Abstract: A series of Ni2P catalysts on an Al2O3-SAPO-11 composite support were synthesized by two different methods: reduction of Ni and P precursors by hydrogen at elevated temperatures (TPR); and phosphidation of supported Ni metallic particles by triphenylphosphine (PPh3). For loading active components, aqueous solutions prepared from different precursors (specifically, Ni(OAc)2 and (NH4)2HPO4; Ni(OH)2 and H3PO3; and Ni(OAc)2 and H3PO2) were used in the first case, and a Ni(OAc)2 solution was used in the second. The catalysts were characterized by chemical analysis, H2-TPR, NH3-TPD, XRD, TEM, XPS, and 27Al M­­AS NMR. The catalyst performance was tested in hydroprocessing of a model compound of fatty acid triglycerides, specifically methyl palmitate (MP). The formation of a Ni2P phase was confirmed by XRD, TEM, and XPS; moreover, the synthesis method was found to affect the localization of Ni2P nanoparticles. It was further revealed that, in the TPR method, the particles are predominantly located on the Al2O3 surface, whereas the PPh3 method produces particles on the surfaces of both Al2O3 and SAPO-11. The main MP conversion products are n- and iso-alkanes (C15 and C16). At 100% conversion of oxygenates, the PPh3-synthesized catalyst achieved a higher iso-alkane selectivity (63%) than the TPR-prepared samples (2–21%).

Cite: Shamanaev I.V. , Vlasova E.N. , Yakovlev I.V. , Fedorov A.Y. , Pakharukova V.P. , Gerasimov E.Y. , Bukhtiyarova G.A.
Ni2P/Al2O3-SAPO-11 Catalysts for Hydroprocessing of Methyl Palmitate: a Comparative Investigation of Synthesis Methods
Petroleum Chemistry. 2024. DOI: 10.1134/s096554412406015x WOS Scopus AN OpenAlex

Dates:

Submitted:	Jul 10, 2024
Accepted:	Oct 23, 2024
Published online:	Nov 15, 2024

Identifiers:

Web of science:	WOS:001354673400001
Scopus:	2-s2.0-85208929008
Chemical Abstracts:	2024:2504566
OpenAlex:	W4404373918

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