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Nanocrystalline Sulfided NiMoW Catalyst Supported on Mesoporous Aluminas for the Hydrodesulfurization of 4,6-Dimethyldibenzothiophene
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SYSNO ASEP 0570566 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Nanocrystalline Sulfided NiMoW Catalyst Supported on Mesoporous Aluminas for the Hydrodesulfurization of 4,6-Dimethyldibenzothiophene Tvůrce(i) Palcheva, R. (BG)
Kaluža, Luděk (UCHP-M) RID, ORCID, SAI
Petrova, T. (BG)
Dimitrov, L. (BG)
Karashanova, D. (BG)
Tyuliev, G. (BG)
Jirátová, Květa (UCHP-M) RID, ORCID, SAIČíslo článku 543 Zdroj.dok. Crystals. - : MDPI - ISSN 2073-4352
Roč. 13, č. 3 (2023)Poč.str. 16 s. Jazyk dok. eng - angličtina Země vyd. CH - Švýcarsko Klíč. slova Mo(W)S2 nanocrystals ; sol-gel synthesis ; hydrothermal synthesis Obor OECD Chemical process engineering Způsob publikování Open access Institucionální podpora UCHP-M - RVO:67985858 UT WOS 000958208500001 EID SCOPUS 85152386296 DOI 10.3390/cryst13030543 Anotace Tri-metallic NiMoW catalysts prepared by impregnating mesoporous aluminas (pore sizes of ~9 nm and surface areas of ~225 m2/g) obtained by sol-gel (NiMoW/Al) and hydrothermal (NiMoW/AlHYDT) processes were investigated in the hydrodesulfurization (HDS) of thiophene and
4,6-dimethyldibenzothiophene (4,6-DMDBT) at H2 pressures of 1 MPa and 5.0 MPa, respectively. The supports and catalysts were characterized by N2 physisorption, X-ray diffraction (XRD), scanning electron microscopy (SEM), ultraviolet-visible diffuse reflectance spectroscopy (UV-VisDRS), temperature-programmed reduction (TPR), X-ray photoelectron spectroscopy (XPS), and high resolution transmission electron microscopy (HRTEM). The NiMoW/AlHYDT catalyst, which was the most active in both test HDS reactions, was characterized by a pore size of 7.5 nm, whereas the pore
size of the catalyst on sol-gel alumina (NiMoW/Al) was only 4.8 nm. Moreover, the NiMoW/AlHYDT catalyst exhibited reduction peaks shifted to a lower temperature during TPR, indicating weaker metal support interactions, a higher degree of Mo (79%) and W (48%) sulfidation, and an optimal
layer slab length distribution of Mo(W)S2 nanocrystals preferentially between 2–4 nm with an average layer stacking of 1.7 compared to the NiMoW/Al counterpart.Pracoviště Ústav chemických procesů Kontakt Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227 Rok sběru 2024 Elektronická adresa https://www.mdpi.com/2073-4352/13/3/543
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