Number of the records: 1
NiMo Catalysts Supported on Al-Based Mixed Oxide Prepared By Hydrothermal Method: Effect of Zn/Al Ratio and Addition of Silica on HDS Activity
- 1.
SYSNO ASEP 0532119 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title NiMo Catalysts Supported on Al-Based Mixed Oxide Prepared By Hydrothermal Method: Effect of Zn/Al Ratio and Addition of Silica on HDS Activity Author(s) Palcheva, R. (BG)
Kaluža, Luděk (UCHP-M) RID, ORCID, SAI
Moravčík, Jan (UCHP-M) SAI
Tyuliev, G. (BG)
Dimitrov, L. (BG)
Jirátová, Květa (UCHP-M) RID, ORCID, SAI
Avdeev, G. (BG)
Tenchev, K. (BG)
Spojakina, A. (BG)Source Title Catalysis Letters - ISSN 1011-372X
Roč. 150, č. 11 (2020), s. 3276-3286Number of pages 11 s. Language eng - English Country US - United States Keywords NiMo/al–znx catalysts ; silica addition ; 12-molybdophosphoric acid Subject RIV CF - Physical ; Theoretical Chemistry OECD category Physical chemistry R&D Projects GA17-22490S GA ČR - Czech Science Foundation (CSF) Method of publishing Limited access Institutional support UCHP-M - RVO:67985858 UT WOS 000529122300001 EID SCOPUS 85084224433 DOI 10.1007/s10562-020-03232-w Annotation The effect of Zn/Al ratio and addition of silica to Al–Znx oxides on the structure and catalytic properties of supported NiMo catalysts in hydrodesulfurization reaction of thiophene was studied. Colloidal SiO2 was added to the Al–Znx oxides (Si/Al = 0.3 ratio) to modify textural and structural properties of NiMo catalysts. The surface area of the supports calcined at 500 °C, decreases with the increasing Zn/Al ratio, which could be due to the interaction of the Zn with the alumina, leading to formation of Zn-spinel. After impregnation of the supports with NiMo active components, the presence of Zn increases the amount of surface Mo in octahedral sites at Zn/Al = 0.21 ratio. At this ratio maximum in HDS activity of NiMo/Al–Znx samples was observed. Addition of silica to Al-Zn mixed oxide (Zn/Al = 0.16) leads to more active NiMo catalyst due to formation of more Ni(Zn)–Mo–S active species as revealed by XRD and HRTEM. Workplace Institute of Chemical Process Fundamentals Contact Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227 Year of Publishing 2021 Electronic address http://hdl.handle.net/11104/0311280
Number of the records: 1