using a new structure-directing agent (SDA), N,N ′-dimethylethylenediamine. The obtained samples were characterized by X-ray diffraction, X-ray fluorescence, X-ray photoelectron spectroscopy, scanning electron microscopy, and N 2 adsorption, which indicated that the synthesized DNL-6s have high crystallinity and relatively high Si content ranging from 20% to 35%. Solid-state magic-angle-spinning (MAS) nuclear magnetic resonance ( 13 C, 29 Si, 27 Al, 31 P, and 27 Al multiple-quantum (MQ)) was conducted to investigate the status of the SDA and local atomic environment in the as-synthesized DNL-6. Thermal analysis revealed the presence of a large amount of amines in the DNL-6 crystals (about 4.4 SDAs per α-cage), which was the reason for the formation of DNL-6 with an ultrahigh Si content (36.4% Si per mole). Interestingly, DNL-6 exhibited excellent catalytic performance for methanol amination. More than 88% methanol conversion and 85% methylamine plus dimethylamine selectivity could be achieved due to the combined contribution of strong acid sites, suitable acid distribution, and narrow pore dimensions of DNL-6. N,N ′-dimethylethylenediamine was used as a template to synthesize DNL-6 with a high Si content, which showed excellent catalytic performance in the methanol amination reaction." @default.
- W2809942401 created "2018-07-10" @default.
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- W2809942401 date "2018-09-01" @default.
- W2809942401 modified "2023-10-16" @default.
- W2809942401 title "Silicoaluminophosphate molecular sieve DNL-6: Synthesis with a novel template, N,N ′-dimethylethylenediamine, and its catalytic application" @default.
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- W2809942401 doi "https://doi.org/10.1016/s1872-2067(18)63122-5" @default.
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