Number of the records: 1
Synergism between Ni and W in the NiW/gama-Al2O3 Hydrotreating Catalysts
- 1.
SYSNO ASEP 0028758 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title Synergism between Ni and W in the NiW/gama-Al2O3 Hydrotreating Catalysts Title Synergismus mezi Ni a W v NiW/gama-Al2O3 odsiřovacích katalyzátorech Author(s) Spojakina, A.A. (BG)
Palcheva, R. (BG)
Jirátová, Květa (UCHP-M) RID, ORCID, SAI
Tyuliev, G. (BG)
Petrov, L. (BG)Source Title Catalysis Letters - ISSN 1011-372X
Roč. 104, 1-2 (2005), s. 45-52Number of pages 8 s. Language eng - English Country US - United States Keywords NiW/gama-Al2O3 ; Thiophene hydrodesulfurization ; TPR, XPS Subject RIV CI - Industrial Chemistry, Chemical Engineering CEZ AV0Z40720504 - UCHP-M (2005-2011) Annotation A series of NiW/ c-Al2O3 catalysts (20 and 30 wt% W and 1–5 wt% Ni) have been prepared and studied by TPR and XPS. HDS activity has been tested in the thiophene conversion. The e?ect of Ni and W loadings on the formation of di?erent structures is presented. In the calcined catalysts several phases coexist, concentrations of which depend on the Ni/(Ni+W) atomic ratio. The Ni synergistic e?ect in the HDS reaction is con?rmed by the increase in the HDS activity ( 10–15 times). This e?ect is ascribed to the formation of an active NiWS phase of high dispersion from the mixed NiW oxide precursors. At higher Ni/Ni+W ratio a redistribution of active components in additional amount ofNiWS phase during sul?dation is suggested. Workplace Institute of Chemical Process Fundamentals Contact Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227 Year of Publishing 2006
Number of the records: 1