Abstract: A series of supported Ni phosphide bifunctional hydroisomerization catalysts (Ni2P/ZSM-23/Al2O3) was synthesized by means of Ni hypophosphite reduction at different temperatures. The structure and morphology of Ni phosphide phase were determined by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The surface chemical analysis was performed using X-ray photoelectron spectroscopy (XPS). The hydro/dehydrogenation and acid functions of catalysts were characterized by CO chemisorption, NH3-TPD and IR-spectroscopy of adsorbed pyridine (IR-Py). The reduction of supported precursor at the temperature lying in the range of 550–650 ⁰С resulted in high activity and iso-selectivity in n-decane conversion. The reduction of the supported component at 500 ⁰C or re-reduction of ex-situ reduced and passiv- ated catalysts at 450 ⁰C led to the formation of impurities of other Ni phosphides such as NiP and Ni5P4 and had a negative impact on n-decane conversion. Both the Brønsted acidity and Ni2P dispersion of the catalysts declined with increasing Ni2P content which were accompanied by a drop in their activity without loss of iso-selectivity.

Cite: Bogomolova T.S. , Smirnova M.Y. , Parfenov M.V. , Cherepanova S.V. , Panafidin M.A. , Klimov O.V. , Noskov A.S.
ZSM-23-Supported Nickel Phosphide Catalysts for n-Alkane Hydroisomerization
Catalysis Letters. 2025. V.155. N2. P.60. DOI: 10.1007/s10562-024-04895-5 WOS Scopus OpenAlex publication_identifier_short.sciact_skif_identifier_type

Dates:

Submitted:	Sep 19, 2024
Accepted:	Nov 16, 2024
Published online:	Jan 2, 2025
Published print:	Feb 1, 2025

Identifiers:

Web of science:	WOS:001389943500009
Scopus:	2-s2.0-85213949005
OpenAlex:	W4406002870
publication_identifier.sciact_skif_identifier_type:	3655

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