Abstract
The study investigates the catalytic properties of microporous (H–Y) and micro-meso-macroporous (H–Y-mmm) FAU-type zeolites in the synthesis of 2-methyl-5-ethylpyridine (MEP) by the reaction of acetaldehyde with ammonia. At 150°C, an acetaldehyde to ammonia molar ratio of 1 : 3, and a catalyst content of 10 wt %, a MEP yield of 58% (0.95H–Y) and 63% (0.95H–Y-mmm) was achieved with a MEP selectivity of 91 and 93%, respectively. The examination of the catalyst stability revealed that hierarchical H–Y-mmm zeolites ensure a 100% MEP selectivity during 4–5 cycles with a slight decline in the catalytic activity, while H–Y zeolites are active during the first cycle only.
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The study described here was performed with financial support from the Russian Science Foundation (grant no. 20-63-46011).
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Translated from Sovremennye Molekulyarnye Sita. Advanced Molecular Sieves, 2021, Vol. 3, No. 1, pp. 119–124.
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Grigor’eva, N.G., Filippova, N.A., Bubennov, S.V. et al. Microporous and Micro-meso-macroporous Y Zeolites in the Synthesis of 2-Methyl-5-ethylpyridine. Pet. Chem. 61, 364–369 (2021). https://doi.org/10.1134/S0965544121030075
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DOI: https://doi.org/10.1134/S0965544121030075