2 ноември 2025
Palcheva, R., Kaluza, L., Shestakova, P., Moravcik, J., Lyutskanova, A., Soukup, K., Kalvachev, Y., Tyuliev, G., Jiratova, K..
(
Анастасия Люцканова;
Георги Тюлиев;
Радостина Палчева;
Юрий Кълвачев;
)
Abstract
In chemical technologies, the formation of carbon-carbon bonds has gained an increasing importance in recent years. In this work, we studied L-zeolite as a catalyst support for the gas-phase Guerbet coupling of 1-butanol at atmospheric pressure and 400?°C. Low-loaded monometallic (Mg and Li) catalysts were synthesized by incipient wetness impregnation and their physicochemical properties were characterized by N2 and Ar adsorption-desorption isotherms, XRD, FT-IR, temperature-programmed desorption of NH3 and CO2, 29Si and 27Al MAS NMR, and XPS. XRD and FTIR results showed no major change in the crystal structure of the doped zeolite. Impregnation of the zeolite by Mg and Li decreased the surface area and significantly reduced the micropore volume, but crystallinity was preserved. 29Si MAS NMR indicated that desilication had occurred to some extent during catalyst impregnation, which led to the formation of mesopores. The Li/L catalyst showed more basic sites of intermediate strength due to surface Li-O pairs on the surface, which, together with mesoporosity, contribute to enhancing 1-butanol conversion by C-C coupling. The Li/L catalyst was more selective to C8 oxygenate products than the reference aldol condensation catalyst.
Catalysis Today, 459, Elsevier, 2025, ISSN:09205861, SJR (Scopus):1.05, JCR-IF (Web of Science):5.3 Q1, не оглавява ранглистата (Web of Science)
https://www.sciencedirect.com/science/article/pii/S0920586125002548
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