Sol-Gel Prepared Ternary Ni-Ce-Mg-O Oxide Systems: The Role of CeO2 in Balancing Between Dry Reforming of Methane and Pyrolysis of Hydrocarbons Full article
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Journal of Sol-Gel Science and Technology
ISSN: 0928-0707 , E-ISSN: 1573-4846 |
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| Output data | Year: 2024, Volume: 109, Pages: 859–877 Pages count : 19 DOI: 10.1007/s10971-024-06336-6 | ||
| Tags | Sol-gel synthesis; temperature-programmed reduction; dry reforming of methane; catalytic chemical vapor deposition; carbon nanofibers | ||
| Authors |
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| Affiliations |
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Funding (1)
| 1 | Ministry of Science and Higher Education of the Russian Federation | FWUR-2024-0034 |
Abstract:
In this study, the modified alkoxide sol–gel approach was used for the synthesis of ternary Ni–Ce–Mg–O oxide systems of variable composition. The prepared samples were characterized by thermal analysis, low-temperature nitrogen adsorption, transmission electron microscopy, X-ray diffraction, and temperature-programmed reduction. The presence of CeO2 in the oxide composition was found to affect such properties as texture, morphology, reducibility of Ni2+, and dispersion of Ni0 in the reduced samples. The catalytic properties of the Ni–Ce–Mg–O samples were examined with regard to dry reforming of methane (DRM) and catalytic pyrolysis of hydrocarbons with the formation of carbon nanofibers (CNF). It was found that the CeO2-containing samples demonstrate more stable performance in DRM and are less prone to coke formation. The Ni10Ce10 catalyst containing 10% NiO and 10% CeO2 within the MgO matrix demonstrated the highest CO2 and CH4 conversion values. Contrarily, the highest carbon yield was observed for the Ni15Ce5 sample (15 wt% NiO, 5 wt% CeO2). An increase in the CeO2 content diminished the carbon yield. The structure of the formed CNFs was affected by the type of substrate used (ethylene or a mixture of C2-C4 saturated hydrocarbons). Thus, the sol–gel technique was shown to be efficient for the preparation of ternary Ni–Ce–Mg–O systems with a high content of nickel and ceria species evenly distributed within the MgO matrix. Varying the ceria content, it is possible to balance between the DRM and catalytic pyrolysis modes of the catalyst operation.
Cite:
Veselov G.B.
, Afonnikova S.D.
, Mishakov I.V.
, Vedyagin A.A.
Sol-Gel Prepared Ternary Ni-Ce-Mg-O Oxide Systems: The Role of CeO2 in Balancing Between Dry Reforming of Methane and Pyrolysis of Hydrocarbons
Journal of Sol-Gel Science and Technology. 2024. V.109. P.859–877. DOI: 10.1007/s10971-024-06336-6 WOS Scopus РИНЦ AN OpenAlex
Sol-Gel Prepared Ternary Ni-Ce-Mg-O Oxide Systems: The Role of CeO2 in Balancing Between Dry Reforming of Methane and Pyrolysis of Hydrocarbons
Journal of Sol-Gel Science and Technology. 2024. V.109. P.859–877. DOI: 10.1007/s10971-024-06336-6 WOS Scopus РИНЦ AN OpenAlex
Dates:
| Submitted: | Dec 12, 2023 |
| Accepted: | Feb 1, 2024 |
| Published online: | Feb 15, 2024 |
| Published print: | Mar 1, 2024 |
Identifiers:
| Web of science: | WOS:001162534300001 |
| Scopus: | 2-s2.0-85185112830 |
| Elibrary: | 66950337 |
| Chemical Abstracts: | 2024:379696 |
| OpenAlex: | W4391836386 |