1. Synthesis of Catalytic Precursors Based on Mixed Ni-Al Oxides by Supercritical Antisolvent Co-Precipitation.
- Author
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Nesterov, Nikolay S., Pakharukova, Vera P., Philippov, Alexey A., Gerasimov, Evgeny Y., Tsybulya, Sergey V., and Martyanov, Oleg N.
- Subjects
DISTRIBUTION (Probability theory) ,COPRECIPITATION (Chemistry) ,METAL catalysts ,TRANSMISSION electron microscopy ,CATALYST testing ,OXIDES ,METALLIC oxides - Abstract
Mixed Ni-Al oxide catalytic precursors with different elemental ratios (20, 50, and 80 wt.% Ni
0 ) were synthesized using green supercritical antisolvent co-precipitation (SAS). The obtained oxide precursors and metal catalysts were characterized in detail by X-ray diffraction (XRD) analysis, atomic pair distribution function (PDF) analysis, CO adsorption, and high-resolution transmission electron microscopy (HRTEM). It was found that the composition and structure of the Ni-Al precursors are related to the Ni content. The mixed Ni1−x Alx O oxide with NiO-based crystal structure was formed in the Ni-enriched sample, whereas the highly dispersed NiAl2 O4 spinel was observed in the Al-enriched sample. The obtained metal catalysts were tested in the process of anisole H2 -free hydrogenation. 2-PrOH was used as a hydrogen donor. The catalyst with 50 wt.% Ni0 demonstrated the highest activity in the hydrogenation process. [ABSTRACT FROM AUTHOR]- Published
- 2022
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