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Data publikacji: 2025-03-04

Zinc‐Containing BEA Zeolites for the Propane Dehydrogenation Reaction: Influence of Adding Yttrium on the Catalytic Properties

S.M. Orlyk, N.V. Vlasenko, V.I. Chedryk, Y.M. Nychiporuk, F. Averseng, Y. Millot, L. Valentin, Jacek Gurgul, S. Dzwigaj

ChemPlusChem 90 (2025-03-04) e202400723
https://doi.org/10.1002/cplu.202400723
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Abstrakt

Research results about the structure, acid-base, redox, and adsorption characteristics of zinc(yttrium)-containing dealuminated BEA zeolites (Si/Al=1000), Zn(Y)SiBEA and their catalytic properties in the propane dehydrogenation with CO2 (CO2-PDH) are presented. The catalysts were prepared through a two-step procedure involving complete dealumination of the BEA zeolite followed by the introduction of Zn2+ and Y3+ cations into vacant T-atom sites, by impregnation. The samples obtained were characterized using XRD, XPS, 29Si DP MAS NMR, low-temperature N2 ad/desorption, TPR-H2, C3H8/C3H6 (CO2, NH3)-TPD, and FTIR-Py techniques. The influence of zinc content and yttrium on the functional properties of Zn(Y)SiBEA surface and activity/selectivity of the catalysts (Zn1.0-, Zn2.0-, and Zn2.0Y2.0SiBEA) in the CO2-PDH process are analyzed. The balanced acid-base characteristics of the Zn(Y)SiBEA catalysts determine their activity/selectivity in the CO2-mediated propane dehydrogenation to propene. Propane conversion and propene selectivity/yield over Zn(Y)SiBEA catalysts are higher in the CO2-PDH process compared to direct propane dehydrogenation (without CO2).

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