Abstract: The effect of Mg on the acidic and metal functions in Pt/ZSM-23 catalysts has been studied, using both pure zeolite (Z) and preshaped ZSM-23/Al2O3 composite (ZA) and varying the content and method of Mg loading. N2 physisorption, CO chemisorption, H2/O2 titration, XRD, TEM, TPR, and FTIR were employed to characterize the phase composition, textural and acidic properties, platinum location and dispersion. The shaping procedure used left the acidity of the parent zeolite virtually intact, while Pt dispersion on the composite support was greatly increased. Despite the increased CPt/CH+ ratio, the Pt/ZA catalyst underperformed Pt/Z in the yield of branched isomers produced in n-decane hydroconversion. Irrespective of the support, its impregnation with Mg allowed tuning the surface acidity and improving the isomerization selectivity above the level characteristic of unpromoted Pt/Z. However, the addition of Mg through ion-exchange resulted in an opposite effect on the catalyst selectivity. Possible reasons of such a complex behavior are discussed. © 2022 Wiley-VCH GmbH.

Cite: Bogomolova T.S. , Lisitsyn A.S. , Ayupov A.B. , Gerasimov E.Y. , Klimov O.V. , Noskov A.S. , Smirnova M.Y.
Characterization and Hydroisomerization Performance of Mg-Promoted Pt/ZSM-23-Based Catalysts
European Journal of Inorganic Chemistry. 2022. V.2022. N14. e202200085 :1-8. DOI: 10.1002/ejic.202200085R1 WOS Scopus РИНЦ

Dates:

Submitted:	Feb 8, 2022
Accepted:	Mar 23, 2022
Published online:	Mar 27, 2022
Published print:	May 17, 2022

Identifiers:

Web of science:	WOS:000782523900001
Scopus:	2-s2.0-85128033128
Elibrary:	48427879

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Elibrary	4
Scopus	4
Web of science	2

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