CoZr Nanocomposites in a Ceramic-Metal AlOx(OH)y/Al Matrix with Different Co/Zr Ratio and Its Potential for Syngas Processing Full article
| Journal |
Dalton Transactions
ISSN: 1477-9226 , E-ISSN: 1477-9234 |
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| Output data | Year: 2024, Volume: 53, Number: 25, Pages: 10720-10729 Pages count : 9 DOI: 10.1039/D4DT00960F | ||
| Tags | Binary alloys; Cobalt; Hydrocarbons; Metal nanoparticles; Metallic matrix composites; Nanocatalysts; Organometallics; Powder metals; Scanning electron microscopy; Synthesis (chemical); Synthesis gas; Zirconium | ||
| Authors |
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| Affiliations |
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Funding (1)
| 1 | Ministry of Science and Higher Education of the Russian Federation | FWUR-2024-0033 |
Abstract:
We investigated the possibility of synthesizing Co nanoparticles in CoZrnH/AlOx(OH)y/Al ceramic-metal catalysts and controlling catalytic properties of these nanoparticles in the syngas conversion by changing the Co/Zr ratio. The CoZr nanocomposites were obtained from metal powders by mechanochemical activation in high-energy mill, in an argon atmosphere, followed by treatment in hydrogen at high pressures and room temperature. Ceramic-metal catalysts were prepared by mixing the corresponding CoZrnH powder nanocomposite - (30 wt.%) with powdered aluminum – 70 wt.%, hydrothermal treatment of the mixture and subsequent calcination. The materials were characterized with the set of physicochemical methods: powder X-ray diffraction, scanning electron microscopy, 59Co internal field nuclear magnetic resonance spectroscopy spectroscopy, temperature programmed reduction. Catalytic studies were performed in laboratory fixed-bed flow reactor at 2 MPA and 210-270°C. It is shown that the activity in syngas conversion to C5+ hydrocarbons and selectivity to methane and C2-C4 hydrocarbons - depend on Co/Zr ratio. Thus, with an increase in the zirconium content in the samples, the interaction of metal cobalt with metal zirconium improves in process of mechanical activation and subsequent treatment with hydrogen. Wherein the destruction of agglomerates of crystallites of metallic cobalt in the form of β-Co (Cofcc) occurs and their transformation to α-Co (Cohcp) particles active in the syngas conversion to C5+ hydrocarbons. This can explain the highest specific yield of C5+ hydrocarbons on cermet with lowest Co/Zr ratio.
Cite:
Dokuchits E.V.
, Tikhov S.F.
, Valeev K.R.
, Kardash T.Y.
, Rogov V.A.
, Salanov A.N.
, Yakovlev I.
, Lapina O.B.
, Minyukova T.
CoZr Nanocomposites in a Ceramic-Metal AlOx(OH)y/Al Matrix with Different Co/Zr Ratio and Its Potential for Syngas Processing
Dalton Transactions. 2024. V.53. N25. P.10720-10729. DOI: 10.1039/D4DT00960F WOS Scopus РИНЦ AN OpenAlex
CoZr Nanocomposites in a Ceramic-Metal AlOx(OH)y/Al Matrix with Different Co/Zr Ratio and Its Potential for Syngas Processing
Dalton Transactions. 2024. V.53. N25. P.10720-10729. DOI: 10.1039/D4DT00960F WOS Scopus РИНЦ AN OpenAlex
Dates:
| Submitted: | Apr 2, 2024 |
| Accepted: | Jun 3, 2024 |
| Published online: | Jun 4, 2024 |
| Published print: | Jun 24, 2024 |
Identifiers:
| Web of science: | WOS:001247624800001 |
| Scopus: | 2-s2.0-85196019556 |
| Elibrary: | 68460924 |
| Chemical Abstracts: | 2024:1310417 |
| OpenAlex: | W4399348606 |
Citing:
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