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Hydrodesulfurization Activities of NiMo Catalysts Supported on Mechanochemically Prepared Al‐Ce Mixed Oxides.

SYSNO ASEP	0455543
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Hydrodesulfurization Activities of NiMo Catalysts Supported on Mechanochemically Prepared Al‐Ce Mixed Oxides.
Author(s)	Jirátová, Květa (UCHP-M)_{RID, ORCID, SAI} Spojakina, A. (BG) Kaluža, Luděk (UCHP-M)_{RID, ORCID, SAI} Palcheva, R. (BG) Balabánová, Jana (UCHP-M)_{RID, ORCID, SAI} Tyuliev, G. (BG)
Source Title	Chinese Journal of Catalysis - ISSN 0253-9837 Roč. 37, č. 2 (2016), s. 258-267
Number of pages	10 s.
Language	eng - English
Country	CN - China
Keywords	nickel ; molybdenum ; alumina
Subject RIV	CI - Industrial Chemistry, Chemical Engineering
OECD category	Chemical process engineering
R&D Projects	GAP106/11/0902 GA ČR - Czech Science Foundation (CSF)
Institutional support	UCHP-M - RVO:67985858
UT WOS	000371376600007
EID SCOPUS	84958181330
DOI	10.1016/S1872-2067(15)61016-6
Annotation	Al2O3‐CeO2 supports containing 1–10 wt% Ce were prepared mechanochemically by milling aluminum and/or cerium nitrates with NH4HCO3. Heteropolymolybdate, (NH4)4NiMo6O24, was used as the precursor of the Ni and Mo to prepare NiMo6/Al2O3‐CeO2 components in catalysts by impregnation method. The physicochemical properties of the catalysts were determined using chemical analysis, X‐ray diffraction, temperature‐programmed H2 reduction, temperature‐programmed NH3 desorption, X‐ray photoelectron spectroscopy (XPS), and the Brunauer–Emmett–Teller method. The catalyst acidity decreased with increasing Ce concentration in the support. XPS showed that the NiS/MoS ratio decreased two‐fold for the Ce‐modified alumina support. NiMo6/Al2O3, which had the highest acidity, showed the highest activity in hydrodesulfurization of 1‐benzothiophene (normalized per weight of catalyst). The concentration of surface MoOxSy species (which is equal to the concentration of Mo5+) gradually decreased to zero for catalysts with Ce concentrations 10 wt%. However, the activities of all the catalysts prepared mechanochemically from Al2O3 and Al2O3‐CeO2 supports significantly exceeded that of a reference NiMo6/Al2O3 catalyst prepared by impregnation method using the same precursor and with the same composition.
Workplace	Institute of Chemical Process Fundamentals
Contact	Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227
Year of Publishing	2017

Number of the records: 1