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Alternative Preparation of Improved NiMo-Alumina Deoxygenation Catalysts
Authors: Priecel Peter | Kubicka David | Vazquez-Zavala Armando | Antonio de los Reyes Jose | Pouzar Miloslav | Čapek Libor
Year: 2020
Type of publication: článek v odborném periodiku
Name of source: Frontiers in chemistry
Publisher name: FRONTIERS MEDIA SA
Place: Lausanne
Page from-to: "216-1"-"216-12"
Titles:
Language Name Abstract Keywords
cze Alternativní příprava vylepšeného NiMo-alumina deoxygenačního katalyzátoru Práce se zabývá zpracováním NiMo-aluminy jako efektivního katalyzátor pro deoxygenaci řepkového oleje. Hlavním cílem bylo porovnání struktury katalyzátoru a jeho účinnosti. deoxygenace; NiMo-alumina; etanol; příprava; impregnace
eng Alternative Preparation of Improved NiMo-Alumina Deoxygenation Catalysts This investigation deals with NiMo-alumina hydrotreating catalysts effective in the deoxygenation of rapeseed oil. The main goal was to compare catalyst structure and their deoxygenation performance and to link these parameters to reveal important structural information regarding the catalyst's intended use. Catalysts were prepared from different precursors (nickel acetate tetrahydrate/molybdenyl acetylacetonate in ethanol and water vs. nickel nitrate hexahydrate/ammonium heptamolybdate tetrahydrate in water), which resulted in their contrasting structural arrangement. These changes were characterized by elemental composition determination, UV-Vis diffuse reflectance spectroscopy, temperature programmed reduction by hydrogen, nitrogen physisorption at 77 K, scanning and transmission electron microscopies, and deoxygenation of rapeseed oil. The critical aspect of high oxygen elimination was a homogeneous dispersion of NiO and MoO3 phases on the support. It subsequently led to the effective transformation of the oxide form of a catalyst to its active sulfide form well-dispersed on the support. On the other hand, the formation of bulk MoO3 resulted in the separate bulk phase and lower extent of sulfidation. deoxygenation; NiMo-alumina; ethanol; preparation; impregnation; hydrotreating

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